[英]Move textfield when keyboard appears swift
I'm using Swift for programing with iOS and I'm using this code to move the UITextField
, but it does not work.我正在使用 Swift 进行 iOS 编程,并且我正在使用此代码移动
UITextField
,但它不起作用。 I call the function keyboardWillShow
correctly, but the textfield doesn't move.我正确调用了函数
keyboardWillShow
,但文本字段不会移动。 I'm using autolayout.我正在使用自动布局。
override func viewDidLoad() {
super.viewDidLoad()
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillShow:"), name:UIKeyboardWillShowNotification, object: nil);
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillHide:"), name:UIKeyboardWillHideNotification, object: nil);
}
deinit {
NSNotificationCenter.defaultCenter().removeObserver(self);
}
func keyboardWillShow(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue() {
//let contentInsets = UIEdgeInsets(top: 0, left: 0, bottom: keyboardSize.height, right: 0)
var frame = self.ChatField.frame
frame.origin.y = frame.origin.y - keyboardSize.height + 167
self.chatField.frame = frame
println("asdasd")
}
}
There are a couple of improvements to be made on the existing answers.对现有答案有一些改进。
Firstly the UIKeyboardWillChangeFrameNotification is probably the best notification as it handles changes that aren't just show/hide but changes due to keyboard changes (language, using 3rd party keyboards etc.) and rotations too (but note comment below indicating the keyboard will hide should also be handled to support hardware keyboard connection).首先, UIKeyboardWillChangeFrameNotification可能是最好的通知,因为它处理的更改不仅是显示/隐藏,而且是由于键盘更改(语言、使用第 3 方键盘等)和旋转而引起的更改(但请注意下面的注释表明键盘将隐藏应该也可以处理以支持硬件键盘连接)。
Secondly the animation parameters can be pulled from the notification to ensure that animations are properly together.其次,可以从通知中提取动画参数,以确保动画正确组合在一起。
There are probably options to clean up this code a bit more especially if you are comfortable with force unwrapping the dictionary code.可能有一些选项可以更清理此代码,特别是如果您对强制展开字典代码感到满意。
class MyViewController: UIViewController {
// This constraint ties an element at zero points from the bottom layout guide
@IBOutlet var keyboardHeightLayoutConstraint: NSLayoutConstraint?
override func viewDidLoad() {
super.viewDidLoad()
NotificationCenter.default.addObserver(self,
selector: #selector(self.keyboardNotification(notification:)),
name: UIResponder.keyboardWillChangeFrameNotification,
object: nil)
}
deinit {
NotificationCenter.default.removeObserver(self)
}
@objc func keyboardNotification(notification: NSNotification) {
guard let userInfo = notification.userInfo else { return }
let endFrame = (userInfo[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue
let endFrameY = endFrame?.origin.y ?? 0
let duration:TimeInterval = (userInfo[UIResponder.keyboardAnimationDurationUserInfoKey] as? NSNumber)?.doubleValue ?? 0
let animationCurveRawNSN = userInfo[UIResponder.keyboardAnimationCurveUserInfoKey] as? NSNumber
let animationCurveRaw = animationCurveRawNSN?.uintValue ?? UIView.AnimationOptions.curveEaseInOut.rawValue
let animationCurve:UIView.AnimationOptions = UIView.AnimationOptions(rawValue: animationCurveRaw)
if endFrameY >= UIScreen.main.bounds.size.height {
self.keyboardHeightLayoutConstraint?.constant = 0.0
} else {
self.keyboardHeightLayoutConstraint?.constant = endFrame?.size.height ?? 0.0
}
UIView.animate(
withDuration: duration,
delay: TimeInterval(0),
options: animationCurve,
animations: { self.view.layoutIfNeeded() },
completion: nil)
}
}
If you're using Auto Layout, I assume you've set the Bottom Space to Superview constraint.如果您使用自动布局,我假设您已将底部空间设置为 Superview约束。 If that's the case, you simply have to update the constraint's value.
如果是这种情况,您只需更新约束的值。 Here's how you do it with a little bit of animation.
这是你如何通过一点动画来做到这一点。
func keyboardWasShown(notification: NSNotification) {
let info = notification.userInfo!
let keyboardFrame: CGRect = (info[UIKeyboardFrameEndUserInfoKey] as! NSValue).CGRectValue()
UIView.animateWithDuration(0.1, animations: { () -> Void in
self.bottomConstraint.constant = keyboardFrame.size.height + 20
})
}
The hardcoded 20 is added only to pop the textfield above the keyboard just a bit.添加硬编码 20 只是为了将键盘上方的文本字段弹出一点。 Otherwise the keyboard's top margin and textfield's bottom margin would be touching.
否则键盘的上边距和文本字段的下边距会相互影响。
When the keyboard is dismissed, reset the constraint's value to its original one.当键盘关闭时,将约束的值重置为其原始值。
A simple solution is to move view up with constant of keyboard height.一个简单的解决方案是在键盘高度不变的情况下向上移动视图。
override func viewDidLoad() {
super.viewDidLoad()
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillShow:"), name:UIKeyboardWillShowNotification, object: nil);
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillHide:"), name:UIKeyboardWillHideNotification, object: nil);
}
@objc func keyboardWillShow(sender: NSNotification) {
self.view.frame.origin.y = -150 // Move view 150 points upward
}
@objc func keyboardWillHide(sender: NSNotification) {
self.view.frame.origin.y = 0 // Move view to original position
}
Swift 5:斯威夫特 5:
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow(sender:)), name: UIResponder.keyboardWillShowNotification, object: nil);
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide(sender:)), name: UIResponder.keyboardWillHideNotification, object: nil);
For moving your view while editing textfield try this , I have applied this ,为了在编辑文本字段时移动您的视图试试这个,我已经应用了这个,
Option 1 :- ** **Update in Swift 5.0 and iPhone X , XR , XS and XS Max Move using NotificationCenter选项 1:- ** **使用 NotificationCenter在 Swift 5.0 和 iPhone X、XR、XS 和 XS Max Move 中更新
Register this Notification in func viewWillAppear(_ animated: Bool)
在
func viewWillAppear(_ animated: Bool)
注册此通知
Deregister this Notification in func viewWillDisappear(_ animated: Bool)
在
func viewWillDisappear(_ animated: Bool)
取消注册此通知
Note:- If you will not deregister than it will call from child class and will reason of crashing or else.注意:- 如果您不注销,它会从子类调用,并且会导致崩溃或其他原因。
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
NotificationCenter.default.addObserver( self, selector: #selector(keyboardWillShow(notification:)), name: UIResponder.keyboardWillShowNotification, object: nil )
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
NotificationCenter.default.removeObserver(self, name: UIResponder.keyboardWillShowNotification, object: nil)
}
@objc func keyboardWillShow( notification: Notification) {
if let keyboardFrame: NSValue = notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue {
var newHeight: CGFloat
let duration:TimeInterval = (notification.userInfo![UIResponder.keyboardAnimationDurationUserInfoKey] as? NSNumber)?.doubleValue ?? 0
let animationCurveRawNSN = notification.userInfo![UIResponder.keyboardAnimationCurveUserInfoKey] as? NSNumber
let animationCurveRaw = animationCurveRawNSN?.uintValue ?? UIView.AnimationOptions.curveEaseInOut.rawValue
let animationCurve:UIView.AnimationOptions = UIView.AnimationOptions(rawValue: animationCurveRaw)
if #available(iOS 11.0, *) {
newHeight = keyboardFrame.cgRectValue.height - self.view.safeAreaInsets.bottom
} else {
newHeight = keyboardFrame.cgRectValue.height
}
let keyboardHeight = newHeight + 10 // **10 is bottom margin of View** and **this newHeight will be keyboard height**
UIView.animate(withDuration: duration,
delay: TimeInterval(0),
options: animationCurve,
animations: {
self.view.textViewBottomConstraint.constant = keyboardHeight **//Here you can manage your view constraints for animated show**
self.view.layoutIfNeeded() },
completion: nil)
}
}
Option 2 :- Its work fine选项 2 :-工作正常
func textFieldDidBeginEditing(textField: UITextField) {
self.animateViewMoving(up: true, moveValue: 100)
}
func textFieldDidEndEditing(textField: UITextField) {
self.animateViewMoving(up: false, moveValue: 100)
}
func animateViewMoving (up:Bool, moveValue :CGFloat){
var movementDuration:NSTimeInterval = 0.3
var movement:CGFloat = ( up ? -moveValue : moveValue)
UIView.beginAnimations( "animateView", context: nil)
UIView.setAnimationBeginsFromCurrentState(true)
UIView.setAnimationDuration(movementDuration )
self.view.frame = CGRectOffset(self.view.frame, 0, movement)
UIView.commitAnimations()
}
I got this answer from this source UITextField move up when keyboard appears in Swift 当键盘出现在 Swift 中时,我从这个源UITextField move up得到了这个答案
IN the Swift 4 ---在斯威夫特 4 ---
func textFieldDidBeginEditing(_ textField: UITextField) {
animateViewMoving(up: true, moveValue: 100)
}
func textFieldDidEndEditing(_ textField: UITextField) {
animateViewMoving(up: false, moveValue: 100)
}
func animateViewMoving (up:Bool, moveValue :CGFloat){
let movementDuration:TimeInterval = 0.3
let movement:CGFloat = ( up ? -moveValue : moveValue)
UIView.beginAnimations( "animateView", context: nil)
UIView.setAnimationBeginsFromCurrentState(true)
UIView.setAnimationDuration(movementDuration )
self.view.frame = self.view.frame.offsetBy(dx: 0, dy: movement)
UIView.commitAnimations()
}
I love clean Swift code.我喜欢干净的 Swift 代码。 So here's the tightest code I could come up with to move a text view up/down with the keyboard.
所以这是我能想出的最紧凑的代码,可以用键盘向上/向下移动文本视图。 It's currently working in an iOS8/9 Swift 2 production app.
它目前正在 iOS8/9 Swift 2 生产应用程序中工作。
UPDATE (March 2016): I just tightened up my previous code as much as possible.更新(2016 年 3 月):我只是尽可能地收紧了我以前的代码。 Also, there are a bunch of popular answers here that hardcode the keyboard height and animation parameters.
此外,这里有很多流行的答案,它们对键盘高度和动画参数进行了硬编码。 There's no need for that, not to mention that the numbers in these answers don't always line up with the actual values I'm seeing on my 6s+ iOS9 (keyboard height of 226, duration of 0.25, and animation curve of 7).
没有必要,更不用说这些答案中的数字并不总是与我在 6s+ iOS9 上看到的实际值一致(键盘高度为 226,持续时间为 0.25,动画曲线为 7)。 In any case, it's almost no extra code to get those values straight from the system.
无论如何,直接从系统中获取这些值几乎不需要额外的代码。 See below.
见下文。
override func viewDidLoad() {
super.viewDidLoad()
NSNotificationCenter.defaultCenter().addObserver(self, selector: "animateWithKeyboard:", name: UIKeyboardWillShowNotification, object: nil)
NSNotificationCenter.defaultCenter().addObserver(self, selector: "animateWithKeyboard:", name: UIKeyboardWillHideNotification, object: nil)
}
func animateWithKeyboard(notification: NSNotification) {
// Based on both Apple's docs and personal experience,
// I assume userInfo and its documented keys are available.
// If you'd like, you can remove the forced unwrapping and add your own default values.
let userInfo = notification.userInfo!
let keyboardHeight = (userInfo[UIKeyboardFrameEndUserInfoKey] as! NSValue).CGRectValue().height
let duration = userInfo[UIKeyboardAnimationDurationUserInfoKey] as! Double
let curve = userInfo[UIKeyboardAnimationCurveUserInfoKey] as! UInt
let moveUp = (notification.name == UIKeyboardWillShowNotification)
// baseContraint is your Auto Layout constraint that pins the
// text view to the bottom of the superview.
baseConstraint.constant = moveUp ? -keyboardHeight : 0
let options = UIViewAnimationOptions(rawValue: curve << 16)
UIView.animateWithDuration(duration, delay: 0, options: options,
animations: {
self.view.layoutIfNeeded()
},
completion: nil
)
}
NOTE: This code covers the most comment/general case.注意:此代码涵盖了大多数注释/一般情况。 However, more code may be needed to handle different orientations and/or custom keyboards Here's an in-depth article on working with the iOS keyboard.
但是,可能需要更多代码来处理不同的方向和/或自定义键盘这里有一篇关于使用 iOS 键盘的深入文章。 If you need to handle every scenario, this may help.
如果您需要处理每种情况,这可能会有所帮助。
Edit : I recommend an easier and cleaner solution.编辑:我推荐一个更简单、更清洁的解决方案。 Just change the class of bottom spacing constraint to KeyboardLayoutConstraint .
只需将底部间距约束的类更改为KeyboardLayoutConstraint 。 It will automatically expand to the keyboard height.
它会自动扩展到键盘高度。
This is an improved version of @JosephLord 's answer.这是@JosephLord 答案的改进版本。
As tested on iOS 8.3 iPad Simulator, Portrait.在 iOS 8.3 iPad 模拟器上测试,Portrait。 Xcode6.3 beta4, I found his answer doesn't work when keyboard is hiding because
UIKeyboardFrameEndUserInfoKey
is "NSRect: {{0, 1024}, {768, 264}}";
Xcode6.3 beta4,我发现他的答案在键盘隐藏时不起作用,因为
UIKeyboardFrameEndUserInfoKey
是"NSRect: {{0, 1024}, {768, 264}}";
. . The height is never
0
.高度永远不是
0
。
This goes back to use the traditional UIKeyboardWillShowNotification
and UIKeyboardWillHideNotification
to better tell when keyboard is hiding rather than relying on the end frame's height.这可以追溯到使用传统的
UIKeyboardWillShowNotification
和UIKeyboardWillHideNotification
来更好地判断键盘何时隐藏而不是依赖于结束帧的高度。 UIKeyboardWillShowNotification
is also sent when keyboard frame is changed so it should cover all use cases. UIKeyboardWillShowNotification
也会在键盘框架更改时发送,因此它应该涵盖所有用例。
// You have to set this up in storyboard first!.
// It's a vertical spacing constraint between view and bottom of superview.
@IBOutlet weak var bottomSpacingConstraint: NSLayoutConstraint!
override func viewDidLoad() {
super.viewDidLoad()
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardNotification:"), name:UIKeyboardWillShowNotification, object: nil);
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardNotification:"), name:UIKeyboardWillHideNotification, object: nil);
}
deinit {
NSNotificationCenter.defaultCenter().removeObserver(self)
}
func keyboardNotification(notification: NSNotification) {
let isShowing = notification.name == UIKeyboardWillShowNotification
if let userInfo = notification.userInfo {
let endFrame = (userInfo[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.CGRectValue()
let endFrameHeight = endFrame?.size.height ?? 0.0
let duration:NSTimeInterval = (userInfo[UIKeyboardAnimationDurationUserInfoKey] as? NSNumber)?.doubleValue ?? 0
let animationCurveRawNSN = userInfo[UIKeyboardAnimationCurveUserInfoKey] as? NSNumber
let animationCurveRaw = animationCurveRawNSN?.unsignedLongValue ?? UIViewAnimationOptions.CurveEaseInOut.rawValue
let animationCurve:UIViewAnimationOptions = UIViewAnimationOptions(rawValue: animationCurveRaw)
self.bottomSpacingConstraint?.constant = isShowing ? endFrameHeight : 0.0
UIView.animateWithDuration(duration,
delay: NSTimeInterval(0),
options: animationCurve,
animations: { self.view.layoutIfNeeded() },
completion: nil)
}
}
i am working with swift 4 and i am solved this issue without use any extra bottom constraint look my code is here.its really working on my case我正在使用swift 4 ,我在没有使用任何额外底部约束的情况下解决了这个问题,看起来我的代码在这里。它真的适用于我的案例
1) Add Notification Observer in did load 1) 在 did load 中添加 Notification Observer
override func viewDidLoad() { super.viewDidLoad() setupManager() // Do any additional setup after loading the view. NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardWillShow), name: NSNotification.Name.UIKeyboardWillShow, object: nil) NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardWillHide), name: NSNotification.Name.UIKeyboardWillHide, object: nil) }
2) Remove Notification Observer like 2)删除通知观察者,如
deinit { NotificationCenter.default.removeObserver(self) }
3) Add keyboard show/ hide methods like 3)添加键盘显示/隐藏方法,如
@objc func keyboardWillShow(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue {
UIView.animate(withDuration: 0.1, animations: { () -> Void in
self.view.frame.origin.y -= keyboardSize.height
self.view.layoutIfNeeded()
})
}
}
@objc func keyboardWillHide(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue {
UIView.animate(withDuration: 0.1, animations: { () -> Void in
self.view.frame.origin.y += keyboardSize.height
self.view.layoutIfNeeded()
})
}
}
4) Add textfeild delegate and add touchesBegan methods .usefull for hide the keyboard when touch outside the textfeild on screen 4) 添加 textfeild 委托并添加 touchesBegan 方法 .usefull 用于在屏幕上的 textfeild 之外触摸时隐藏键盘
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
view.endEditing(true)
}
You can use this library and just one line of code in appDidFinishedLaunching and u are done..你可以使用这个库,在 appDidFinishedLaunching 中只需一行代码,你就完成了..
func application(application: UIApplication,didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
IQKeyboardManager.sharedManager().enable = true
return true
}
IQKeyboardManager - adjust view whenever keyboard appear link - https://github.com/hackiftekhar/IQKeyboardManager IQKeyboardManager - 每当键盘出现时调整视图链接 - https://github.com/hackiftekhar/IQKeyboardManager
This is an improved version of @JosephLord and @Hlung's answer.这是@JosephLord 和@Hlung 答案的改进版本。 It can apply whether you have tabbar or not.
无论您是否有标签栏,它都可以应用。 And it would perfectly restore view that is moved by keyboard to original position.
并且可以完美还原键盘移动到原始位置的视图。
// You have to set this up in storyboard first!.
// It's a vertical spacing constraint between view and bottom of superview.
@IBOutlet weak var bottomSpacingConstraint: NSLayoutConstraint!
override func viewDidLoad() {
super.viewDidLoad()
// Receive(Get) Notification
NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardNotification:", name: UIKeyboardWillShowNotification, object: nil)
NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardNotification:", name: UIKeyboardWillHideNotification, object: nil)
self.originalConstraint = self.keyboardHeightLayoutConstraint?.constant //for original coordinate.
}
func keyboardNotification(notification: NSNotification) {
let isShowing = notification.name == UIKeyboardWillShowNotification
var tabbarHeight: CGFloat = 0
if self.tabBarController? != nil {
tabbarHeight = self.tabBarController!.tabBar.frame.height
}
if let userInfo = notification.userInfo {
let endFrame = (userInfo[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.CGRectValue()
let duration:NSTimeInterval = (userInfo[UIKeyboardAnimationDurationUserInfoKey] as? NSNumber)?.doubleValue ?? 0
let animationCurveRawNSN = userInfo[UIKeyboardAnimationCurveUserInfoKey] as? NSNumber
let animationCurveRaw = animationCurveRawNSN?.unsignedLongValue ?? UIViewAnimationOptions.CurveEaseInOut.rawValue
let animationCurve:UIViewAnimationOptions = UIViewAnimationOptions(rawValue: animationCurveRaw)
self.keyboardHeightLayoutConstraint?.constant = isShowing ? (endFrame!.size.height - tabbarHeight) : self.originalConstraint!
UIView.animateWithDuration(duration,
delay: NSTimeInterval(0),
options: animationCurve,
animations: { self.view.layoutIfNeeded() },
completion: nil)
}
}
I created a Swift 3 protocol to handle the keyboard appearance / disappearance我创建了一个 Swift 3 协议来处理键盘的出现/消失
import UIKit
protocol KeyboardHandler: class {
var bottomConstraint: NSLayoutConstraint! { get set }
func keyboardWillShow(_ notification: Notification)
func keyboardWillHide(_ notification: Notification)
func startObservingKeyboardChanges()
func stopObservingKeyboardChanges()
}
extension KeyboardHandler where Self: UIViewController {
func startObservingKeyboardChanges() {
// NotificationCenter observers
NotificationCenter.default.addObserver(forName: NSNotification.Name.UIKeyboardWillShow, object: nil, queue: nil) { [weak self] notification in
self?.keyboardWillShow(notification)
}
// Deal with rotations
NotificationCenter.default.addObserver(forName: NSNotification.Name.UIKeyboardWillChangeFrame, object: nil, queue: nil) { [weak self] notification in
self?.keyboardWillShow(notification)
}
// Deal with keyboard change (emoji, numerical, etc.)
NotificationCenter.default.addObserver(forName: NSNotification.Name.UITextInputCurrentInputModeDidChange, object: nil, queue: nil) { [weak self] notification in
self?.keyboardWillShow(notification)
}
NotificationCenter.default.addObserver(forName: NSNotification.Name.UIKeyboardWillHide, object: nil, queue: nil) { [weak self] notification in
self?.keyboardWillHide(notification)
}
}
func keyboardWillShow(_ notification: Notification) {
let verticalPadding: CGFloat = 20 // Padding between the bottom of the view and the top of the keyboard
guard let value = notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue else { return }
let keyboardHeight = value.cgRectValue.height
// Here you could have more complex rules, like checking if the textField currently selected is actually covered by the keyboard, but that's out of this scope.
self.bottomConstraint.constant = keyboardHeight + verticalPadding
UIView.animate(withDuration: 0.1, animations: { () -> Void in
self.view.layoutIfNeeded()
})
}
func keyboardWillHide(_ notification: Notification) {
self.bottomConstraint.constant = 0
UIView.animate(withDuration: 0.1, animations: { () -> Void in
self.view.layoutIfNeeded()
})
}
func stopObservingKeyboardChanges() {
NotificationCenter.default.removeObserver(self)
}
}
Then, to implement it in a UIViewController, do the following:然后,要在 UIViewController 中实现它,请执行以下操作:
let the viewController conform to this protocol :让 viewController 遵守这个协议:
class FormMailVC: UIViewControlle, KeyboardHandler {
start observing keyboard changes in viewWillAppear:开始观察 viewWillAppear 中的键盘变化:
// MARK: - View controller life cycle override func viewWillAppear(_ animated: Bool) { super.viewWillAppear(animated) startObservingKeyboardChanges() }
stop observing keyboard changes in viewWillDisappear:停止观察 viewWillDisappear 中的键盘变化:
override func viewWillDisappear(_ animated: Bool) { super.viewWillDisappear(animated) stopObservingKeyboardChanges() }
create an IBOutlet for the bottom constraint from the storyboard:从情节提要中为底部约束创建一个 IBOutlet:
// NSLayoutConstraints @IBOutlet weak var bottomConstraint: NSLayoutConstraint!
(I recommend having all of your UI embedded inside a "contentView", and linking to this property the bottom constraint from this contentView to the bottom layout guide) (我建议将所有 UI 嵌入到“contentView”中,并将此 contentView 的底部约束链接到底部布局指南)
change the constraint priority of the top constraint to 250 (low)将顶部约束的约束优先级更改为 250(低)
This is to let the whole content view slide upwards when the keyboard appears.这是为了让整个内容视图在键盘出现时向上滑动。 The priority must be lower than any other constraint priority in the subviews, including content hugging priorities / content compression resistance priorities.
优先级必须低于子视图中的任何其他约束优先级,包括内容拥抱优先级/内容抗压缩优先级。
You may have to add a "greater than equal" constraint for this:您可能必须为此添加“大于等于”约束:
Easiest way that doesn't require any code:不需要任何代码的最简单方法:
The object will auto-move up with the keyboard, in sync.该对象将与键盘同步自动向上移动。
Such simple UIViewController
extension can be used可以使用这样简单的
UIViewController
扩展
//MARK: - Observers
extension UIViewController {
func addObserverForNotification(notificationName: String, actionBlock: (NSNotification) -> Void) {
NSNotificationCenter.defaultCenter().addObserverForName(notificationName, object: nil, queue: NSOperationQueue.mainQueue(), usingBlock: actionBlock)
}
func removeObserver(observer: AnyObject, notificationName: String) {
NSNotificationCenter.defaultCenter().removeObserver(observer, name: notificationName, object: nil)
}
}
//MARK: - Keyboard observers
extension UIViewController {
typealias KeyboardHeightClosure = (CGFloat) -> ()
func addKeyboardChangeFrameObserver(willShow willShowClosure: KeyboardHeightClosure?,
willHide willHideClosure: KeyboardHeightClosure?) {
NSNotificationCenter.defaultCenter().addObserverForName(UIKeyboardWillChangeFrameNotification,
object: nil, queue: NSOperationQueue.mainQueue(), usingBlock: { [weak self](notification) in
if let userInfo = notification.userInfo,
let frame = (userInfo[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.CGRectValue(),
let duration = userInfo[UIKeyboardAnimationDurationUserInfoKey] as? Double,
let c = userInfo[UIKeyboardAnimationCurveUserInfoKey] as? UInt,
let kFrame = self?.view.convertRect(frame, fromView: nil),
let kBounds = self?.view.bounds {
let animationType = UIViewAnimationOptions(rawValue: c)
let kHeight = kFrame.size.height
UIView.animateWithDuration(duration, delay: 0, options: animationType, animations: {
if CGRectIntersectsRect(kBounds, kFrame) { // keyboard will be shown
willShowClosure?(kHeight)
} else { // keyboard will be hidden
willHideClosure?(kHeight)
}
}, completion: nil)
} else {
print("Invalid conditions for UIKeyboardWillChangeFrameNotification")
}
})
}
func removeKeyboardObserver() {
removeObserver(self, notificationName: UIKeyboardWillChangeFrameNotification)
}
}
Example of usage使用示例
override func viewWillDisappear(animated: Bool) {
super.viewWillDisappear(animated)
removeKeyboardObserver()
}
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
addKeyboardChangeFrameObserver(willShow: { [weak self](height) in
//Update constraints here
self?.view.setNeedsUpdateConstraints()
}, willHide: { [weak self](height) in
//Reset constraints here
self?.view.setNeedsUpdateConstraints()
})
}
Swift 4 solution斯威夫特 4 解决方案
//MARK: - Observers
extension UIViewController {
func addObserverForNotification(_ notificationName: Notification.Name, actionBlock: @escaping (Notification) -> Void) {
NotificationCenter.default.addObserver(forName: notificationName, object: nil, queue: OperationQueue.main, using: actionBlock)
}
func removeObserver(_ observer: AnyObject, notificationName: Notification.Name) {
NotificationCenter.default.removeObserver(observer, name: notificationName, object: nil)
}
}
//MARK: - Keyboard handling
extension UIViewController {
typealias KeyboardHeightClosure = (CGFloat) -> ()
func addKeyboardChangeFrameObserver(willShow willShowClosure: KeyboardHeightClosure?,
willHide willHideClosure: KeyboardHeightClosure?) {
NotificationCenter.default.addObserver(forName: NSNotification.Name.UIKeyboardWillChangeFrame,
object: nil, queue: OperationQueue.main, using: { [weak self](notification) in
if let userInfo = notification.userInfo,
let frame = (userInfo[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue,
let duration = userInfo[UIKeyboardAnimationDurationUserInfoKey] as? Double,
let c = userInfo[UIKeyboardAnimationCurveUserInfoKey] as? UInt,
let kFrame = self?.view.convert(frame, from: nil),
let kBounds = self?.view.bounds {
let animationType = UIViewAnimationOptions(rawValue: c)
let kHeight = kFrame.size.height
UIView.animate(withDuration: duration, delay: 0, options: animationType, animations: {
if kBounds.intersects(kFrame) { // keyboard will be shown
willShowClosure?(kHeight)
} else { // keyboard will be hidden
willHideClosure?(kHeight)
}
}, completion: nil)
} else {
print("Invalid conditions for UIKeyboardWillChangeFrameNotification")
}
})
}
func removeKeyboardObserver() {
removeObserver(self, notificationName: NSNotification.Name.UIKeyboardWillChangeFrame)
}
}
Swift 4.2斯威夫特 4.2
//MARK: - Keyboard handling
extension UIViewController {
func addObserverForNotification(_ notificationName: Notification.Name, actionBlock: @escaping (Notification) -> Void) {
NotificationCenter.default.addObserver(forName: notificationName, object: nil, queue: OperationQueue.main, using: actionBlock)
}
func removeObserver(_ observer: AnyObject, notificationName: Notification.Name) {
NotificationCenter.default.removeObserver(observer, name: notificationName, object: nil)
}
typealias KeyboardHeightClosure = (CGFloat) -> ()
func removeKeyboardObserver() {
removeObserver(self, notificationName: UIResponder.keyboardWillChangeFrameNotification)
}
func addKeyboardChangeFrameObserver(willShow willShowClosure: KeyboardHeightClosure?,
willHide willHideClosure: KeyboardHeightClosure?) {
NotificationCenter.default.addObserver(forName: UIResponder.keyboardWillChangeFrameNotification,
object: nil, queue: OperationQueue.main, using: { [weak self](notification) in
if let userInfo = notification.userInfo,
let frame = (userInfo[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue,
let duration = userInfo[UIResponder.keyboardAnimationDurationUserInfoKey] as? Double,
let c = userInfo[UIResponder.keyboardAnimationCurveUserInfoKey] as? UInt,
let kFrame = self?.view.convert(frame, from: nil),
let kBounds = self?.view.bounds {
let animationType = UIView.AnimationOptions(rawValue: c)
let kHeight = kFrame.size.height
UIView.animate(withDuration: duration, delay: 0, options: animationType, animations: {
if kBounds.intersects(kFrame) { // keyboard will be shown
willShowClosure?(kHeight)
} else { // keyboard will be hidden
willHideClosure?(kHeight)
}
}, completion: nil)
} else {
print("Invalid conditions for UIKeyboardWillChangeFrameNotification")
}
})
}
}
struct MoveKeyboard {
static let KEYBOARD_ANIMATION_DURATION : CGFloat = 0.3
static let MINIMUM_SCROLL_FRACTION : CGFloat = 0.2;
static let MAXIMUM_SCROLL_FRACTION : CGFloat = 0.8;
static let PORTRAIT_KEYBOARD_HEIGHT : CGFloat = 216;
static let LANDSCAPE_KEYBOARD_HEIGHT : CGFloat = 162;
}
func textFieldDidBeginEditing(textField: UITextField) {
let textFieldRect : CGRect = self.view.window!.convertRect(textField.bounds, fromView: textField)
let viewRect : CGRect = self.view.window!.convertRect(self.view.bounds, fromView: self.view)
let midline : CGFloat = textFieldRect.origin.y + 0.5 * textFieldRect.size.height
let numerator : CGFloat = midline - viewRect.origin.y - MoveKeyboard.MINIMUM_SCROLL_FRACTION * viewRect.size.height
let denominator : CGFloat = (MoveKeyboard.MAXIMUM_SCROLL_FRACTION - MoveKeyboard.MINIMUM_SCROLL_FRACTION) * viewRect.size.height
var heightFraction : CGFloat = numerator / denominator
if heightFraction < 0.0 {
heightFraction = 0.0
} else if heightFraction > 1.0 {
heightFraction = 1.0
}
let orientation : UIInterfaceOrientation = UIApplication.sharedApplication().statusBarOrientation
if (orientation == UIInterfaceOrientation.Portrait || orientation == UIInterfaceOrientation.PortraitUpsideDown) {
animateDistance = floor(MoveKeyboard.PORTRAIT_KEYBOARD_HEIGHT * heightFraction)
} else {
animateDistance = floor(MoveKeyboard.LANDSCAPE_KEYBOARD_HEIGHT * heightFraction)
}
var viewFrame : CGRect = self.view.frame
viewFrame.origin.y -= animateDistance
UIView.beginAnimations(nil, context: nil)
UIView.setAnimationBeginsFromCurrentState(true)
UIView.setAnimationDuration(NSTimeInterval(MoveKeyboard.KEYBOARD_ANIMATION_DURATION))
self.view.frame = viewFrame
UIView.commitAnimations()
}
func textFieldDidEndEditing(textField: UITextField) {
var viewFrame : CGRect = self.view.frame
viewFrame.origin.y += animateDistance
UIView.beginAnimations(nil, context: nil)
UIView.setAnimationBeginsFromCurrentState(true)
UIView.setAnimationDuration(NSTimeInterval(MoveKeyboard.KEYBOARD_ANIMATION_DURATION))
self.view.frame = viewFrame
UIView.commitAnimations()
}
And Lastly since we are using delegates methods最后因为我们使用的是委托方法
func textFieldShouldReturn(textField: UITextField) -> Bool {
textField.resignFirstResponder()
return true
}
refactored from using objective-c http://www.cocoawithlove.com/2008/10/sliding-uitextfields-around-to-avoid.html从使用objective-c重构http://www.cocoawithlove.com/2008/10/sliding-uitextfields-around-to-avoid.html
Another solution that doesn't depend on autolayout, constraints or any outlets.另一种不依赖于自动布局、约束或任何出口的解决方案。 What you do need is your field(s) in a scrollview.
您需要的是滚动视图中的字段。
override func viewDidLoad() {
super.viewDidLoad()
NSNotificationCenter.defaultCenter().addObserver(self, selector: "makeSpaceForKeyboard:", name: UIKeyboardWillShowNotification, object: nil)
NSNotificationCenter.defaultCenter().addObserver(self, selector: "makeSpaceForKeyboard:", name: UIKeyboardWillHideNotification, object: nil)
}
func makeSpaceForKeyboard(notification: NSNotification) {
let info = notification.userInfo!
let keyboardHeight:CGFloat = (info[UIKeyboardFrameEndUserInfoKey] as! NSValue).CGRectValue().size.height
let duration:Double = info[UIKeyboardAnimationDurationUserInfoKey] as! Double
if notification.name == UIKeyboardWillShowNotification {
UIView.animateWithDuration(duration, animations: { () -> Void in
var frame = self.view.frame
frame.size.height = frame.size.height - keyboardHeight
self.view.frame = frame
})
} else {
UIView.animateWithDuration(duration, animations: { () -> Void in
var frame = self.view.frame
frame.size.height = frame.size.height + keyboardHeight
self.view.frame = frame
})
}
}
Here is my version for a solution for Swift 2.2:这是我的 Swift 2.2 解决方案版本:
First register for Keyboard Show/Hide Notifications首先注册键盘显示/隐藏通知
NSNotificationCenter.defaultCenter().addObserver(self,
selector: #selector(MessageThreadVC.keyboardWillShow(_:)),
name: UIKeyboardWillShowNotification,
object: nil)
NSNotificationCenter.defaultCenter().addObserver(self,
selector: #selector(MessageThreadVC.keyboardWillHide(_:)),
name: UIKeyboardWillHideNotification,
object: nil)
Then in methods coresponding for those notifications move the main view up or down然后在对应于这些通知的方法中向上或向下移动主视图
func keyboardWillShow(sender: NSNotification) {
if let keyboardSize = (sender.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.CGRectValue() {
self.view.frame.origin.y = -keyboardSize.height
}
}
func keyboardWillHide(sender: NSNotification) {
self.view.frame.origin.y = 0
}
The trick is in the "keyboardWillShow" part which get calls every time "QuickType Suggestion Bar" is expanded or collapsed.诀窍在于“keyboardWillShow”部分,每次展开或折叠“QuickType Suggestion Bar”时都会调用该部分。 Then we always set the y coordinate of the main view which equals the negative value of total keyboard height (with or without the "QuickType bar" portion).
然后我们总是设置主视图的 y 坐标,它等于键盘总高度的负值(有或没有“QuickType bar”部分)。
At the end do not forget to remove observers最后不要忘记移除观察者
deinit {
NSNotificationCenter.defaultCenter().removeObserver(self)
}
A Swift 5
solution forfrédéric-adda : frédéric-adda 的
Swift 5
解决方案:
protocol KeyboardHandler: class {
var bottomConstraint: NSLayoutConstraint! { get set }
func keyboardWillShow(_ notification: Notification)
func keyboardWillHide(_ notification: Notification)
func startObservingKeyboardChanges()
func stopObservingKeyboardChanges()
}
extension KeyboardHandler where Self: UIViewController {
func startObservingKeyboardChanges() {
// NotificationCenter observers
NotificationCenter.default.addObserver(forName: UIResponder.keyboardWillShowNotification, object: nil, queue: nil) { [weak self] notification in
self?.keyboardWillShow(notification)
}
// Deal with rotations
NotificationCenter.default.addObserver(forName: UIResponder.keyboardWillChangeFrameNotification, object: nil, queue: nil) { [weak self] notification in
self?.keyboardWillShow(notification)
}
// Deal with keyboard change (emoji, numerical, etc.)
NotificationCenter.default.addObserver(forName: UITextInputMode.currentInputModeDidChangeNotification, object: nil, queue: nil) { [weak self] notification in
self?.keyboardWillShow(notification)
}
NotificationCenter.default.addObserver(forName: UIResponder.keyboardWillHideNotification, object: nil, queue: nil) { [weak self] notification in
self?.keyboardWillHide(notification)
}
}
func keyboardWillShow(_ notification: Notification) {
let verticalPadding: CGFloat = 20 // Padding between the bottom of the view and the top of the keyboard
guard let value = notification.userInfo?[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue else { return }
let keyboardHeight = value.cgRectValue.height
// Here you could have more complex rules, like checking if the textField currently selected is actually covered by the keyboard, but that's out of this scope.
self.bottomConstraint.constant = keyboardHeight + verticalPadding
UIView.animate(withDuration: 0.1, animations: { () -> Void in
self.view.layoutIfNeeded()
})
}
func keyboardWillHide(_ notification: Notification) {
self.bottomConstraint.constant = 0
UIView.animate(withDuration: 0.1, animations: { () -> Void in
self.view.layoutIfNeeded()
})
}
func stopObservingKeyboardChanges() {
NotificationCenter.default.removeObserver(self)
}
}
In any UIViewController
:在任何
UIViewController
:
KeyboardHandler
protocolKeyboardHandler
协议extension AnyViewController: KeyboardHandler {}
@IBOutlet var bottomConstraint: NSLayoutConstraint!
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
startObservingKeyboardChanges()
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
stopObservingKeyboardChanges()
}
Enjoy!享受!
The following is a simple solution, whereby the text field has a constraint tying it to the bottom layout guide.以下是一个简单的解决方案,其中文本字段具有将其绑定到底部布局指南的约束。 It simply adds the keyboard height to the constraint's constant.
它只是将键盘高度添加到约束的常量中。
// This constraint ties the text field to the bottom layout guide
@IBOutlet var textFieldToBottomLayoutGuideConstraint: NSLayoutConstraint!
override func viewDidLoad() {
super.viewDidLoad()
NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillShow:", name:UIKeyboardWillShowNotification, object: nil);
NSNotificationCenter.defaultCenter().addObserver(self, selector: "keyboardWillHide:", name:UIKeyboardWillHideNotification, object: nil);
}
func keyboardWillShow(sender: NSNotification) {
if let keyboardSize = (sender.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue() {
self.textFieldToBottomLayoutGuideConstraint?.constant += keyboardSize.height
}
}
func keyboardWillHide(sender: NSNotification) {
if let keyboardSize = (sender.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue() {
self.textFieldToBottomLayoutGuideConstraint?.constant -= keyboardSize.height
}
}
Well, I think i might be too late but i found another simple version of Saqib's answer.好吧,我想我可能为时已晚,但我找到了 Saqib 答案的另一个简单版本。 I'm using Autolayout with constraints.
我正在使用带有约束的自动布局。 I have a small view inside of another main view with username and password fields.
我在另一个带有用户名和密码字段的主视图中有一个小视图。 Instead of changing the y coordinate of the view i'm saving the original constraint value in a variable and changing the constraint's constant to some value and again after the keyboard dismisses, i'm setting up the constraint to original one.
我没有更改视图的 y 坐标,而是将原始约束值保存在变量中,并将约束的常量更改为某个值,然后在键盘关闭后再次将约束设置为原始值。 This way it avoids the problem Saqib's answer has, (The view keeps on moving up and does not stop).
这样就避免了 Saqib 的答案所存在的问题(视图不断向上移动,不会停止)。 Below is my code...
下面是我的代码...
override func viewDidLoad() {
super.viewDidLoad()
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillShow:"), name:UIKeyboardWillShowNotification, object: nil);
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillHide:"), name:UIKeyboardWillHideNotification, object: nil);
self.originalConstraint = self.centerYConstraint.constant
}
func keyboardWillShow(sender: NSNotification) {
self.centerYConstraint.constant += 30
}
func keyboardWillHide(sender: NSNotification) {
self.centerYConstraint.constant = self.originalConstraint
}
Swift 4.x answer, merging answers from @Joseph Lord and @Isuru. Swift 4.x 答案,合并了@Joseph Lord 和@Isuru 的答案。
bottomConstraint
represents the bottom constraint of the view you're interested in moving. bottomConstraint
表示您有兴趣移动的视图的底部约束。
override func viewDidLoad() {
// Call super
super.viewDidLoad()
// Subscribe to keyboard notifications
NotificationCenter.default.addObserver(self,
selector: #selector(keyboardNotification(notification:)),
name: UIResponder.keyboardWillChangeFrameNotification,
object: nil)
}
deinit {
NotificationCenter.default.removeObserver(self)
}
@objc func keyboardNotification(notification: NSNotification) {
if let userInfo = notification.userInfo {
// Get keyboard frame
let keyboardFrame = (userInfo[UIResponder.keyboardFrameEndUserInfoKey] as! NSValue).cgRectValue
// Set new bottom constraint constant
let bottomConstraintConstant = keyboardFrame.origin.y >= UIScreen.main.bounds.size.height ? 0.0 : keyboardFrame.size.height
// Set animation properties
let duration = (userInfo[UIResponder.keyboardAnimationDurationUserInfoKey] as? NSNumber)?.doubleValue ?? 0
let animationCurveRawNSN = userInfo[UIResponder.keyboardAnimationCurveUserInfoKey] as? NSNumber
let animationCurveRaw = animationCurveRawNSN?.uintValue ?? UIView.AnimationOptions.curveEaseInOut.rawValue
let animationCurve = UIView.AnimationOptions(rawValue: animationCurveRaw)
// Animate the view you care about
UIView.animate(withDuration: duration, delay: 0, options: animationCurve, animations: {
self.bottomConstraint.constant = bottomConstraintConstant
self.view.layoutIfNeeded()
}, completion: nil)
}
}
Very Simple and no need to code more.非常简单,无需编写更多代码。 Just add
pod 'IQKeyboardManagerSwift'
in your podfile, and in your AppDelegate
page add code below.只需在您的 podfile 中添加
pod 'IQKeyboardManagerSwift'
,并在您的AppDelegate
页面中添加下面的代码。
import IQKeyboardManagerSwift
and in method didFinishLaunchingWithOptions()
type并在方法
didFinishLaunchingWithOptions()
类型
IQKeyboardManager.shared.enable = true
that is it.这就对了。 check this video link for better understanding https://youtu.be/eOM94K1ZWN8 Hope this will help you.
查看此视频链接以更好地了解https://youtu.be/eOM94K1ZWN8希望这对您有所帮助。
Complete code for managing keyboard.用于管理键盘的完整代码。
override func viewWillAppear(_ animated: Bool) {
NotificationCenter.default.addObserver(self, selector: #selector(StoryMediaVC.keyboardWillShow), name: UIResponder.keyboardWillShowNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(StoryMediaVC.keyboardWillHide), name: UIResponder.keyboardWillHideNotification, object: nil)
}
override func viewWillDisappear(_ animated: Bool) {
NotificationCenter.default.removeObserver(self, name: UIResponder.keyboardWillShowNotification, object: nil)
NotificationCenter.default.removeObserver(self, name: UIResponder.keyboardWillHideNotification, object: nil)
}
@objc func keyboardWillShow(notification: NSNotification) {
guard let userInfo = notification.userInfo else {return}
guard let keyboardSize = userInfo[UIResponder.keyboardFrameEndUserInfoKey] as? NSValue else {return}
let keyboardFrame = keyboardSize.cgRectValue
if self.view.bounds.origin.y == 0{
self.view.bounds.origin.y += keyboardFrame.height
}
}
@objc func keyboardWillHide(notification: NSNotification) {
if self.view.bounds.origin.y != 0 {
self.view.bounds.origin.y = 0
}
}
This is useful when textfield superview is view这在文本字段超级视图是视图时很有用
class AdminLoginViewController: UIViewController,
UITextFieldDelegate{
@IBOutlet weak var txtUserName: UITextField!
@IBOutlet weak var txtUserPassword: UITextField!
@IBOutlet weak var btnAdminLogin: UIButton!
private var activeField : UIView?
var param:String!
var adminUser : Admin? = nil
var kbHeight: CGFloat!
override func viewDidLoad()
{
self.addKeyBoardObserver()
self.addGestureForHideKeyBoard()
}
override func viewWillDisappear(animated: Bool) {
super.viewWillDisappear(animated)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
func addGestureForHideKeyBoard()
{
let tapGesture = UITapGestureRecognizer(target: self, action: Selector("hideKeyboard"))
tapGesture.cancelsTouchesInView = false
view.addGestureRecognizer(tapGesture)
}
func hideKeyboard() {
self.view.endEditing(true)
}
func addKeyBoardObserver(){
NSNotificationCenter.defaultCenter().addObserver(self, selector: "willChangeKeyboardFrame:",
name:UIKeyboardWillShowNotification, object: nil)
NSNotificationCenter.defaultCenter().addObserver(self, selector: "willChangeKeyboardFrame:",
name:UIKeyboardWillHideNotification, object: nil)
}
func removeObserver(){
NSNotificationCenter.defaultCenter().removeObserver(self)
}
//MARK:- textfiled Delegate
func textFieldShouldBeginEditing(textField: UITextField) -> Bool
{
activeField = textField
return true
}
func textFieldShouldEndEditing(textField: UITextField) -> Bool
{
if activeField == textField
{
activeField = nil
}
return true
}
func textFieldShouldReturn(textField: UITextField) -> Bool {
if txtUserName == textField
{
txtUserPassword.becomeFirstResponder()
}
else if (textField == txtUserPassword)
{
self.btnAdminLoginAction(nil)
}
return true;
}
func willChangeKeyboardFrame(aNotification : NSNotification)
{
if self.activeField != nil && self.activeField!.isFirstResponder()
{
if let keyboardSize = (aNotification.userInfo![UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue()
{
let dy = (self.activeField?.superview?.convertRect((self.activeField?.frame)!, toView: view).origin.y)!
let height = (self.view.frame.size.height - keyboardSize.size.height)
if dy > height
{
var frame = self.view.frame
frame.origin.y = -((dy - height) + (self.activeField?.frame.size.height)! + 20)
self.view.frame = frame
}
}
}
else
{
var frame = self.view.frame
frame.origin.y = 0
self.view.frame = frame
}
} }
func registerForKeyboardNotifications(){
//Keyboard
NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(keyboardWasShown), name: UIKeyboardDidShowNotification, object: nil)
NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(keyboardWillBeHidden), name: UIKeyboardDidHideNotification, object: nil)
}
func deregisterFromKeyboardNotifications(){
NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillShowNotification, object: nil)
NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillHideNotification, object: nil)
}
func keyboardWasShown(notification: NSNotification){
let userInfo: NSDictionary = notification.userInfo!
let keyboardInfoFrame = userInfo.objectForKey(UIKeyboardFrameEndUserInfoKey)?.CGRectValue()
let windowFrame:CGRect = (UIApplication.sharedApplication().keyWindow!.convertRect(self.view.frame, fromView:self.view))
let keyboardFrame = CGRectIntersection(windowFrame, keyboardInfoFrame!)
let coveredFrame = UIApplication.sharedApplication().keyWindow!.convertRect(keyboardFrame, toView:self.view)
let contentInsets = UIEdgeInsetsMake(0, 0, (coveredFrame.size.height), 0.0)
self.scrollViewInAddCase .contentInset = contentInsets;
self.scrollViewInAddCase.scrollIndicatorInsets = contentInsets;
self.scrollViewInAddCase.contentSize = CGSizeMake((self.scrollViewInAddCase.contentSize.width), (self.scrollViewInAddCase.contentSize.height))
}
/**
this method will fire when keyboard was hidden
- parameter notification: contains keyboard details
*/
func keyboardWillBeHidden (notification: NSNotification) {
self.scrollViewInAddCase.contentInset = UIEdgeInsetsZero
self.scrollViewInAddCase.scrollIndicatorInsets = UIEdgeInsetsZero
}
For anyone not using storyboards to set the layout constraint.对于不使用故事板来设置布局约束的任何人。 This is a pure programmatic way to get it working on Swift 5:
这是一种使其在 Swift 5 上运行的纯编程方式:
var discussionsMessageBoxBottomAnchor: NSLayoutConstraint = NSLayoutConstraint()
discussionsMessageBox
.discussionsMessageBox
。 Also, add the listener for keyboard events. For correctly initializing the constraint, you need to first add the subview and then define the constraint.为了正确初始化约束,您需要先添加子视图,然后定义约束。
NotificationCenter.default.addObserver(self,
selector: #selector(self.keyboardNotification(notification:)),
name: NSNotification.Name.UIKeyboardWillChangeFrame,
object: nil)
view.addSubview(discussionsMessageBox)
if #available(iOS 11.0, *) {
discussionsMessageBoxBottomAnchor = discussionsMessageBox.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor, constant: 0)
} else {
// Fallback on earlier versions
discussionsMessageBoxBottomAnchor = discussionsMessageBox.bottomAnchor.constraint(equalTo: view.bottomAnchor, constant: 0)
}
NSLayoutConstraint.activate([ discussionsMessageBoxBottomAnchor ])
deinit
.deinit
。deinit {
NotificationCenter.default.removeObserver(self)
}
extension DiscussionsViewController {
@objc func keyboardNotification(notification: NSNotification) {
guard let userInfo = notification.userInfo else { return }
let endFrame = (userInfo[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue
let endFrameY = endFrame?.origin.y ?? 0
let duration:TimeInterval = (userInfo[UIKeyboardAnimationDurationUserInfoKey] as? NSNumber)?.doubleValue ?? 0
let animationCurveRawNSN = userInfo[UIKeyboardAnimationCurveUserInfoKey] as? NSNumber
let animationCurveRaw = animationCurveRawNSN?.uintValue ?? UIView.AnimationOptions.curveEaseInOut.rawValue
let animationCurve:UIView.AnimationOptions = UIView.AnimationOptions(rawValue: animationCurveRaw)
if endFrameY >= UIScreen.main.bounds.size.height {
self.discussionsMessageBoxBottomAnchor.constant = 0.0
} else {
//Changed line
self.discussionsMessageBoxBottomAnchor.constant = -1 * (endFrame?.size.height ?? 0.0)
}
UIView.animate(
withDuration: duration,
delay: TimeInterval(0),
options: animationCurve,
animations: { self.view.layoutIfNeeded() },
completion: nil)
}
}
I have done in following manner :我已按以下方式完成:
class SignInController: UIViewController , UITextFieldDelegate {
@IBOutlet weak var scrollView: UIScrollView!
// outlet declartion
@IBOutlet weak var signInTextView: UITextField!
var kbHeight: CGFloat!
/**
*
* @method viewDidLoad
*
*/
override func viewDidLoad() {
super.viewDidLoad()
self.signInTextView.delegate = self
}// end viewDidLoad
/**
*
* @method viewWillAppear
*
*/
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillShow:"), name: UIKeyboardWillShowNotification, object: nil)
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillHide:"), name: UIKeyboardWillHideNotification, object: nil)
}// end viewWillAppear
/**
*
* @method viewDidAppear
*
*/
override func viewDidAppear(animated: Bool) {
super.viewDidAppear(animated)
}// end viewDidAppear
/**
*
* @method viewWillDisappear
*
*/
override func viewWillDisappear(animated: Bool) {
super.viewWillDisappear(animated)
NSNotificationCenter.defaultCenter().removeObserver(self)
}
/**
*
* @method textFieldShouldReturn
* retun the keyboard value
*
*/
// MARK -
func textFieldShouldReturn(textField: UITextField) -> Bool {
signInTextView.resignFirstResponder()
return true;
}// end textFieldShouldReturn
// MARK - keyboardWillShow
func keyboardWillShow(notification: NSNotification) {
if let userInfo = notification.userInfo {
if let keyboardSize = (userInfo[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue() {
kbHeight = keyboardSize.height
self.animateTextField(true)
}
}
}// end keyboardWillShow
// MARK - keyboardWillHide
func keyboardWillHide(notification: NSNotification) {
self.animateTextField(false)
}// end keyboardWillHide
// MARK - animateTextField
func animateTextField(up: Bool) {
var movement = (up ? -kbHeight : kbHeight)
UIView.animateWithDuration(0.3, animations: {
self.view.frame = CGRectOffset(self.view.frame, 0, movement)
})
}// end animateTextField
/**
*
* @method didReceiveMemoryWarning
*
*/
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}// end didReceiveMemoryWarning
}// end SignInController
If you are like me who has tried all the above solutions and still your problem is not solved, I have a got a great solution for you that works like a charm.如果您像我一样尝试了上述所有解决方案,但仍然没有解决您的问题,那么我为您提供了一个很好的解决方案,效果非常好。 First I want clarify few things about some of solutions mentioned above.
首先,我想澄清一些关于上述一些解决方案的事情。
Here is a generic solution for all TextField Steps -这是所有 TextField 步骤的通用解决方案 -
1) Create a common ViewController that is extended by other ViewControllers 1)创建一个通用的ViewController,由其他ViewControllers扩展
override func viewDidLoad() {
super.viewDidLoad()
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow), name: UIResponder.keyboardWillShowNotification, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide), name: UIResponder.keyboardWillHideNotification, object: nil)
}
@objc func keyboardWillShow(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIResponder.keyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue {
if self.view.frame.origin.y == 0 {
self.view.frame.origin.y -= getMoveableDistance(keyboarHeight: keyboardSize.height)
}
}
}
@objc func keyboardWillHide(notification: NSNotification) {
if self.view.frame.origin.y != 0 {
self.view.frame.origin.y = 0
}
}
deinit {
NotificationCenter.default.removeObserver(self)
}
//get the distance to move up the main view for the focus textfiled
func getMoveableDistance(keyboarHeight : CGFloat) -> CGFloat{
var y:CGFloat = 0.0
if let activeTF = getSelectedTextField(){
var tfMaxY = activeTF.frame.maxY
var containerView = activeTF.superview!
while containerView.frame.maxY != self.view.frame.maxY{
let contViewFrm = containerView.convert(activeTF.frame, to: containerView.superview)
tfMaxY = tfMaxY + contViewFrm.minY
containerView = containerView.superview!
}
let keyboardMinY = self.view.frame.height - keyboarHeight
if tfMaxY > keyboardMinY{
y = (tfMaxY - keyboardMinY) + 10.0
}
}
return y
}
2) Create a extension of UIViewController and the currently active TextField 2) 创建 UIViewController 的扩展和当前活动的 TextField
//get active text field
extension UIViewController { func getSelectedTextField() -> UITextField?扩展 UIViewController { func getSelectedTextField() -> UITextField? {
{
let totalTextFields = getTextFieldsInView(view: self.view)
for textField in totalTextFields{
if textField.isFirstResponder{
return textField
}
}
return nil
}
func getTextFieldsInView(view: UIView) -> [UITextField] {
var totalTextFields = [UITextField]()
for subview in view.subviews as [UIView] {
if let textField = subview as? UITextField {
totalTextFields += [textField]
} else {
totalTextFields += getTextFieldsInView(view: subview)
}
}
return totalTextFields
}
} }
Extremely easy to install Swift or Objective-C.非常容易安装 Swift 或 Objective-C。
For Swift 4 And 5 and Other Update Version适用于 Swift 4 和 5 以及其他更新版本
Here how it works:这是它的工作原理:
IQKeyboardManager (Swift):- IQKeyboardManagerSwift is available through Cocoapods, to install it simply add the following line to your Podfile: IQKeyboardManager (Swift):- IQKeyboardManagerSwift 可通过 Cocoapods 获得,只需将以下行添加到您的 Podfile 中即可安装它:
pod 'IQKeyboardManagerSwift'
In AppDelegate.swift, just import IQKeyboardManagerSwift framework and enable IQKeyboardManager.在 AppDelegate.swift 中,只需导入 IQKeyboardManagerSwift 框架并启用 IQKeyboardManager。
import IQKeyboardManagerSwift
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
IQKeyboardManager.sharedManager().enable = true
IQKeyboardManager.shared.enable = true
return true
}
}
I modified @Simpa solution a little bit.........我稍微修改了@Simpa 解决方案.........
override func viewDidLoad()
{
super.viewDidLoad()
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("makeSpaceForKeyboard:"), name:UIKeyboardWillShowNotification, object: nil);
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("makeSpaceForKeyboard:"), name:UIKeyboardWillHideNotification, object: nil);
}
deinit{
NSNotificationCenter.defaultCenter().removeObserver(self)
}
var keyboardIsVisible = false
override func makeSpaceForKeyboard(notification: NSNotification) {
let info = notification.userInfo!
let keyboardHeight:CGFloat = (info[UIKeyboardFrameEndUserInfoKey] as! NSValue).CGRectValue().size.height
let duration:Double = info[UIKeyboardAnimationDurationUserInfoKey] as! Double
if notification.name == UIKeyboardWillShowNotification && keyboardIsVisible == false{
keyboardIsVisible = true
UIView.animateWithDuration(duration, animations: { () -> Void in
var frame = self.view.frame
frame.size.height = frame.size.height - keyboardHeight
self.view.frame = frame
})
} else if keyboardIsVisible == true && notification.name == UIKeyboardWillShowNotification{
}else {
keyboardIsVisible = false
UIView.animateWithDuration(duration, animations: { () -> Void in
var frame = self.view.frame
frame.size.height = frame.size.height + keyboardHeight
self.view.frame = frame
})
}
}
None of them worked for and I ended up using content insets to move my view up when the keyboard appears.它们都不起作用,当键盘出现时,我最终使用内容插入来向上移动我的视图。
Note: I was using a UITableView注意:我使用的是 UITableView
Referenced solution @ keyboard-content-offset which was entirely written in objective C, the below solution is clean Swift.引用的解决方案@ keyboard-content-offset完全用目标 C 编写,下面的解决方案是干净的 Swift。
Add the notification observer @ viewDidLoad()添加通知观察者@viewDidLoad()
NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(yourClass.keyboardWillBeShown), name:UIKeyboardWillShowNotification, object: nil);
NSNotificationCenter.defaultCenter().addObserver(self, selector: #selector(yourClass.keyboardWillBeHidden), name:UIKeyboardWillHideNotification, object: nil);
To get the keyboard size, we first get the userInfo dictionary from the notification object, which stores any additional objects that our receiver might use.要获取键盘大小,我们首先从通知对象中获取 userInfo 字典,该字典存储我们的接收器可能使用的任何其他对象。
From that dictionary we can get the CGRect object describing the keyboard's frame by using the key UIKeyboardFrameBeginUserInfoKey.从该字典中,我们可以通过使用键 UIKeyboardFrameBeginUserInfoKey 获得描述键盘框架的 CGRect 对象。
Apply the content inset for the table view @ keyboardWillBeShown method,为表格视图@keyboardWillBeShown 方法应用内容插入,
func keyboardWillBeShown(sender: NSNotification)
{
// Move the table view
if let keyboardSize = (sender.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.CGRectValue()
{
let contentInsets = UIEdgeInsetsMake(0.0, 0.0, (keyboardSize.height), 0.0);
yourTableView.contentInset = contentInsets;
yourTableView.scrollIndicatorInsets = contentInsets;
}
}
Restore the view @ keyboardWillBeHidden method恢复视图@keyboardWillBeHidden 方法
func keyboardWillBeHidden(sender: NSNotification)
{
// Moving back the table view back to the default position
yourTableView.contentInset = UIEdgeInsetsZero;
yourTableView.scrollIndicatorInsets = UIEdgeInsetsZero;
}
If you want to keep the device orientation also into consideration, use conditional statements to tailor the code to your needs.如果您还想考虑设备方向,请使用条件语句根据您的需要定制代码。
// Portrait
UIEdgeInsetsMake(0.0, 0.0, (keyboardSize.height), 0.0);
// Landscape
UIEdgeInsetsMake(0.0, 0.0, (keyboardSize.width), 0.0);
I'm using Swift for programing with iOS and I'm using this code to move the UITextField
, but it does not work.我正在使用Swift进行iOS编程,并且正在使用此代码移动
UITextField
,但是它不起作用。 I call the function keyboardWillShow
correctly, but the textfield doesn't move.我正确地调用了功能
keyboardWillShow
,但是文本字段没有移动。 I'm using autolayout.我正在使用自动版式。
override func viewDidLoad() {
super.viewDidLoad()
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillShow:"), name:UIKeyboardWillShowNotification, object: nil);
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillHide:"), name:UIKeyboardWillHideNotification, object: nil);
}
deinit {
NSNotificationCenter.defaultCenter().removeObserver(self);
}
func keyboardWillShow(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue() {
//let contentInsets = UIEdgeInsets(top: 0, left: 0, bottom: keyboardSize.height, right: 0)
var frame = self.ChatField.frame
frame.origin.y = frame.origin.y - keyboardSize.height + 167
self.chatField.frame = frame
println("asdasd")
}
}
The Swift 4 solution I use, takes in keyboard size. 我使用的Swift 4解决方案采用键盘尺寸。 Replace
serverStatusStackView
with whatever view you care about, eg: self.view
: 用您关心的任何视图替换
serverStatusStackView
,例如: self.view
:
deinit {
NotificationCenter.default.removeObserver(self)
}
@objc func keyboardWillShow(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue {
serverStatusStackView.frame.origin.y = keyboardSize.height * 2 - serverStatusStackView.frame.height
}
}
@objc func keyboardWillHide(notification: NSNotification) {
if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue {
serverStatusStackView.frame.origin.y += keyboardSize.height
}
}
override func viewDidLoad() {
super.viewDidLoad()
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow(notification:)), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide(notification:)), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
}
The best way is using NotificationCenter to catch keyboard actions. 最好的方法是使用NotificationCenter捕获键盘操作。 You can follow the steps in this short article https://medium.com/@demirciy/keyboard-handling-deb1a96a8207
您可以按照此简短文章中的步骤进行操作https://medium.com/@demirciy/keyboard-handling-deb1a96a8207
Swift 4.1, Swift 4.1,
Use TPKeyBoardAvoiding class for achieving this. 使用TPKeyBoardAvoiding类可实现此目的。 This works fine with UIScrollView , UICollectionView , UITableView .
与UIScrollView , UICollectionView , UITableView一起使用时效果很好。
Just assign this class to your scrollview, collectionview or tableview in storyboard or create its object programmatically. 只需将此类分配给情节提要中的滚动视图,集合视图或表视图,或以编程方式创建其对象。 All textfield or textviews inside TPKeyboardAvoiding scrollview will adjust automatically when the keyboard appears and disappears.
当键盘出现和消失时, TPKeyboardAvoiding滚动视图中的所有文本字段或文本视图都会自动调整。
Here is the link for TPKeyboardAvoiding 这是TPKeyboardAvoiding的链接
TPKeyboardAvoiding for Swift 4.1, TPKeyboardAvoid用于Swift 4.1,
import Foundation
import UIKit
// MARK: - TableView
class TPKeyboardAvoidingTableView:UITableView,UITextFieldDelegate, UITextViewDelegate {
override var frame:CGRect{
willSet{
super.frame = frame
}
didSet{
if hasAutomaticKeyboardAvoidingBehaviour() {return}
TPKeyboardAvoiding_updateContentInset()
}
}
override var contentSize:CGSize{
willSet(newValue){
if hasAutomaticKeyboardAvoidingBehaviour() {
super.contentSize = newValue
return
}
if newValue.equalTo(self.contentSize)
{
return
}
super.contentSize = newValue
self.TPKeyboardAvoiding_updateContentInset()
}
// didSet{
// self.TPKeyboardAvoiding_updateContentInset()
// }
}
override init(frame: CGRect, style: UITableViewStyle) {
super.init(frame: frame, style: style)
self.setup()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
self.setup()
}
override func awakeFromNib() {
setup()
}
deinit{
NotificationCenter.default.removeObserver(self)
}
func hasAutomaticKeyboardAvoidingBehaviour()->Bool
{
if #available(iOS 8.3, *) {
if self.delegate is UITableViewController
{
return true
}
}
return false
}
func focusNextTextField()->Bool
{
return self.TPKeyboardAvoiding_focusNextTextField()
}
@objc func scrollToActiveTextField()
{
return self.TPKeyboardAvoiding_scrollToActiveTextField()
}
override func willMove(toSuperview newSuperview: UIView?) {
super.willMove(toSuperview: newSuperview)
if newSuperview != nil {
NSObject.cancelPreviousPerformRequests(withTarget: self, selector: #selector(TPKeyboardAvoiding_assignTextDelegateForViewsBeneathView(_:)), object: self)
}
}
override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
self.TPKeyboardAvoiding_findFirstResponderBeneathView(self)?.resignFirstResponder()
super.touchesEnded(touches, with: event)
}
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
if !self.focusNextTextField()
{
textField.resignFirstResponder()
}
return true
}
override func layoutSubviews() {
super.layoutSubviews()
NSObject.cancelPreviousPerformRequests(withTarget: self, selector: #selector(TPKeyboardAvoiding_assignTextDelegateForViewsBeneathView(_:)), object: self)
Timer.scheduledTimer(timeInterval: 0.1, target: self, selector: #selector(TPKeyboardAvoiding_assignTextDelegateForViewsBeneathView(_:)), userInfo: nil, repeats: false)
}
}
private extension TPKeyboardAvoidingTableView
{
func setup()
{
if self.hasAutomaticKeyboardAvoidingBehaviour() { return }
NotificationCenter.default.addObserver(self,
selector: #selector(TPKeyboardAvoiding_keyboardWillShow(_:)),
name: NSNotification.Name.UIKeyboardWillChangeFrame,
object: nil)
NotificationCenter.default.addObserver(self,
selector: #selector(TPKeyboardAvoiding_keyboardWillHide(_:)),
name: NSNotification.Name.UIKeyboardWillHide,
object: nil)
NotificationCenter.default.addObserver(self,
selector: #selector(scrollToActiveTextField),
name: NSNotification.Name.UITextViewTextDidBeginEditing,
object: nil)
NotificationCenter.default.addObserver(self,
selector: #selector(scrollToActiveTextField),
name: NSNotification.Name.UITextFieldTextDidBeginEditing,
object: nil)
}
}
// MARK: - CollectionView
class TPKeyboardAvoidingCollectionView:UICollectionView,UITextViewDelegate {
override var contentSize:CGSize{
willSet(newValue){
if newValue.equalTo(self.contentSize)
{
return
}
super.contentSize = newValue
self.TPKeyboardAvoiding_updateContentInset()
}
// didSet{
// self.TPKeyboardAvoiding_updateContentInset()
// }
}
override var frame:CGRect{
willSet{
super.frame = frame
}
didSet{
self.TPKeyboardAvoiding_updateContentInset()
}
}
// override init(frame: CGRect) {
// super.init(frame: frame)
// }
override init(frame: CGRect, collectionViewLayout layout: UICollectionViewLayout) {
super.init(frame: frame, collectionViewLayout: layout)
setup()
}
required init?(coder aDecoder: NSCoder) {
// fatalError("init(coder:) has not been implemented")
super.init(coder: aDecoder)
self.setup()
}
override func awakeFromNib() {
setup()
}
deinit{
NotificationCenter.default.removeObserver(self)
}
func focusNextTextField()->Bool
{
return self.TPKeyboardAvoiding_focusNextTextField()
}
@objc func scrollToActiveTextField()
{
return self.TPKeyboardAvoiding_scrollToActiveTextField()
}
override func willMove(toSuperview newSuperview: UIView?) {
super.willMove(toSuperview: newSuperview)
if newSuperview != nil {
NSObject.cancelPreviousPerformRequests(withTarget: self, selector: #selector(TPKeyboardAvoiding_assignTextDelegateForViewsBeneathView(_:)), object: self)
}
}
override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
self.TPKeyboardAvoiding_findFirstResponderBeneathView(self)?.resignFirstResponder()
super.touchesEnded(touches, with: event)
}
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
if !self.focusNextTextField()
{
textField.resignFirstResponder()
}
return true
}
override func layoutSubviews() {
super.layoutSubviews()
NSObject.cancelPreviousPerformRequests(withTarget: self, selector: #selector(TPKeyboardAvoiding_assignTextDelegateForViewsBeneathView(_:)), object: self)
Timer.scheduledTimer(timeInterval: 0.1, target: self, selector: #selector(TPKeyboardAvoiding_assignTextDelegateForViewsBeneathView(_:)), userInfo: nil, repeats: false)
}
}
private extension TPKeyboardAvoidingCollectionView
{
func setup()
{
NotificationCenter.default.addObserver(self,
selector: #selector(TPKeyboardAvoiding_keyboardWillShow(_:)),
name: NSNotification.Name.UIKeyboardWillChangeFrame,
object: nil)
NotificationCenter.default.addObserver(self,
selector: #selector(TPKeyboardAvoiding_keyboardWillHide(_:)),
name: NSNotification.Name.UIKeyboardWillHide,
object: nil)
NotificationCenter.default.addObserver(self,
selector: #selector(scrollToActiveTextField),
name: NSNotification.Name.UITextViewTextDidBeginEditing,
object: nil)
NotificationCenter.default.addObserver(self,
selector: #selector(scrollToActiveTextField),
name: NSNotification.Name.UITextFieldTextDidBeginEditing,
object: nil)
}
}
// MARK: - ScrollView
class TPKeyboardAvoidingScrollView:UIScrollView,UITextFieldDelegate,UITextViewDelegate
{
override var contentSize:CGSize{
didSet{
self.TPKeyboardAvoiding_updateFromContentSizeChange()
}
}
override var frame:CGRect{
didSet{
self.TPKeyboardAvoiding_updateContentInset()
}
}
override init(frame: CGRect) {
super.init(frame: frame)
self.setup()
}
override func awakeFromNib() {
setup()
}
func contentSizeToFit()
{
self.contentSize = self.TPKeyboardAvoiding_calculatedContentSizeFromSubviewFrames()
}
func focusNextTextField() ->Bool
{
return self.TPKeyboardAvoiding_focusNextTextField()
}
@objc func scrollToActiveTextField()
{
return self.TPKeyboardAvoiding_scrollToActiveTextField()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
self.setup()
}
deinit{
NotificationCenter.default.removeObserver(self)
}
override func willMove(toSuperview newSuperview: UIView?) {
super.willMove(toSuperview: newSuperview)
if newSuperview != nil {
NSObject.cancelPreviousPerformRequests(withTarget: self, selector: #selector(TPKeyboardAvoiding_assignTextDelegateForViewsBeneathView(_:)), object: self)
}
}
override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
self.TPKeyboardAvoiding_findFirstResponderBeneathView(self)?.resignFirstResponder()
super.touchesEnded(touches, with: event)
}
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
if !self.focusNextTextField()
{
textField.resignFirstResponder()
}
return true
}
override func layoutSubviews() {
super.layoutSubviews()
NSObject.cancelPreviousPerformRequests(withTarget: self, selector: #selector(TPKeyboardAvoiding_assignTextDelegateForViewsBeneathView(_:)), object: self)
Timer.scheduledTimer(timeInterval: 0.1, target: self, selector: #selector(TPKeyboardAvoiding_assignTextDelegateForViewsBeneathView(_:)), userInfo: nil, repeats: false)
}
}
private extension TPKeyboardAvoidingScrollView
{
func setup()
{
NotificationCenter.default.addObserver(self,
selector: #selector(TPKeyboardAvoiding_keyboardWillShow(_:)),
name: NSNotification.Name.UIKeyboardWillChangeFrame,
object: nil)
NotificationCenter.default.addObserver(self,
selector: #selector(TPKeyboardAvoiding_keyboardWillHide(_:)),
name: NSNotification.Name.UIKeyboardWillHide,
object: nil)
NotificationCenter.default.addObserver(self,
selector: #selector(scrollToActiveTextField),
name: NSNotification.Name.UITextViewTextDidBeginEditing,
object: nil)
NotificationCenter.default.addObserver(self,
selector: #selector(scrollToActiveTextField),
name: NSNotification.Name.UITextFieldTextDidBeginEditing,
object: nil)
}
}
// MARK: - Process Event
let kCalculatedContentPadding:CGFloat = 10;
let kMinimumScrollOffsetPadding:CGFloat = 20;
extension UIScrollView
{
@objc func TPKeyboardAvoiding_keyboardWillShow(_ notification:Notification)
{
guard let userInfo = notification.userInfo else { return }
guard let rectNotification = notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue else
{
return
}
let keyboardRect = self.convert(rectNotification.cgRectValue , from: nil)
if keyboardRect.isEmpty
{
return
}
let state = self.keyboardAvoidingState()
guard let firstResponder = self.TPKeyboardAvoiding_findFirstResponderBeneathView(self) else { return}
state.keyboardRect = keyboardRect
if !state.keyboardVisible
{
state.priorInset = self.contentInset
state.priorScrollIndicatorInsets = self.scrollIndicatorInsets
state.priorPagingEnabled = self.isPagingEnabled
}
state.keyboardVisible = true
self.isPagingEnabled = false
if self is TPKeyboardAvoidingScrollView
{
state.priorContentSize = self.contentSize
if self.contentSize.equalTo(CGSize.zero)
{
self.contentSize = self.TPKeyboardAvoiding_calculatedContentSizeFromSubviewFrames()
}
}
let duration = userInfo[UIKeyboardAnimationDurationUserInfoKey] as? Float ?? 0.0
let curve = userInfo[UIKeyboardAnimationCurveUserInfoKey] as? Int ?? 0
let options = UIViewAnimationOptions(rawValue: UInt(curve))
UIView.animate(withDuration: TimeInterval(duration),
delay: 0,
options: options,
animations: { [weak self]() -> Void in
if let actualSelf = self
{
actualSelf.contentInset = actualSelf.TPKeyboardAvoiding_contentInsetForKeyboard()
let viewableHeight = actualSelf.bounds.size.height - actualSelf.contentInset.top - actualSelf.contentInset.bottom
let point = CGPoint(x: actualSelf.contentOffset.x, y: actualSelf.TPKeyboardAvoiding_idealOffsetForView(firstResponder, viewAreaHeight: viewableHeight))
actualSelf.setContentOffset(point, animated: false)
actualSelf.scrollIndicatorInsets = actualSelf.contentInset
actualSelf.layoutIfNeeded()
}
}) { (finished) -> Void in
}
}
@objc func TPKeyboardAvoiding_keyboardWillHide(_ notification:Notification)
{
guard let userInfo = notification.userInfo else { return }
guard let rectNotification = userInfo[UIKeyboardFrameEndUserInfoKey] as? NSValue else
{
return
}
let keyboardRect = self.convert(rectNotification.cgRectValue , from: nil)
if keyboardRect.isEmpty
{
return
}
let state = self.keyboardAvoidingState()
if !state.keyboardVisible
{
return
}
state.keyboardRect = CGRect.zero
state.keyboardVisible = false
let duration = userInfo[UIKeyboardAnimationDurationUserInfoKey] as? Float ?? 0.0
let curve = userInfo[UIKeyboardAnimationCurveUserInfoKey] as? Int ?? 0
let options = UIViewAnimationOptions(rawValue: UInt(curve))
UIView.animate(withDuration: TimeInterval(duration),
delay: 0,
options: options,
animations: { [weak self]() -> Void in
if let actualSelf = self
{
if actualSelf is TPKeyboardAvoidingScrollView {
actualSelf.contentSize = state.priorContentSize
actualSelf.contentInset = state.priorInset
actualSelf.scrollIndicatorInsets = state.priorScrollIndicatorInsets
actualSelf.isPagingEnabled = state.priorPagingEnabled
actualSelf.layoutIfNeeded()
}
}
}) { (finished) -> Void in
}
}
func TPKeyboardAvoiding_updateFromContentSizeChange()
{
let state = self.keyboardAvoidingState()
if state.keyboardVisible
{
state.priorContentSize = self.contentSize
}
}
func TPKeyboardAvoiding_focusNextTextField() ->Bool
{
guard let firstResponder = self.TPKeyboardAvoiding_findFirstResponderBeneathView(self) else { return false}
guard let view = self.TPKeyboardAvoiding_findNextInputViewAfterView(firstResponder, beneathView: self) else { return false}
Timer.scheduledTimer(timeInterval: 0.1, target: view, selector: #selector(becomeFirstResponder), userInfo: nil, repeats: false)
return true
}
func TPKeyboardAvoiding_scrollToActiveTextField()
{
let state = self.keyboardAvoidingState()
if !state.keyboardVisible { return }
let visibleSpace = self.bounds.size.height - self.contentInset.top - self.contentInset.bottom
let idealOffset = CGPoint(x: 0,
y: self.TPKeyboardAvoiding_idealOffsetForView(self.TPKeyboardAvoiding_findFirstResponderBeneathView(self),
viewAreaHeight: visibleSpace))
DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + Double((Int64)(0 * NSEC_PER_SEC)) / Double(NSEC_PER_SEC)) {[weak self] () -> Void in
self?.setContentOffset(idealOffset, animated: true)
}
}
//Helper
func TPKeyboardAvoiding_findFirstResponderBeneathView(_ view:UIView) -> UIView?
{
for childView in view.subviews
{
if childView.responds(to: #selector(getter: isFirstResponder)) && childView.isFirstResponder
{
return childView
}
let result = TPKeyboardAvoiding_findFirstResponderBeneathView(childView)
if result != nil
{
return result
}
}
return nil
}
func TPKeyboardAvoiding_updateContentInset()
{
let state = self.keyboardAvoidingState()
if state.keyboardVisible
{
self.contentInset = self.TPKeyboardAvoiding_contentInsetForKeyboard()
}
}
func TPKeyboardAvoiding_calculatedContentSizeFromSubviewFrames() ->CGSize
{
let wasShowingVerticalScrollIndicator = self.showsVerticalScrollIndicator
let wasShowingHorizontalScrollIndicator = self.showsHorizontalScrollIndicator
self.showsVerticalScrollIndicator = false
self.showsHorizontalScrollIndicator = false
var rect = CGRect.zero
for view in self.subviews
{
rect = rect.union(view.frame)
}
rect.size.height += kCalculatedContentPadding
self.showsVerticalScrollIndicator = wasShowingVerticalScrollIndicator
self.showsHorizontalScrollIndicator = wasShowingHorizontalScrollIndicator
return rect.size
}
func TPKeyboardAvoiding_idealOffsetForView(_ view:UIView?,viewAreaHeight:CGFloat) -> CGFloat
{
let contentSize = self.contentSize
var offset:CGFloat = 0.0
let subviewRect = view != nil ? view!.convert(view!.bounds, to: self) : CGRect.zero
var padding = (viewAreaHeight - subviewRect.height)/2
if padding < kMinimumScrollOffsetPadding
{
padding = kMinimumScrollOffsetPadding
}
offset = subviewRect.origin.y - padding - self.contentInset.top
if offset > (contentSize.height - viewAreaHeight)
{
offset = contentSize.height - viewAreaHeight
}
if offset < -self.contentInset.top
{
offset = -self.contentInset.top
}
return offset
}
func TPKeyboardAvoiding_contentInsetForKeyboard() -> UIEdgeInsets
{
let state = self.keyboardAvoidingState()
var newInset = self.contentInset;
let keyboardRect = state.keyboardRect
newInset.bottom = keyboardRect.size.height - max(keyboardRect.maxY - self.bounds.maxY, 0)
return newInset
}
func TPKeyboardAvoiding_viewIsValidKeyViewCandidate(_ view:UIView)->Bool
{
if view.isHidden || !view.isUserInteractionEnabled {return false}
if view is UITextField
{
if (view as! UITextField).isEnabled {return true}
}
if view is UITextView
{
if (view as! UITextView).isEditable {return true}
}
return false
}
func TPKeyboardAvoiding_findNextInputViewAfterView(_ priorView:UIView,beneathView view:UIView, candidateView bestCandidate: inout UIView?)
{
let priorFrame = self.convert(priorView.frame, to: priorView.superview)
let candidateFrame = bestCandidate == nil ? CGRect.zero : self.convert(bestCandidate!.frame, to: bestCandidate!.superview)
var bestCandidateHeuristic = -sqrt(candidateFrame.origin.x*candidateFrame.origin.x + candidateFrame.origin.y*candidateFrame.origin.y) + ( Float(fabs(candidateFrame.minY - priorFrame.minY))<Float.ulpOfOne ? 1e6 : 0)
for childView in view.subviews
{
if TPKeyboardAvoiding_viewIsValidKeyViewCandidate(childView)
{
let frame = self.convert(childView.frame, to: view)
let heuristic = -sqrt(frame.origin.x*frame.origin.x + frame.origin.y*frame.origin.y)
+ (Float(fabs(frame.minY - priorFrame.minY)) < Float.ulpOfOne ? 1e6 : 0)
if childView != priorView && (Float(fabs(frame.minY - priorFrame.minY)) < Float.ulpOfOne
&& frame.minX > priorFrame.minX
|| frame.minY > priorFrame.minY)
&& (bestCandidate == nil || heuristic > bestCandidateHeuristic)
{
bestCandidate = childView
bestCandidateHeuristic = heuristic
}
}else
{
self.TPKeyboardAvoiding_findNextInputViewAfterView(priorView, beneathView: view, candidateView: &bestCandidate)
}
}
}
func TPKeyboardAvoiding_findNextInputViewAfterView(_ priorView:UIView,beneathView view:UIView) ->UIView?
{
var candidate:UIView?
self.TPKeyboardAvoiding_findNextInputViewAfterView(priorView, beneathView: view, candidateView: &candidate)
return candidate
}
@objc func TPKeyboardAvoiding_assignTextDelegateForViewsBeneathView(_ obj: AnyObject)
{
func processWithView(_ view: UIView) {
for childView in view.subviews
{
if childView is UITextField || childView is UITextView
{
self.TPKeyboardAvoiding_initializeView(childView)
}else
{
self.TPKeyboardAvoiding_assignTextDelegateForViewsBeneathView(childView)
}
}
}
if let timer = obj as? Timer, let view = timer.userInfo as? UIView {
processWithView(view)
}
else if let view = obj as? UIView {
processWithView(view)
}
}
func TPKeyboardAvoiding_initializeView(_ view:UIView)
{
if let textField = view as? UITextField,
let delegate = self as? UITextFieldDelegate, textField.returnKeyType == UIReturnKeyType.default &&
textField.delegate !== delegate
{
textField.delegate = delegate
let otherView = self.TPKeyboardAvoiding_findNextInputViewAfterView(view, beneathView: self)
textField.returnKeyType = otherView != nil ? .next : .done
}
}
func keyboardAvoidingState()->TPKeyboardAvoidingState
{
var state = objc_getAssociatedObject(self, &AssociatedKeysKeyboard.DescriptiveName) as? TPKeyboardAvoidingState
if state == nil
{
state = TPKeyboardAvoidingState()
self.state = state
}
return self.state!
}
}
// MARK: - Internal object observer
internal class TPKeyboardAvoidingState:NSObject
{
var priorInset = UIEdgeInsets.zero
var priorScrollIndicatorInsets = UIEdgeInsets.zero
var keyboardVisible = false
var keyboardRect = CGRect.zero
var priorContentSize = CGSize.zero
var priorPagingEnabled = false
}
internal extension UIScrollView
{
fileprivate struct AssociatedKeysKeyboard {
static var DescriptiveName = "KeyBoard_DescriptiveName"
}
var state:TPKeyboardAvoidingState?{
get{
let optionalObject:AnyObject? = objc_getAssociatedObject(self, &AssociatedKeysKeyboard.DescriptiveName) as AnyObject?
if let object:AnyObject = optionalObject {
return object as? TPKeyboardAvoidingState
} else {
return nil
}
}
set{
objc_setAssociatedObject(self, &AssociatedKeysKeyboard.DescriptiveName, newValue, objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN_NONATOMIC)
}
}
}
Just enclose your textbox inside a view and then override inputAccessoryView returning the view. 只需将文本框包含在视图中,然后重写inputAccessoryView即可返回视图。 Important: Your view should be created programmatically.
重要:您的视图应以编程方式创建。 Do not use @IBOutlets.
不要使用@IBOutlets。
override var inputAccessoryView: UIView? {
get {
return newlyProgramaticallyCreatedView
}}
If you're like me, using Autolayout and not getting the keyboard when running the App on a simulator. 如果您像我一样,请在模拟器上运行该应用程序时使用自动版式设置并且不弄键盘。 This might be because Apple make you use the keyboard of you're computer as first Keyboard.
这可能是因为Apple让您使用计算机的键盘作为第一个键盘。
To make the keyboard from the device appear : 要使设备上的键盘出现:
shift + cmd + K 移位 + cmd + K
Sounds stupid but I would have loved to find this answer 3 hours ago :) 听起来很愚蠢,但我很想在3小时前找到这个答案:)
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.