當鍵盤出現快速時移動文本字段
[英]Move textfield when keyboard appears swift
問題描述
我正在使用 Swift 進行 iOS 編程，並且我正在使用此代碼移動UITextField ，但它不起作用。 我正確調用了函數keyboardWillShow ，但文本字段不會移動。 我正在使用自動布局。
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")
}
}
37 個解決方案
解決方案1
330 已采納 2014-11-25 20:23:17
對現有答案有一些改進。
首先， UIKeyboardWillChangeFrameNotification可能是最好的通知，因為它處理的更改不僅是顯示/隱藏，而且是由於鍵盤更改（語言、使用第 3 方鍵盤等）和旋轉而引起的更改（但請注意下面的注釋表明鍵盤將隱藏應該也可以處理以支持硬件鍵盤連接）。
其次，可以從通知中提取動畫參數，以確保動畫正確組合在一起。
可能有一些選項可以更清理此代碼，特別是如果您對強制展開字典代碼感到滿意。
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)
}
}
解決方案2
131 2014-09-05 20:45:13
如果您使用自動布局，我假設您已將底部空間設置為 Superview約束。 如果是這種情況，您只需更新約束的值。 這是你如何通過一點動畫來做到這一點。
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
})
}
添加硬編碼 20 只是為了將鍵盤上方的文本字段彈出一點。 否則鍵盤的上邊距和文本字段的下邊距會相互影響。
當鍵盤關閉時，將約束的值重置為其原始值。
解決方案3
121 2015-01-27 07:50:05
一個簡單的解決方案是在鍵盤高度不變的情況下向上移動視圖。
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
}
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);
解決方案4
47 2015-01-09 07:18:08
為了在編輯文本字段時移動您的視圖試試這個，我已經應用了這個，
選項 1：- ** **使用 NotificationCenter在 Swift 5.0 和 iPhone X、XR、XS 和 XS Max Move 中更新
在
func viewWillAppear(_ animated: Bool)注冊此通知在
func viewWillDisappear(_ animated: Bool)取消注冊此通知
注意：- 如果您不注銷，它會從子類調用，並且會導致崩潰或其他原因。
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)
}
}
選項 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()
}
當鍵盤出現在 Swift 中時，我從這個源UITextField move up得到了這個答案
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()
}
解決方案5
21 2014-12-10 18:32:48
我喜歡干凈的 Swift 代碼。 所以這是我能想出的最緊湊的代碼，可以用鍵盤向上/向下移動文本視圖。 它目前正在 iOS8/9 Swift 2 生產應用程序中工作。
更新（2016 年 3 月）：我只是盡可能地收緊了我以前的代碼。 此外，這里有很多流行的答案，它們對鍵盤高度和動畫參數進行了硬編碼。 沒有必要，更不用說這些答案中的數字並不總是與我在 6s+ iOS9 上看到的實際值一致（鍵盤高度為 226，持續時間為 0.25，動畫曲線為 7）。 無論如何，直接從系統中獲取這些值幾乎不需要額外的代碼。 見下文。
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
)
}
注意：此代碼涵蓋了大多數注釋/一般情況。 但是，可能需要更多代碼來處理不同的方向和/或自定義鍵盤這里有一篇關於使用 iOS 鍵盤的深入文章。 如果您需要處理每種情況，這可能會有所幫助。
解決方案6
15 2015-03-28 08:11:45
編輯：我推薦一個更簡單、更清潔的解決方案。 只需將底部間距約束的類更改為KeyboardLayoutConstraint 。 它會自動擴展到鍵盤高度。
這是@JosephLord 答案的改進版本。
在 iOS 8.3 iPad 模擬器上測試，Portrait。 Xcode6.3 beta4，我發現他的答案在鍵盤隱藏時不起作用，因為UIKeyboardFrameEndUserInfoKey是"NSRect: {{0, 1024}, {768, 264}}"; . 高度永遠不是0 。
這可以追溯到使用傳統的UIKeyboardWillShowNotification和UIKeyboardWillHideNotification來更好地判斷鍵盤何時隱藏而不是依賴於結束幀的高度。 UIKeyboardWillShowNotification也會在鍵盤框架更改時發送，因此它應該涵蓋所有用例。
// 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)
}
}
解決方案7
10 2018-03-30 12:01:30
我正在使用swift 4 ，我在沒有使用任何額外底部約束的情況下解決了這個問題，看起來我的代碼在這里。它真的適用於我的案例
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）刪除通知觀察者，如
deinit { NotificationCenter.default.removeObserver(self) }
3）添加鍵盤顯示/隱藏方法，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) 添加 textfeild 委托並添加 touchesBegan 方法 .usefull 用於在屏幕上的 textfeild 之外觸摸時隱藏鍵盤
override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
view.endEditing(true)
}
解決方案8
9 2015-12-16 06:17:41
你可以使用這個庫，在 appDidFinishedLaunching 中只需一行代碼，你就完成了..
func application(application: UIApplication,didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
IQKeyboardManager.sharedManager().enable = true
return true
}
IQKeyboardManager - 每當鍵盤出現時調整視圖鏈接 - https://github.com/hackiftekhar/IQKeyboardManager
解決方案9
8 2015-04-07 09:37:55
這是@JosephLord 和@Hlung 答案的改進版本。 無論您是否有標簽欄，它都可以應用。 並且可以完美還原鍵盤移動到原始位置的視圖。
// 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)
}
}
解決方案10
8 2017-04-22 11:20:19
我創建了一個 Swift 3 協議來處理鍵盤的出現/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)
}
}
然后，要在 UIViewController 中實現它，請執行以下操作：
讓 viewController 遵守這個協議：
class FormMailVC: UIViewControlle, KeyboardHandler {開始觀察 viewWillAppear 中的鍵盤變化：
// MARK: - View controller life cycle override func viewWillAppear(_ animated: Bool) { super.viewWillAppear(animated) startObservingKeyboardChanges() }停止觀察 viewWillDisappear 中的鍵盤變化：
override func viewWillDisappear(_ animated: Bool) { super.viewWillDisappear(animated) stopObservingKeyboardChanges() }從情節提要中為底部約束創建一個 IBOutlet：
// NSLayoutConstraints @IBOutlet weak var bottomConstraint: NSLayoutConstraint!（我建議將所有 UI 嵌入到“contentView”中，並將此 contentView 的底部約束鏈接到底部布局指南）
將頂部約束的約束優先級更改為 250（低）
這是為了讓整個內容視圖在鍵盤出現時向上滑動。 優先級必須低於子視圖中的任何其他約束優先級，包括內容擁抱優先級/內容抗壓縮優先級。
- 確保您的 Autolayout 有足夠的約束來確定 contentView 應該如何向上滑動。
您可能必須為此添加“大於等於”約束：
給你！
解決方案11
6 2016-02-17 21:30:54
不需要任何代碼的最簡單方法：
- 如果您尚未使用 Spring 動畫框架，請下載KeyboardLayoutConstraint.swift並將文件添加（拖放）到您的項目中。
- 在您的故事板中，為對象/視圖/文本字段創建一個底部約束，選擇該約束（雙擊它）並在 Identity Inspector 中，將其類從 NSLayoutConstraint 更改為 KeyboardLayoutConstraint。
- 完畢！
該對象將與鍵盤同步自動向上移動。
解決方案12
6 2016-04-23 08:58:37
可以使用這樣簡單的UIViewController擴展
//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)
}
}
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()
})
}
斯威夫特 4 解決方案
//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)
}
}
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")
}
})
}
}
解決方案13
4 2015-02-12 09:59:42
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()
}
最后因為我們使用的是委托方法
func textFieldShouldReturn(textField: UITextField) -> Bool {
textField.resignFirstResponder()
return true
}
從使用objective-c重構http://www.cocoawithlove.com/2008/10/sliding-uitextfields-around-to-avoid.html
解決方案14
4 2015-05-24 14:06:25
另一種不依賴於自動布局、約束或任何出口的解決方案。 您需要的是滾動視圖中的字段。
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
})
}
}
解決方案15
4 2016-04-12 13:33:51
這是我的 Swift 2.2 解決方案版本：
首先注冊鍵盤顯示/隱藏通知
NSNotificationCenter.defaultCenter().addObserver(self,
selector: #selector(MessageThreadVC.keyboardWillShow(_:)),
name: UIKeyboardWillShowNotification,
object: nil)
NSNotificationCenter.defaultCenter().addObserver(self,
selector: #selector(MessageThreadVC.keyboardWillHide(_:)),
name: UIKeyboardWillHideNotification,
object: nil)
然后在對應於這些通知的方法中向上或向下移動主視圖
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
}
訣竅在於“keyboardWillShow”部分，每次展開或折疊“QuickType Suggestion Bar”時都會調用該部分。 然后我們總是設置主視圖的 y 坐標，它等於鍵盤總高度的負值（有或沒有“QuickType bar”部分）。
最后不要忘記移除觀察者
deinit {
NSNotificationCenter.defaultCenter().removeObserver(self)
}
解決方案16
4 2020-09-27 22:10:53
frédéric-adda 的Swift 5解決方案：
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)
}
}
在任何UIViewController ：
- 符合
KeyboardHandler協議
extension AnyViewController: KeyboardHandler {}
- 為屏幕上的最后一個底部元素添加底部約束。
@IBOutlet var bottomConstraint: NSLayoutConstraint!
- 添加觀察者訂閱/取消訂閱：
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
startObservingKeyboardChanges()
}
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
stopObservingKeyboardChanges()
}
享受！
解決方案17
3 2015-03-23 11:03:44
以下是一個簡單的解決方案，其中文本字段具有將其綁定到底部布局指南的約束。 它只是將鍵盤高度添加到約束的常量中。
// 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
}
}
解決方案18
3 2015-04-15 21:16:52
好吧，我想我可能為時已晚，但我找到了 Saqib 答案的另一個簡單版本。 我正在使用帶有約束的自動布局。 我在另一個帶有用戶名和密碼字段的主視圖中有一個小視圖。 我沒有更改視圖的 y 坐標，而是將原始約束值保存在變量中，並將約束的常量更改為某個值，然后在鍵盤關閉后再次將約束設置為原始值。 這樣就避免了 Saqib 的答案所存在的問題（視圖不斷向上移動，不會停止）。 下面是我的代碼...
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
}
解決方案19
3 2018-12-11 09:47:18
Swift 4.x 答案，合並了@Joseph Lord 和@Isuru 的答案。 bottomConstraint表示您有興趣移動的視圖的底部約束。
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)
}
}
解決方案20
3 2019-09-30 16:45:18
非常簡單，無需編寫更多代碼。 只需在您的 podfile 中添加pod 'IQKeyboardManagerSwift' ，並在您的AppDelegate頁面中添加下面的代碼。
import IQKeyboardManagerSwift
並在方法didFinishLaunchingWithOptions()類型
IQKeyboardManager.shared.enable = true
這就對了。 查看此視頻鏈接以更好地了解https://youtu.be/eOM94K1ZWN8希望這對您有所幫助。
解決方案21
3 2020-03-12 07:23:45
用於管理鍵盤的完整代碼。
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
}
}
解決方案22
2 2015-12-15 13:13:15
我通過以下方式完成了：
這在文本字段超級視圖是視圖時很有用
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
}
} }
解決方案23
2 2016-08-16 13:02:57
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
}
解決方案24
2 2021-01-13 09:05:58
對於不使用故事板來設置布局約束的任何人。 這是一種使其在 Swift 5 上運行的純編程方式：
- 在您的 viewController 中定義一個空約束。 在這種情況下，我正在構建一個聊天應用程序，它在屏幕的最底部有一個包含文本視圖的 UIView。
var discussionsMessageBoxBottomAnchor: NSLayoutConstraint = NSLayoutConstraint()
- 在 viewDidLoad 中為最底部的視圖添加約束。 在這種情況下
discussionsMessageBox。 此外，添加鍵盤事件的偵聽器。
為了正確初始化約束，您需要先添加子視圖，然后定義約束。
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 ])
- 定義
deinit。
deinit {
NotificationCenter.default.removeObserver(self)
}
- 接下來添加@JosephLord 定義的代碼，並進行一項修正以修復偏移數學。
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)
}
}
解決方案25
1 2015-07-08 11:56:19
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
解決方案26
1 2017-06-08 11:28:21
如果您像我一樣嘗試了上述所有解決方案，但仍然沒有解決您的問題，那么我為您提供了一個很好的解決方案，效果非常好。 首先，我想澄清一些關於上述一些解決方案的事情。
- 在我的情況下，IQkeyboardmanager 僅在元素上沒有應用自動布局時才工作，如果應用了它，那么 IQkeyboard manager 將不會像我們想象的那樣工作。
- 與self.view 的向上移動相同。
- 我寫了一個客觀的 c 標頭，當用戶點擊它時，它可以快速支持向上推 UITextfield，解決鍵盤覆蓋 UITextfield 的問題： https : //github.com/coolvasanth/smart_keyboard 。
- 在 iOS 應用程序開發中具有中級或更高級別的人可以輕松理解存儲庫並實施它。 祝一切順利
解決方案27
1 2019-08-07 10:17:33
這是所有 TextField 步驟的通用解決方案 -
1）創建一個通用的ViewController，由其他ViewControllers擴展
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) 創建 UIViewController 的擴展和當前活動的 TextField
//get active text field
擴展 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
}
}
解決方案28
1 2021-04-16 18:34:33
非常容易安裝 Swift 或 Objective-C。
適用於 Swift 4 和 5 以及其他更新版本
這是它的工作原理：
IQKeyboardManager (Swift)：- IQKeyboardManagerSwift 可通過 Cocoapods 獲得，只需將以下行添加到您的 Podfile 中即可安裝它：
pod 'IQKeyboardManagerSwift'
在 AppDelegate.swift 中，只需導入 IQKeyboardManagerSwift 框架並啟用 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
}
}
解決方案29
0 2016-04-13 09:05:02
我稍微修改了@Simpa 解決方案.........
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
})
}
}
解決方案30
0 2016-08-11 19:08:37
它們都不起作用，當鍵盤出現時，我最終使用內容插入來向上移動我的視圖。
注意：我使用的是 UITableView
引用的解決方案@ keyboard-content-offset完全用目標 C 編寫，下面的解決方案是干凈的 Swift。
添加通知觀察者@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);
要獲取鍵盤大小，我們首先從通知對象中獲取 userInfo 字典，該字典存儲我們的接收器可能使用的任何其他對象。
從該字典中，我們可以通過使用鍵 UIKeyboardFrameBeginUserInfoKey 獲得描述鍵盤框架的 CGRect 對象。
為表格視圖@keyboardWillBeShown 方法應用內容插入，
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;
}
}
恢復視圖@keyboardWillBeHidden 方法
func keyboardWillBeHidden(sender: NSNotification)
{
// Moving back the table view back to the default position
yourTableView.contentInset = UIEdgeInsetsZero;
yourTableView.scrollIndicatorInsets = UIEdgeInsetsZero;
}
如果您還想考慮設備方向，請使用條件語句根據您的需要定制代碼。
// Portrait
UIEdgeInsetsMake(0.0, 0.0, (keyboardSize.height), 0.0);
// Landscape
UIEdgeInsetsMake(0.0, 0.0, (keyboardSize.width), 0.0);
解決方案31
0 2017-03-10 10:09:20
我正在使用Swift進行iOS編程，並且正在使用此代碼移動UITextField ，但是它不起作用。 我正確地調用了功能keyboardWillShow ，但是文本字段沒有移動。 我正在使用自動版式。
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")
}
}
解決方案32
0 2018-03-15 05:58:58
我使用的Swift 4解決方案采用鍵盤尺寸。 用您關心的任何視圖替換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)
}
解決方案33
0 2018-04-06 08:34:58
最好的方法是使用NotificationCenter捕獲鍵盤操作。 您可以按照此簡短文章中的步驟進行操作https://medium.com/@demirciy/keyboard-handling-deb1a96a8207
解決方案34
0 2018-06-21 05:54:01
Swift 4.1，
使用TPKeyBoardAvoiding類可實現此目的。 與UIScrollView ， UICollectionView ， UITableView一起使用時效果很好。
只需將此類分配給情節提要中的滾動視圖，集合視圖或表視圖，或以編程方式創建其對象。 當鍵盤出現和消失時， TPKeyboardAvoiding滾動視圖中的所有文本字段或文本視圖都會自動調整。
這是TPKeyboardAvoiding的鏈接
TPKeyboardAvoid用於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)
}
}
}
解決方案35
0 2019-04-25 23:06:39
只需將文本框包含在視圖中，然后重寫inputAccessoryView即可返回視圖。 重要：您的視圖應以編程方式創建。 不要使用@IBOutlets。
override var inputAccessoryView: UIView? {
get {
return newlyProgramaticallyCreatedView
}}
解決方案36
0 2019-05-08 15:49:38
如果您像我一樣，請在模擬器上運行該應用程序時使用自動版式設置並且不弄鍵盤。 這可能是因為Apple讓您使用計算機的鍵盤作為第一個鍵盤。
要使設備上的鍵盤出現：
移位 + cmd + K
聽起來很愚蠢，但我很想在3小時前找到這個答案:)
出現鍵盤時移動文本框覆蓋了（Swift）中的頂部文本框
[英]Moving textfield when keyboard appears is covering up top textfields in (Swift)
鍵盤出現時向上移動屏幕，具體取決於textView。 迅速
[英]Move the screen up when keyboard appears depending of the textView. Swift
出現鍵盤時移動視圖，並將其顯示在scrollView中。 迅捷3
[英]Move View when keyboard appears and present it in a scrollView. Swift 3
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