[英]Move the screen up when keyboard appears depending of the textView. Swift
当键盘出现时,我试图将屏幕向上移动。 我成功完成了它但我需要知道如何仅在单击底部UITextView
时滚动视图,而不是使用顶部TextView
因为键盘只是触及下面的TextView
。
应用是这样的:
class viewControllerCuatro: UIViewController, UITextViewDelegate {
@IBOutlet weak var textViewInteriorUno: UITextView!
@IBOutlet weak var textViewInteriorDos: UITextView!
override func viewDidLoad() {
self.navigationItem.backBarButtonItem = UIBarButtonItem(title: "Atrás", style: UIBarButtonItemStyle.Plain, target: nil, action: nil)
**NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillShow:"), name:UIKeyboardWillShowNotification, object: self.view.window)
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillHide:"), name:UIKeyboardWillHideNotification, object: self.view.window)**
}
**func keyboardWillShow(sender: NSNotification) {**
// 1
let userInfo: [NSObject : AnyObject] = sender.userInfo!
// 2
let keyboardSize: CGSize = userInfo[UIKeyboardFrameBeginUserInfoKey]!.CGRectValue.size
let offset: CGSize = userInfo[UIKeyboardFrameEndUserInfoKey]!.CGRectValue.size
// 3
if keyboardSize.height == offset.height {
UIView.animateWithDuration(0.1, animations: { () -> Void in
self.view.frame.origin.y -= keyboardSize.height
})
} else {
UIView.animateWithDuration(0.1, animations: { () -> Void in
self.view.frame.origin.y += keyboardSize.height - offset.height
})
}
}
**func keyboardWillHide(sender: NSNotification)** {
let userInfo: [NSObject : AnyObject] = sender.userInfo!
let keyboardSize: CGSize = userInfo[UIKeyboardFrameBeginUserInfoKey]!.CGRectValue.size
self.view.frame.origin.y += keyboardSize.height
}
**override func viewWillDisappear(animated: Bool)** {
NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillShowNotification, object: self.view.window)
NSNotificationCenter.defaultCenter().removeObserver(self, name: UIKeyboardWillHideNotification, object: self.view.window)
}
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
if textViewInteriorUno.text == "" || textViewInteriorUno.text.isEmpty == true || textViewInteriorDos.text == "" || textViewInteriorDos.text.isEmpty == true {
textViewInteriorUno.resignFirstResponder()
textViewInteriorDos.resignFirstResponder()
}
else{
self.textViewInteriorUno.resignFirstResponder()
self.textViewInteriorDos.resignFirstResponder()
}
}
func textView(textView: UITextView, shouldChangeTextInRange range: NSRange, replacementText text: String) -> Bool{
var shouldReplace = true // For most cases, return true, only modify if we have a special case
// If the textView is 'textViewInteriorUno'
if textView.isEqual(textViewInteriorUno) {
let newLength = textViewInteriorUno.text.utf16.count + text.utf16.count - range.length
shouldReplace = newLength <= 12 // will be true if the length is <= 12
}
else if textView.isEqual(textViewInteriorDos) {
let newLength = textViewInteriorDos.text.utf16.count + text.utf16.count - range.length
shouldReplace = newLength < 13 // Will be true if the length > 6
}
return shouldReplace
}
IQKeyboardManager对我来说是个天赐之物!
第1步:
您所要做的就是从https://github.com/hackiftekhar/IQKeyboardManager下载该项目,并将IQKeyboardManagerSwift目录从演示项目移动到您的项目中。
移动后,确保IQKeyboardManagerSwift目录是项目中的正确位置。
第2步:
然后在AppDelegate.swift中,只需在应用程序函数中启用IQKeyboardManager。
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool
{
// This is the only line of code you need to manually add
// in order for IQKeybaordManager to work. Thats it.
IQKeyboardManager.sharedManager().enable = true
return true
}
}
而已! 现在,您的键盘将向上滑动并相应地移动视图。 对这个框架的创建者的道具,使我们的生活更容易。
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