Ios Swift:当为键盘升高视图时,视图会反弹
当一个小键盘出现时,我试图提升视图,但它只是反弹回来。如果我给Y一个正值(向下移动视图),那么它将保持不变Ios Swift:当为键盘升高视图时,视图会反弹,ios,swift,cgrect,keypad,Ios,Swift,Cgrect,Keypad,当一个小键盘出现时,我试图提升视图,但它只是反弹回来。如果我给Y一个正值(向下移动视图),那么它将保持不变 @IBOutlet weak var PPI: MainTextFields! var KbHeight: CGFloat! //---------------------------------------------- func animateTextField(up: Bool) { let TFMovement = (up
@IBOutlet weak var PPI: MainTextFields!
var KbHeight: CGFloat!
//----------------------------------------------
func animateTextField(up: Bool) {
let TFMovement = (up ? -KbHeight : KbHeight)
UIView.animateWithDuration(0.7, animations: {
self.view.frame = CGRectOffset(self.view.frame, 0, TFMovement)
})
}
func keyboardWillShow(notification: NSNotification) {
if let userInfo = notification.userInfo {
if let keyboardSize = (userInfo[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue() {
KbHeight = keyboardSize.height
self.animateTextField(true)
}
}
}
func keyboardWillHide(notification: NSNotification) {
self.animateTextField(false)
}
//----------------------------------------------
// Touch Outside Keypad to leave it
override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
self.view.endEditing(true)
}
override func viewWillAppear(animated:Bool) {
super.viewWillAppear(animated)
// For TextField Movement
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillShow:"), name: UIKeyboardWillShowNotification, object: nil)
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillHide:"), name: UIKeyboardWillHideNotification, object: nil)
}
override func viewWillDisappear(animated: Bool) {
super.viewWillDisappear(animated)
// For TextField Movement
NSNotificationCenter.defaultCenter().removeObserver(self)
}
override func viewDidLoad() {
super.viewDidLoad()
PPI.delegate = self
}
@IBOutlet弱变量PPI:MainTextFields!
高度:CGFloat!
//----------------------------------------------
func animateTextField(向上:Bool){
让TFMovement=(向上?-KbHeight:KbHeight)
UIView.animateWithDuration(0.7,动画:{
self.view.frame=CGRectOffset(self.view.frame,0,TFMovement)
})
}
func键盘将显示(通知:NSNotification){
如果让userInfo=notification.userInfo{
如果让keyboardSize=(userInfo[UIKeyboardFrameBeginUserInfo]作为?NSValue)?.CGRectValue(){
KbHeight=键盘尺寸.height
self.animateTextField(true)
}
}
}
func键盘将隐藏(通知:NSNotification){
self.animateTextField(false)
}
//----------------------------------------------
//触按外部键盘可将其保留
覆盖功能触摸开始(触摸:设置,withEvent事件:UIEvent?){
self.view.endEditing(true)
}
覆盖功能视图将出现(动画:Bool){
超级。视图将显示(动画)
//用于文本字段移动
NSNotificationCenter.defaultCenter().addObserver(self,选择器:选择器(“keyboardWillShow:”),名称:UIKeyboardWillShowNotification,对象:nil)
NSNotificationCenter.defaultCenter().addObserver(self,选择器:选择器(“keyboardWillHide:”),名称:UIKeyboardWillHideNotification,对象:nil)
}
覆盖功能视图将消失(动画:Bool){
超级。视图将消失(动画)
//用于文本字段移动
NSNotificationCenter.defaultCenter().removeObserver(自)
}
重写func viewDidLoad(){
super.viewDidLoad()
PPI.delegate=self
}
键盘willshow
功能中的CGRectOffset
是否有问题?我对Swift比较陌生,这是从一个教程中获得的,但似乎无法正常工作。我想在加载viewController时制作从左到右的背景移动动画。以下是我在应用程序中制作的内容:
var backgroundImageView: UIImageView = UIImageView(image:
UIImage(named: "background.png")!)
self.view.addSubview(backgroundImageView)
self.view.sendSubviewToBack(backgroundImageView)
UIView.animateWithDuration(20.0, animations: {
backgroundImageView.frame = CGRect(x: -700, y: 0, width: backgroundImageView.image!.size.width, height:backgroundImageView.image!.size.height)
})
希望这个例子能有所帮助:)
尝试使用CGRect,并给它正的y值。这样,您将在动画结束时获得此矩形位置。当键盘关闭时,将其向后移动,y值为0。这是因为我对上边距的自动布局约束,因此需要更改该约束的常数,并且线条:
self.view.frame = CGRectOffset(self.view.frame, 0, TFMovement)
根本不需要。您的视图有约束吗?如果是这样的话,那么更改帧将永远不会有帮助。您应该根据您希望视图成为什么样的视图来更改视图约束,而不是更改框架,该框架立即被该视图上定义的约束更改回。