键盘出现在Swift中时UITextField向上移动 [英] UITextField move up when keyboard appears in Swift

问题描述

当键盘出现时，我使用此代码将视图向上移动，在我的登录页面中，此代码非常有用，但在注册页面中，它却无效.

I use this code for move the view up when keyboard appears, in my login page this code worked great, but in the signup page it did not work.

func textFieldDidBeginEditing(textField: UITextField) {
    animateViewMoving(true, moveValue: 100)
}
func textFieldDidEndEditing(textField: UITextField) {
    animateViewMoving(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()
}

我还有另一个在键盘上返回键的功能，它也可以在登录页面上使用，但不能在注册页面上使用.两页之间的所有内容都相同.

I have another function to return key on the keyboard, it also worked on the login page but not on the signup page. All things are same between the two pages.

  func textFieldShouldReturn(textField: UITextField) -> Bool {

    textField.resignFirstResponder()
    return true
}

推荐答案

您是否已在ViewController类中分配了UITextField的委托? 如果未将其设置为self.

have you assigned your delegate of UITextField in your ViewController class? if not set it to self.

self.youttextfield.delegate = self

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