KeyboardWillShow only moves container UIView for certain UITextFields

问题

I have a container UIView that contains a UICollectionView and a UIView, both of which have UITextFields in them. I used NSNotificationCenter to move the container view when the keyboard pops up.

However, it only seems to work for the UICollectionView but not the sub UIView, as shown in the screenshots:

works fine for the text fields in UICollectionView:

but doesn't work for the text field in the UIView:

EDIT: related code:

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)

}



override func viewWillDisappear(animated: Bool) {
    super.viewWillDisappear(animated)

    NSNotificationCenter.defaultCenter().removeObserver(self)
}

func keyboardWillShow(notification: NSNotification) {
    if let userInfo = notification.userInfo {
        if let keyboardSize =  (userInfo[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue() {
            kbHeight = keyboardSize.height
            self.animateDurationView(true)
        }
    }
}

func keyboardWillHide(notification: NSNotification) {
    self.animateDurationView(false)
}

func animateDurationView(up: Bool) {
    var movement = (up ? -kbHeight : kbHeight)

    UIView.animateWithDuration(0.3, animations: {
        self.durationView.frame = CGRectOffset(self.durationView.frame, 0, movement)
    })
}

来源：https://stackoverflow.com/questions/31504240/keyboardwillshow-only-moves-container-uiview-for-certain-uitextfields

标签

ios

swift

nsnotificationcenter

uikeyboard