Question

我有一个包含4个文本字段和一个按钮的视图..这个视图不是主视图..问题是键盘覆盖了文本字段和按钮！

我尝试了这段代码，但它不起作用：

   // Move the text field in a pretty animation!
func moveTextField(_ textField: UITextField, moveDistance: Int, up: Bool) {
    let moveDuration = 0.3
    let movement: CGFloat = CGFloat(up ? moveDistance : -moveDistance)
    if textField.tag>=2{
        UIView.beginAnimations("animateTextField", context: nil)
        UIView.setAnimationBeginsFromCurrentState(true)
        UIView.setAnimationDuration(moveDuration)
        self.view.frame = self.view.frame.offsetBy(dx: 0, dy: movement)
        UIView.commitAnimations()}
}

我已经为它们设置了从0到4的标签号......

我在viewDidLoad中设置了委托：

    fname.delegate=self
    email.delegate=self
    mobile1.delegate=self
    mobile2.delegate=self

但这不起作用仍然键盘将覆盖文本字段和按钮！为什么？以及如何解决它？

更新：

我想我发现了问题......我试过这个：

  NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillChange(notification:)), name: NSNotification.Name.UIKeyboardDidShow, object: nil)
    NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillChange(notification:)), name: NSNotification.Name.UIKeyboardDidHide, object: nil)
    NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillChange(notification:)), name: NSNotification.Name.UIKeyboardDidChangeFrame, object: nil)
}
deinit {
    NotificationCenter.default.removeObserver(self, name: NSNotification.Name.UIKeyboardDidShow, object: nil)
    NotificationCenter.default.removeObserver(self, name: NSNotification.Name.UIKeyboardDidHide, object: nil)
    NotificationCenter.default.removeObserver(self, name: NSNotification.Name.UIKeyboardDidChangeFrame, object: nil)
}

@objc func keyboardWillChange(notification: Notification){

    guard let keyboardRect = (notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue else{
        return
    }
    if activeTF.tag >= 2 {
    if notification.name == Notification.Name.UIKeyboardDidShow || notification.name == Notification.Name.UIKeyboardDidChangeFrame {

        view.frame.origin.y = -keyboardRect.height
   }else{
        view.frame.origin.y = 0
    }
}
}

with：

func textFieldShouldReturn(_ textField: UITextField) -> Bool
{
    textField.resignFirstResponder()
    return true

}

这两个功能完美无缺......但是当我将其更改为：

  func textFieldShouldReturn(_ textField: UITextField) -> Bool
{

    // Try to find next responder
    if let nextField = textField.superview?.viewWithTag(textField.tag + 1) as? UITextField {
        nextField.becomeFirstResponder()
    } else {
        // Not found, so remove keyboard.
        textField.resignFirstResponder()
    }
    //do not add a line break
    return false
}

只有maketextfieldreturn可以工作，而且keyboardwillchange不起作用！为什么呢？

键盘覆盖子视图中的文本字段

0 个答案: