ios - 如果用户双击文本字段，键盘会变黑

Question

我有一个注册页面，其中有 3 个文本字段。触摸文本字段时， View 会向上滑动，以便在显示键盘时可以看到这些字段。但是，如果用户快速点击文本框两次，而不是点击一次，键盘会变黑， View 定位会无可挽回地困惑。这是问题的照片，代码在下面，提前致谢 ] 1

    override func viewDidLoad() {
        super.viewDidLoad()

        emailTextField.delegate = self
        passwordTextField.delegate = self
        verifyPasswordTextField.delegate = self

        emailTextField.autocorrectionType = UITextAutocorrectionType.No

        NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillShow:"), name: UIKeyboardWillShowNotification, object: nil)
        NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("keyboardWillHide:"), name: UIKeyboardWillHideNotification, object: nil)
    }


// method to move the view up when keyboard appears
func keyboardWillShow(notification: NSNotification) {

       if viewIsLifted == false {

       if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue() {

                            // hide the logo and name when view slides up
                            UIView.animateWithDuration(0.2, delay: 0.0, options: UIViewAnimationOptions.CurveEaseInOut, animations: { () -> Void in

                               self.likemojiIcon.alpha = 0
                               self.likemojiLabel.alpha = 0

                               }, completion: nil)

                            self.view.frame.origin.y -= keyboardSize.height
                            viewIsLifted = true
                         }
                      }
                   }


                   // method to slide view back down when keyboard is resigned
                   func keyboardWillHide(notification: NSNotification) {

                      if viewIsLifted == true {

                         if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.CGRectValue() {

                            // make logo and name reappear on slide back down
                            UIView.animateWithDuration(0.2, delay: 0.0, options: UIViewAnimationOptions.CurveEaseInOut, animations: { () -> Void in

                               self.likemojiIcon.alpha = 1
                               self.likemojiLabel.alpha = 1

                               }, completion: nil)

                            self.view.frame.origin.y += keyboardSize.height
                            viewIsLifted = false
                         }
                      }
                   }

Answer 1

当您收到键盘将出现的通知时关闭用户交互(beginIgnoringInteractionEvents)，然后重新打开(endIgnoringInteractionEvents)当您收到键盘确实出现的通知时。