Question

我的ViewController上有两个UItextField。第一个位于ViewController的上半部分，但第二个位于底部。

我设法让键盘在返回时隐藏，但是当我点击第二个（下方）UItextField时，键盘出现并覆盖它。这意味着不再可能看到您正在键入的内容。

如何在单击第二个UItextField时向上移动ViewController，以便用户可以看到他们正在键入的内容，然后在用户按下返回时将ViewController向下移动？

Answer 1

使用 scrollView 并在键盘显示时滚动文本框

Answer 2

在您的 Hole View（ViewController 视图）中添加 scrollView 然后添加隐藏和显示键盘的通知

当键盘将通过减去键盘隐藏显示更改 scrollView 内容插入时：scrollView.ContentInsets.height - keyboard.height:

   func registerForKeyboardNotifications() {
    
    //Adding notifies on keyboard appearing
    NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow(notification:)), name: UIWindow.keyboardWillShowNotification, object: nil)
    
    NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide(notification:)), name: UIWindow.keyboardWillHideNotification, object: nil)
}

@objc
func keyboardWillShow(notification: NSNotification) {
    
    guard let keyboareRect =  notification.userInfo?[UIWindow.keyboardFrameBeginUserInfoKey] as? CGRect else { return }
    let keyboardSize = keyboareRect.size
    
    let insets = UIEdgeInsets(top: 0, left: 0, bottom: keyboardSize.height, right: 0)
    scrollView.contentInset = insets
    scrollView.scrollIndicatorInsets = insets
    
    var aRect = self.view.frame
    aRect.size.height -= keyboardSize.height
    
    guard let activeTextField = self.activeTextField else { return }
    
    if !aRect.contains(activeTextField.frame.origin) {
        scrollView.scrollRectToVisible(activeTextField.frame, animated: true)
    }
}

@objc
func keyboardWillHide(notification: NSNotification) {
    scrollView.contentInset = UIEdgeInsets.zero
    scrollView.scrollIndicatorInsets = UIEdgeInsets.zero
}

Swift：键盘隐藏了UITextField

2 个答案: