ios - 显示键盘时向上移动 View ，用于堆栈 View 中的文本字段

Question

我有一个场景，当键盘出现时我将 View 向上移动，这个场景工作正常，但是一旦我开始键入， View 就会回到原来的位置。需要注意的是，文本字段位于堆栈 View 中。

我的问题是，有没有一种方法可以阻止 View 在文本编辑开始时返回到其原始位置。

这是我的代码:

override func viewDidLoad() {

    super.viewDidLoad()

    NotificationCenter.default.addObserver(self, selector:#selector(self.keyboardWillShow), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
    NotificationCenter.default.addObserver(self, selector:#selector(self.keyboardWillHide), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
}

 var isScroll = false


@objc func keyboardWillShow(sender: NSNotification) {
    mainView.frame.origin.y = -100
}
@objc func keyboardWillHide(sender: NSNotification) {
    mainView.frame.origin.y = 0
}

Answer 1

添加一个 ScrollView 作为你的基础 View ，然后在里面添加你的内容 View

func keyboardShown(_ notification: Notification){

    var userInfo        = notification.userInfo!
    let keyboardSize    = (userInfo[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue
    let contentInsets   = UIEdgeInsetsMake(0.0, 0.0, (keyboardSize!.height + 40), 0.0)
    self.mainScrollView.contentInset            = contentInsets
    self.mainScrollView.scrollIndicatorInsets   = contentInsets



    // **-- Scroll when keyboard shows up
    let aRect           = self.view.frame
    self.mainScrollView.contentSize = aRect.size

    /* if((self.activeTextField) != nil)
     {
     self.scrollView.scrollRectToVisible(self.activeTextField!.frame, animated: true)
     }*/

}

func keyboardHidden(_ notification: Notification) {

    let contentInsets   = UIEdgeInsets.zero
    self.mainScrollView.contentInset            = contentInsets
    self.mainScrollView.scrollIndicatorInsets   = contentInsets

    // **-- Scroll when keyboard shows up
    self.mainScrollView.contentSize = self.containerView.frame.size
}