修复 - 键盘移动整个集合视图留下空白

Question

在我的Collection ViewController 中有Collection View Cell 和textField。每次我按下textField 并且键盘出现时，view 都会向上移动，留下空白...

显示键盘之前 everything is ok

显示键盘后 cell layout is up... 并且您无法看到整个单元格内容。

我在下面尝试了一个答案解决方案，我得到了这个：black view on top

Answer 1

您可以在键盘显示和隐藏时添加观察者，并相应地改变您的视图：

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

@objc func keyboardWillShow(notification: NSNotification) {
    if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue {
        let newYOrigin = CGFloat(100) // or whatever new value you want
        self.yourView.frame.origin.y = newYOrigin
    }
}

@objc func keyboardWillHide(notification: NSNotification) {
    if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue {
        let newYOrigin = CGFloat(0) // or whatever new value you want
        self.yourView.frame.origin.y = newYOrigin
    }
}