Question

当键盘在iOS中与UITextField重叠时，我正在使用以下代码来解决常见问题：

    @IBOutlet var scrollView: UIScrollView!

    var activeField: UITextField?

    override func viewWillAppear(_ animated:Bool) {
    super.viewWillAppear(animated)

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

    func textFieldDidBeginEditing(_ textField: UITextField) {

    activeField = textField
}

func textFieldDidEndEditing(_ textField: UITextField) {

    activeField = nil
}

键盘通知

    func keyboardWillHide(_ notification: Notification) {

    var info = notification.userInfo!
    let keyboardSize = info[UIKeyboardFrameEndUserInfoKey] as? CGRect
    let contentInsets: UIEdgeInsets = UIEdgeInsetsMake(0.0, 0.0, -keyboardSize!.height , 0.0)
    scrollView.contentInset = contentInsets
}

func keyboardWillShow(_ notification: Notification) {
    var info = notification.userInfo!
    let keyboardSize = info[UIKeyboardFrameEndUserInfoKey] as? CGRect
    let contentInsets: UIEdgeInsets = UIEdgeInsetsMake(0.0, 0.0, keyboardSize!.height + 8, 0.0)
    scrollView.contentInset = contentInsets
}

它就像魔术一样。

但是我面临以下问题。在文本编辑后隐藏键盘时，视图将返回到之前的状态，应该是这样，但是滚动被禁用。我不知道为什么。我设置了scrollView.isScrollEnabled = true，但是它不能解决我的问题。

我该如何摆脱呢？

Answer 1

此行是错误的（嗯，整个事情是错误的，但这是您抱怨的特定行）：

let contentInsets: UIEdgeInsets = UIEdgeInsetsMake(0.0, 0.0, -keyboardSize!.height, 0.0)

更好的

let contentInsets: UIEdgeInsets = .zero

更好的是，当键盘显示时，保存内容插图。隐藏时，将它们还原为您保存的值。

当键盘隐藏在Swift中时，UISrollView被禁用

1 个答案: