ios - 类型 'ChatViewController' 没有成员 'showOrHideKeyboard'

Question

我好像找不到我做的函数。

Error: Type 'ChatViewController' has no member 'showOrHideKeyboard'

代码:

override func viewDidAppear(_ animated: Bool) {
    super.viewDidAppear(animated)
    NotificationCenter.defaultCenter.addObserver(self, selector: #selector(ChatViewController.showOrHideKeyboard(_:)), name: UIKeyboardWillShowNotification, object: nil)
    NotificationCenter.defaultCenter.addObserver(self, selector: #selector(ChatViewController.showOrHideKeyboard(_:)), name: UIKeyboardWillHideNotification, object: nil)
}

@IBOutlet weak var contraintToBottom: NSLayoutConstraint!

func showOrHideKeyboard(notification: NSNotification) {
    if let keyboardInfo: Dictionary = notification.userInfo {
        if notification.name == UIResponder.keyboardWillShowNotification {
            UIView.animate(withDuration: 1, animations: { () in
                self.contraintToBottom.constant = (keyboardInfo[UIResponder.keyboardFrameEndUserInfoKey] as! NSValue).cgRectValue.height
                self.view.layoutIfNeeded()
            }) { (completed: Bool) -> Void in
                //
            }
        }
    }
}

Answer 1

你应该用objc标记选择器方法

改变这一行

func showOrHideKeyboard(notification: NSNotification) {
}

到这一行

@objc func showOrHideKeyboard(_ notification: NSNotification) {
}