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'类型'通知。名称'没有成员'keyboardDidShowNotification'

swift4.2 nsnotificationcenter keyboard-events ios

9

Krunal · 技术社区 · 7 年前

NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardDidShow(notification:)), name: NSNotification.Name.keyboardDidShowNotification, object: nil)

下面的一个在Swift 4上运行良好,但在Swift 4.2上运行不好

NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardDidShow(notification:)), name: NSNotification.Name.UIKeyboardDidShow, object: nil)

苹果文件参考号: NSNotification.Name.keyboardDidShowNotification

2 回复 | 直到 7 年前

1

92

Rakesha Shastri 6 年前

我相信你现在是这样用的。

NotificationCenter.default.addObserver(
    self, 
    selector: #selector(self.keyboardDidShow(notification:)), 
    name: UIResponder.keyboardDidShowNotification, object: nil) 

/* You can substitute UIResponder with any of it's subclass */

UIResponder doc 作为一个 类型属性 .

2

5

Daniel 7 年前

处理swift 4,2

 func bindToKeyboard(){
    NotificationCenter.default.addObserver(self, selector: #selector(UIView.keyboardWillChange(_:)), name:
        UIApplication.keyboardWillChangeFrameNotification
        , object: nil)


}

3

4

Badr Bujbara 5 年前

一些小细节补充了这个答案:

func setupViews(){
            // Keyboard notification observers
        NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardWillShow(notification:)), name: UIResponder.keyboardWillShowNotification, object: nil)

        NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardWillHide(notification:)), name: UIResponder.keyboardWillHideNotification, object: nil) 
    }


    @objc func keyboardWillShow(notification: NSNotification) {
        if let keyboardSize = (notification.userInfo?[UIResponder.keyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue {
            // Do something
        }
    }

    @objc func keyboardWillHide(notification: NSNotification) {
        // Do something
    }

4

Paresh Mangukiya 4 年前

UIResponder.keyboardWillHideNotification 除了使用 NSNotification.Name. SWIFT 5号

NotificationCenter.default.addObserver(self, selector: #selector(KeyboardLayoutConstraint.keyboardWillShowNotification(_:)), name: UIResponder.keyboardWillShowNotification, object: nil)
    
NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardWillHideNotification(_:)), name: UIResponder.keyboardWillHideNotification, object: nil)

当我发出命令时,单击keyboardWillShowNotification并选择jump to definition。

extension UIResponder {

    
    public class let keyboardWillShowNotification: NSNotification.Name

    public class let keyboardDidShowNotification: NSNotification.Name

    public class let keyboardWillHideNotification: NSNotification.Name

    public class let keyboardDidHideNotification: NSNotification.Name

}