swift5 - 类型 'NSNotification.Name' 没有成员 'UIResponder'

Question

我在 Swift 5 中遇到此错误

NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardWillShow(_:)), name: NSNotification.Name.UIResponder.keyboardWillShowNotification, object: nil)
    NotificationCenter.default.addObserver(self, selector: #selector(self.keyboardWillHide(_:)), name: NSNotification.Name.UIResponder.keyboardWillHideNotification, object: nil)

我也遇到了以下错误

“名称”不是“通知”的成员类型

public let ImagePickerTrayDidHide: Notification.Name = Notification.Name(rawValue: "ch.laurinbrandner.ImagePickerTrayDidHide")

我该如何解决这个问题？

Answer 1

正如我最初猜测的那样，您有以下代码:

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

当您在 Xcode 10.1 中编译它时，您收到以下错误:'keyboardWillShowNotification' 已重命名为 'NSNotification.Name.UIKeyboardWillShow'，请将 'keyboardWillShowNotification' 替换为 'NSNotification.Name.UIKeyboardWillShow'并且“keyboardWillHideNotification”已重命名为“NSNotification.Name.UIKeyboardWillHide”，请将“keyboardWillHideNotification”替换为“NSNotification.Name.UIKeyboardWillHide”。

然后，您按了两次“修复”，并得到了已添加到问题中的错误代码。您应该使用以下内容:

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)