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swift5 - 类型“NSNotification.Name”没有成员“UIResponder”

问题描述

我在使用 Swift 5 时遇到了这个错误

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)

在此处输入图像描述

我也遇到了错误

“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？

标签： swift5

解决方案

正如我最初猜想的那样，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' has been renamed to 'NSNotification.Name.UIKeyboardWillShow', Replace 'keyboardWillShowNotification' with 'NSNotification.Name.UIKeyboardWillShow'和'keyboardWillHideNotification' has been renamed to 'NSNotification.Name.UIKeyboardWillHide', Replace 'keyboardWillHideNotification' with 'NSNotification.Name.UIKeyboardWillHide'.

然后你按了两次“修复”，得到了你已经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)

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