NotificationCenter将swift 3迁移到swift 4.2问题

Question

我在尝试将我的代码片段从Swift 3迁移到Swift 4.2时遇到了麻烦

这是要迁移的当前代码:

fileprivate func observeKeyboardNotifications() {

    NotificationCenter.default.addObserver(self, selector: #selector(keyboardShow), name: .UIKeyboardWillShow, object: nil)

    NotificationCenter.default.addObserver(self, selector: #selector(keyboardHide), name: .UIKeyboardWillHide, object: nil)
}

这是我设法做的事情:

fileprivate func observeKeyboardNotifications() {

    NotificationCenter.default.addObserver(self, selector: #selector(keyboardShow), name: NSNotification.Name.UIResponder.UIKeyboardWillShowNotification, object: nil)

}

我仍然得到错误:

Type of expression is ambiguous without more context

我一整天都在编码,所以我甚至无法看到这段代码出了什么问题.任何人都可以帮我解决这个问题吗？

Answer 1

你制造的东西太复杂了......

使用此代码,Xcode 10将向您显示正确的修复建议.

fileprivate func observeKeyboardNotifications() {

    NotificationCenter.default.addObserver(self, selector: #selector(keyboardShow),
                                           name: UIKeyboardWillShowNotification, object: nil)

}

我的Xcode 10已将其修复为:

fileprivate func observeKeyboardNotifications() {

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

}