ios – 不推荐使用Objective-C选择器的字符串文字,请改用’#selector’

我有以下代码：

func setupShortcutItems(launchOptions: [NSObject: AnyObject]?) -> Bool {
    var shouldPerformAdditionalDelegateHandling: Bool = false

    if (UIApplicationShortcutItem.respondsToSelector("new")) {
        self.configDynamicShortcutItems()

        // If a shortcut was launched,display its information and take the appropriate action
        if let shortcutItem: UIApplicationShortcutItem = launchOptions?[UIApplicationLaunchOptionsShortcutItemKey] as? UIApplicationShortcutItem {
            // When the app launched at the first time,this block can not called.
            self.handleShortCutItem(shortcutItem)

            // This will block "performActionForShortcutItem:completionHandler" from being called.
            shouldPerformAdditionalDelegateHandling = false
        } else {
            // normal app launch process without quick action
            self.launchWithoutquickaction()
        }
    } else {
        // Less than iOS9 or later
        self.launchWithoutquickaction()
    }

    return shouldPerformAdditionalDelegateHandling
}

我在UIApplicationShortcutItem.respondsToSelector(“new”)上得到以下“警告”,它说：

Use of string literal for Objective-c selectors is deprecated,use ‘#selector’ instead

警告会自动替换代码：

UIApplicationShortcutItem.respondsToSelector(#selector(FBSDKAccesstoken.new))

但是,由于new()不可用,因此无法编译.
在这种情况下我应该用什么？

解决方法

Xcode 7.3使用swift for iOS9.3 / watchOS2.2 / …

如果您以前使用过这一行代码：

NSNotificationCenter.defaultCenter().addobserver(self,selector: "updateResult:",name: "updateResult",object: nil)

您现在应该使用这一行代码：

NSNotificationCenter.defaultCenter().addobserver(self,selector: #selector(InterfaceController.updateResult(_:)),object: nil)

至少这是Xcode在代码中改变了几个字符后提供给我的.看起来似乎并不总是提供正确的解决方案,当你出现这个错误.