如何將 NSWorkspace 通知遷移到 Swift 4？

Question

在 Swift 3 中，我使用以下代碼注冊了睡眠和喚醒通知：

let notificationCenter = NSWorkspace.shared.notificationCenter
notificationCenter.addObserver(self, selector: #selector(AppDelegate.sleepListener), name: NSNotification.Name.NSWorkspaceWillSleep, object: nil)
notificationCenter.addObserver(self, selector: #selector(AppDelegate.wakeUpListener), name: NSNotification.Name.NSWorkspaceDidWake, object: nil)

但是在遷移到 Swift 4 后，我在應用建議的修復程序后收到此錯誤：

Type 'NSNotification.Name' has no member 'NSWorkspace'

我如何在 Swift 4 中做到這一點？

Answer 1

要解決此問題，您需要將引用通知名稱的代碼從NSNotification.Name.NSWorkspaceWillSleep為NSWorkspace.willSleepNotification 。 Swift 4 版本是：

let notificationCenter = NSWorkspace.shared.notificationCenter
notificationCenter.addObserver(self, selector: #selector(AppDelegate.sleepListener), name: NSWorkspace.willSleepNotification, object: nil)
notificationCenter.addObserver(self, selector: #selector(AppDelegate.wakeUpListener), name: NSWorkspace.didWakeNotification, object: nil)

您可以在此處查看 Apple 對此更改的 API 差異。