在 Swift OS X 中无法接收 NSWorkspaceDidWakeNotification

Question

我正在制作一个 macOS 应用程序，它需要在计算机唤醒、入睡和唤醒时做一些事情，但我无法让监听器工作。我觉得我已经尝试了一切。在 AppDelegate.swift 函数 applicationDidFinishLaunching 的内部，我有：

NSWorkspace.sharedWorkspace().notificationCenter.addObserver(self, selector: "sleepListener", name: NSWorkspaceWillSleepNotification, object: nil)
NSWorkspace.sharedWorkspace().notificationCenter.addObserver(self, selector: "wakeUpListener", name: NSWorkspaceDidWakeNotification, object: nil)

在 AppDelegate.swift 内部但在函数 applicationDidFinishLaunching 之外，我有：

func sleepListener(aNotification : NSNotification) {
    print("Sleep Listening");
}

func wakeUpListener(aNotification : NSNotification) {
    print("Wake Up Listening");
}

我尝试了很多不同的组合来解决这个问题。我试过听 NSNotificationCenter.defaultCenter()，我试过将选择器更改为 sleepListener: 和 wakeUpListener:，我试过从两个函数中删除参数，但到目前为止没有任何效果。真正有趣的是，我有另外两个监听器可以完美地工作，NSWorkspaceScreensDidSleepNotification 和 NSWorkspaceScreensDidWakeNotification，通过调用它们

NSWorkspace.sharedWorkspace().notificationCenter.addObserver(self, selector: "screenSleepListener", name: NSWorkspaceScreensDidSleepNotification, object: nil)

和

NSWorkspace.sharedWorkspace().notificationCenter.addObserver(self, selector: "screenWakeUpListener", name: NSWorkspaceScreensDidWakeNotification, object: nil)

引用函数

func screenSleepListener() {
    print("Screen Sleep Listening");
}

func screenWakeUpListener() {
    print("Screen Wake Up Listening");
}

所以，这是我做错了什么吗？这是我应该提交错误报告的事情吗？如果其他人可以运行文件中的此代码，让他们的显示器和计算机进入睡眠状态，然后查看他们是否会遇到相同的错误，那将非常有帮助。如果有人知道我做错了什么，那就更好了。

提前致谢！

Answer 1

我看到这个post是很久以前的了。

从您的 post 来看，我的印象是您按错误的顺序进行了两次排列。

    NSWorkspace.sharedWorkspace().notificationCenter.addObserver(self, selector: "sleepListener", name: NSWorkspaceWillSleepNotification, object: nil)
    NSWorkspace.sharedWorkspace().notificationCenter.addObserver(self, selector: "wakeUpListener", name: NSWorkspaceDidWakeNotification, object: nil)
func sleepListener() {
    print("Sleep Listening");
}

func wakeUpListener() {
    print("Wake Up Listening");
}

或

NSWorkspace.sharedWorkspace().notificationCenter.addObserver(self, selector: "sleepListener:", name: NSWorkspaceWillSleepNotification, object: nil)
        NSWorkspace.sharedWorkspace().notificationCenter.addObserver(self, selector: "wakeUpListener:", name: NSWorkspaceDidWakeNotification, object: nil)

func sleepListener(aNotification : NSNotification) {
    print("Sleep Listening");
}

func wakeUpListener(aNotification : NSNotification) {
    print("Wake Up Listening");
}

或者甚至更好

NSWorkspace.sharedWorkspace().notificationCenter.addObserver(self, selector: "sleepListener:", name: NSWorkspaceWillSleepNotification, object: nil)

NSWorkspace.sharedWorkspace().notificationCenter.addObserver(self, selector: "sleepListener:", name: NSWorkspaceDidWakeNotification, object: nil)

 func sleepListener(aNotification : NSNotification) {
            if aNotification.name == NSWorkspaceWillSleepNotification{
                print("Going to sleep")
            }else if aNotification.name == NSWorkspaceDidWakeNotification{
                print("Woke up")
            }else{
                print("Some other event other than the first two")
            }
        }

在何处添加这些观察者也很重要。对我来说，他们都在 app delegate 中并且他们都工作了。

希望对您有所帮助

Answer 2

Swift 5:

func applicationDidFinishLaunching(_ aNotification: Notification) {  
    NSWorkspace.shared.notificationCenter.addObserver(self, selector: #selector(sleepListener(_:)),  
                                                      name: NSWorkspace.willSleepNotification, object: nil)  
    NSWorkspace.shared.notificationCenter.addObserver(self, selector: #selector(sleepListener(_:)),  
                                                      name: NSWorkspace.didWakeNotification, object: nil)  
}  


@objc private func sleepListener(_ aNotification: Notification) {  
    print("listening to sleep")  
    if aNotification.name == NSWorkspace.willSleepNotification {  
        print("Going to sleep")  
    } else if aNotification.name == NSWorkspace.didWakeNotification {  
        print("Woke up")  
    } else {  
        print("Some other event other than the first two")  
    }  
}

在 Swift OS X 中无法接收 NSWorkspaceDidWakeNotification

Cannot receive NSWorkspaceDidWakeNotification in Swift OS X

macos

notifications

nsnotificationcenter

nsworkspace

swift