macos - OS X 上系统空闲或不空闲时的通知

Question

我知道有一些方法可以通过 OS X 上的 IOKit 框架获取系统空闲时间，但我想知道是否有可用的通知。

我可以创建一个计时器来检查空闲时间是否超过x，这很好。如果我几秒钟后检测到空闲模式也没关系。

问题是检测 Mac 何时不再空闲。我希望我的应用程序尽快显示通知，而不是几秒钟后。

有没有办法收到通知？ (iChat好像有一个)

Answer 1

这是来自http://developer.apple.com/library/mac/#qa/qa1340/_index.html (来自蜥蜴比尔评论)

- (void) receiveSleepNote: (NSNotification*) note
{
    NSLog(@"receiveSleepNote: %@", [note name]);
}

- (void) receiveWakeNote: (NSNotification*) note
{
    NSLog(@"receiveWakeNote: %@", [note name]);
}

- (void) fileNotifications
{
    //These notifications are filed on NSWorkspace's notification center, not the default 
    // notification center. You will not receive sleep/wake notifications if you file 
    //with the default notification center.
    [[[NSWorkspace sharedWorkspace] notificationCenter] addObserver: self 
            selector: @selector(receiveSleepNote:) 
            name: NSWorkspaceWillSleepNotification object: NULL];

    [[[NSWorkspace sharedWorkspace] notificationCenter] addObserver: self 
            selector: @selector(receiveWakeNote:) 
            name: NSWorkspaceDidWakeNotification object: NULL];
}