Question

我知道有一些方法可以在OS X上使用IOKit框架获得系统空闲时间，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大于x，这很好。如果我在几秒钟后检测到空闲模式并不重要。

问题是检测Mac何时不再闲置。我希望我的应用尽快显示通知，而不是几秒钟之后。

有没有办法收到通知？（iChat似乎有一个）

Answer 1

这来自http://developer.apple.com/library/mac/#qa/qa1340/_index.html（来自比尔蜥蜴评论）

- (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];
}

Answer 2

$('form').submit(function(e){
 var name = $(this).find('input[name=name]').val();
 // do smth with name
 return true;
});

系统在OS X上处于空闲状态时的通知

2 个答案: