Mac OS Xでスリープ、復帰時の通知を扱う

Objective-CでOS Xがスリープ、復帰するときの通知を受け取るには。

ここに書いてあった。

Registering and unregistering for sleep and wake notifications

- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
    // Setup system event notifications
    [self fileNotifications];
}
- (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: nil];

    [[[NSWorkspace sharedWorkspace] notificationCenter] addObserver: self
                                                           selector: @selector(receiveWakeNote:)
                                                               name: NSWorkspaceDidWakeNotification object: nil];
}
- (void) receiveSleepNote: (NSNotification*) note
{

    NSLog(@"Sleep");

}

- (void) receiveWakeNote: (NSNotification*) note
{

    NSLog(@"Awake");
}