objective-c - 如何在 mac 中查找登录和注销事件？

Question

我对这个应用程序开发领域比较陌生。我试图在用户登录和注销事件期间获得通知。我已尝试使用 NSWorkSpaceNotifications，但它对我不起作用。

有人可以帮帮我吗

-(void)logInLogOutNotifications{
    NSNotificationCenter *notCenter;
    notCenter = [[NSWorkspace sharedWorkspace] notificationCenter];
    [notCenter addObserver:self
                  selector:@selector(observerMethod)
                      name:NSWorkspaceWillPowerOffNotification object:nil]; 
}

-(void)observerMethod:(NSNotification *)senderNotification;{

    NSLog(@"System Logout Notification is called***********************");

}

Answer 1

NSApplicationMain 开始 RunLoop。您正在从 main() 函数调用 logInLogOutNotifications 函数，因此您应该运行 runloop。或者在 applicationDidFinishLaunching

中调用 logInLogOutNotifications

-(void)logInLogOutNotifications{
    NSNotificationCenter *notCenter;
    notCenter = [[NSWorkspace sharedWorkspace] notificationCenter];
    [notCenter addObserver:self
                  selector:@selector(observerMethod)
                      name:NSWorkspaceWillPowerOffNotification object:nil]; 
[[NSRunLoop currentRunLoop] run];
}