Exit runloop and restart application

I have a runloop that loop a method.I want to exit runloop and restart application in certain cases.how do that?

my runloop source :

Code:

 NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:0.2 target:object selector:@selector(objectMethod) userInfo:nil repeats:YES];
            [[NSRunLoop currentRunLoop] addTimer:timer forMode:NSDefaultRunLoopMode];
            [[NSRunLoop currentRunLoop] run];

 

I use this code snippet in application source code :

Code:

NSDictionary *activeApp = [[NSWorkspace sharedWorkspace] activeApplication];
            appName = (NSString*)[activeApp objectForKey:@"NSApplicationName"];

i use this code for getting active(focused application's) name.application works good but when i logout and login again appName variable got null value!

* this code snippet exist in the runlooped method.

I find out when restart the daemon,it's works well! first i unload the daemon and load again with blow commands :

Code:

launchctl unload /Library/LaunchDaemons/daemon.plist

Code:

launchctl load /Library/LaunchDaemons/daemon.plist

I have another daemon(second daemon) like mentioned daemon when first daemon got null second daemon restart first daemon.but not works!

i use mentioned commands in second daemon like below :

Code:

 system("launchctl unload /Library/LaunchDaemons/daemon.plist");

Code:

  system("/bin/launchctl load /Library/LaunchDaemons/daemon.plist");

but these commands can't restart daemon.when i remove load command unload command works.

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Yes,i want to relaunch application again and exit() first process of application.