Local notifcication at regular interval

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Add the navigation controller's view to the window and display.
    [NSThread detachNewThreadSelector:@selector(scheduleLocalNotifications) toTarget:self withObject:nil];
    [window addSubview:navigationController.view];
    [window makeKeyAndVisible];

    return YES;
}
-(void) scheduleLocalNotifications{
    for (int i = 0; i < 60; i++)
    {
        UILocalNotification *localNotif = [[UILocalNotification alloc] init];
        if (localNotif == nil)
            return;
        NSDate *sleepDate = [[NSDate date] dateByAddingTimeInterval:i * 60];
        NSLog(@"Sleepdate is: %@", sleepDate);

        localNotif.fireDate = sleepDate;    

        NSLog(@"fireDate is %@",localNotif.fireDate);
        localNotif.timeZone = [NSTimeZone defaultTimeZone];
        localNotif.alertBody = [NSString stringWithFormat:NSLocalizedString(@"This is local notification %i"), i];

        localNotif.alertAction = NSLocalizedString(@"View Details", nil);
        localNotif.soundName = UILocalNotificationDefaultSoundName;
        localNotif.applicationIconBadgeNumber = 1;

        [[UIApplication sharedApplication] scheduleLocalNotification:localNotif];
        NSLog(@"scheduledLocalNotifications are %@", [[UIApplication sharedApplication] scheduledLocalNotifications]);
        [localNotif release];

    }
}