Example for Rane.

gistfile1.m

- (BOOL)application:(UIApplication *)application 
    didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    self.window.backgroundColor = [UIColor whiteColor];
    
    UIViewController *rootViewController = [[MyUIViewControllerSubclass alloc] init];
    UINavigationController *navController = [[UINavigationController alloc] 
        initWithRootViewController:rootViewController];
    
    // The rootViewController becomes aware of what stack it's in - e.g, it can then do...
    // self.navigationController pushViewController:myNewViewControllerInstance animated:YES];
     
    self.window.rootViewController = navController;
    [self.window makeKeyAndVisible];
    
    return YES;
}