1. Create your own ViewController in your application
2. Add @property (strong, nonatomic) UINavigationController *navController in your AppDelegate.h
3. Add the following codes inside 'didFinishLaunchingWithOptions'
UIViewController *viewController = [[YourVC alloc] init];
OR
[[NSClassFromString(@"YourVC") alloc] initWithNibName:@"YourVC" bundle:nil];
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.window.backgroundColor = [UIColor whiteColor];
self.navController = [[UINavigationController alloc] initWithRootViewController:viewController];
self.navController.navigationBar.autoresizingMask = UIViewAutoresizingFlexibleTopMargin;
[self.window setRootViewController:self.navController];
[UIApplication sharedApplication].statusBarHidden = YES; // If needed
[self.window makeKeyAndVisible];
return YES;
