iOS 创建空工程，不使用 Storyboard

ios_create_empty_prj

// First Config: target -> general -> Deployment Info -> Main Interface (Clear!)
// Then can move the Main.storyboard

// Only ViewController
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
ViewController *viewController = [[ViewController alloc] init];
self.window.rootViewController = viewController;
[self.window makeKeyAndVisible];

// With Navigation Controller
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
ViewController *viewController = [[ViewController alloc] init];
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:viewController];
self.window.rootViewController = navigationController;
[self.window makeKeyAndVisible];