didFinishLaunchingWithOptions方法，该方法仅创建自定义UIViewController

Posted 2021-02-26

Inside the `AppDelegate`, the `didFinishLaunchingWithOptions` method can be used to just create and use a custom View Controller class.

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    
 
	// create an instance of the view controller
	MyViewController *vc = [[MyViewController alloc] init];
 
	// add the view controllers view to the window
	[window addSubview:[vc view]];
 
	// release vc (we're done with it)
	[vc release];
 
	// make key and visible of course!
	[window makeKeyAndVisible];
 
	// happy times
	return YES;
}