how to use to uiviewcontroller without xib file - ios

Question

I have one question about transition.
we use this code when we want to transition to next UIViewController:
UIViewController* secondViewController = [[UIViewController alloc] initWithNibName:#"SecondViewControllerName" bundle:[NSBundle mainBundle]];
[self.navigationController pushViewController:secondViewController animated:YES];
or
when we want to add NavigationController using this code:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
ViewController *viewController = [[ViewController alloc] initWithNibName:#"ViewController" bundle:nil];
UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:viewController];
self.window.rootViewController = navController;
[self.window makeKeyAndVisible];
return YES;
}
or
when we want add UIViewController to another UIViewController using this code:
UIViewController* secondViewController = [[UIViewController alloc] initWithNibName:#"SecondViewControllerName" bundle:[NSBundle mainBundle]];
[self.view addSubview:secondViewController.view];
now I want to know that if I don't use xib file in my project what to do???

Answer 1

You could use ViewController from Storyboard
ViewController *controller = (ViewController *)[self.storyboard instantiateViewControllerWithIdentifier:#"yourIdentifier"];
or create normally
// make Layout in viewController - viewDidLoad
ViewController *viewController = [[ViewController alloc] init];
ViewController.m
- (void)viewDidLoad
{
[super viewDidLoad];
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0.0, 64.0, 320.0, 24.0)];
label.textColor = [UIColor blackColor];
label.text = #"My text";
[self.view addSubview:label];
UIButton *button = ...;
[self.view addSubview:button];
}