iOSStoryboard

Introduction

Normally, view controllers in a storyboard are instantiated and created automatically in response to actions defined within the storyboard itself. However, you can use a storyboard object to instantiate the initial view controller in a storyboard file or instantiate other view controllers that you want to present programmatically. Below you will find examples of both use cases.

Initialize

//Swift    
let storyboard = UIStoryboard(name: "Main", bundle: NSBundle.mainBundle()) 

//Objective-c
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:[NSBundle mainBundle]];

Fetch Initial ViewController

//Swift
let initialScreen = storyboard.instantiateInitialViewController()

//Objective-c
UIViewController *initailScreen = [storyboard instantiateInitialViewController];

Fetch ViewController

//Swift    
let viewController = storyboard.instantiateViewControllerWithIdentifier("identifier")

//Objective-c
UIViewController *viewController = [storyboard instantiateViewControllerWithIdentifier:@"identifier"];