Navigation Controller from a View Controller

Question

I'm using .xib files in an app. And I want to have two view controllers normal way and from the third view controller, embed it in a navigation view controller. Here's an illustration of how I want it.

enter image description here

I know I can embed a navigation controller in a modally presented view controller like this.

let firstVC = FirstViewController(nibName: firstViewController, bundle: nil)
let navController = UINavigationController(rootViewController: firstVC)
presentViewController(navController, animated: true, completion: nil)

But if I embed it in a navigation controller and push it, the app crashes with the error Pushing the same view controller instance more than once is not supported.

let firstVC = FirstViewController(nibName: firstViewController, bundle: nil)
let navController = UINavigationController(rootViewController: firstVC)
navController.pushViewController(firstVC, animated: true)

Is it possible to do this at all? If so, can someone please explain how?

Thank you.

NOTE: Don't confuse the code snippets with the diagram above. The firstViewController in the code is not the first view controller in the diagram.

Are you referring firstViewController as the first image in above diagram? If so how are you navigating through first image to second? Through presenting? — uiroshan
Oh no no, the code snippet is not related to the diagram above. Sorry I forgot to mention that. — Isuru

Ardra Thambi Ardra Thambi · Accepted Answer · 2014-09-09T12:27:03

Suppose that FirstViewcontroller,Secondviewcontroller,Thirdviewcontroller are the three view controllers. then the transition from second to third view controller use the code given below.

Secondviewcontroller *second=[[Secondviewcontroller alloc]init];
UINavigationController *nav=[[UINavigationController alloc]initWithRootViewController: second];
[self presentViewController:nav animated:NO completion:nil];

Navigation Controller from a View Controller

2 Answers