Q:

I have system "NavigationViewController -> MyViewController", and I programmatically want to present MyViewController inside a third view controller. The problem is that I don't have navigation bar in MyViewController after presenting it. Can you help me?

var VC1 = self.storyboard.instantiateViewControllerWithIdentifier("MyViewController") as ViewControllerself.presentViewController(VC1, animated:true, completion: nil)

 

A:

 Calling presentViewController presents the view controller modally, outside the existing navigation stack; it is not contained by your UINavigationController or any other. If you want your new view controller to have a navigation bar, you have two main options:

Option 1. Push the new view controller onto your existing navigation stack, rather than presenting it modally:

let VC1 = self.storyboard!.instantiateViewControllerWithIdentifier("MyViewController") as! ViewControllerself.navigationController!.pushViewController(VC1, animated: true)

 

Option 2. Embed your new view controller into a new navigation controller and present the new navigation controller modally: 

let VC1 = self.storyboard!.instantiateViewControllerWithIdentifier("MyViewController") as! ViewController// Create a navigation controller with VC1 at the root of the navigation stack.let navController = UINavigationController(rootViewController: VC1)self.present(navController, animated:true, completion: nil)

Bear in mind that this option won't automatically include a "back" button. You'll have to build in a close mechanism yourself.

 

Which one is best for you is a human interface design question, but it's normally clear what makes the most sense.