Storyboard - Hiding top bar of navigation controller programmatically

Question

I\'m using a storyboard and I\'m trying to hide a top bar of my main navigation controller when a certain button is pressed (or function is called). I know I have to initial

Answer 1

in swift 4:

self.navigationController!.navigationBar.isHidden = true

something like this:

override func viewDidLoad() {
        super.viewDidLoad()
       self.navigationController!.navigationBar.isHidden = true
    }