Navigation bar not showing iOS swift

Question

I am having multiple view controller in my application. I want to hide navigationbar in my first view controller. So I use the following code to hide the navigation

Answer 1

in viewDidLoad method of the view controller in which you don't want to show navigation bar add the line

navigationController.navigationBarHidden = true

you are presently hiding in all view controllers

Edit: You are presenting view controller instead it should be

self.navigationController!.pushViewController(controller)