title: Navigation bar disappears in a push segue loop
body: <p>I am using Storyboards</p>
  
  <p>I have 3 view controllers (A, B, and C) that I want to have arranged, so that each one segues into another; like a directed triangle.</p>
  
  <p>A is reached from another controller (lets call it A'), it segues into B, and that segues into C; and I want C to segue back to A. </p>
  
  <p>A' is embedded into a navigation controller, and so A,B and C have a bar as well. However when I make a segue from C to A, that bar disappears from all three view controllers.</p>
  
  <p>How do I prevent this from happening? Should I add a UINavigationBar to each of the 3 controllers? </p>