title: How to Force Back Button to Go to First View Controller (swift)
body: <p>I have storyboard of several view controllers embedded in Navigation Controller.
  Due to navigation logic in later views of storyboard, the back button (in the left upper corner, in navigation bar) does not go back to the first view. I am wondering where and how to change this behaviour of Back button of second view only. Appreciate any ideas, examples.</p>
  
  <p><img src="https://i.stack.imgur.com/45fFk.png" alt="enter image description here"></p>