title: How to change back button text in Navigation item to picture in xcode
body: <p>I have the back button in my <code>navigation bar</code> in my app</p>
  
  <p>I want to override the back text that it's doing by default
  to an icon I have in my project (Recourses folder)</p>
  
  <p>How do I refer to that back button 
  and how do I change it to an icon instead ?</p>
  
  <p>This is the button now >
  <a href="https://i.stack.imgur.com/Evtdc.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Evtdc.png" alt="enter image description here"></a></p>
  
  <p>and this is what I want to change it to: </p>
  
  <p><a href="https://i.stack.imgur.com/UD8gh.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/UD8gh.png" alt="enter image description here"></a></p>