title: Add a button next to the back button
body: <p>in iOS, is it possible to add a button next to the default back button (the one that is automatically created when you use the method <code>pushViewController</code>)</p>
  
  <p><img src="https://i.stack.imgur.com/sY7sz.png" alt="I would like to add a button here !"></p>
  
  <p>I've tried to use the methods <code>setLeftBarButtonItems</code> and <code>setBackBarButtonItem</code> but in vain - whenever I set the left bar button items, the default back button disappears.</p>
  
  <p>Thanks for your help!</p>