title: Automatically add "back" button in navigation bar
body: <p>First of all: I'm using Swift 5 with Xcode 10 (iOS 12.0).</p>
  
  <p>I'm pretty new to Swift/iOS development and watched a couple of videos on how to add a "back" button to the navigation bar. In all of them (with Swift 3) the button just magically appears once the app is run after adding a segue (between an item in the first scene and the second scene) and a title for both navigation bars.</p>
  
  <p>My app has three ViewControllers/scenes:</p>
  
  <ol>
  <li>Login without navigation bar ("login" button: segue to scene 2)</li>
  <li>Table View (linked to scene 3 with segue, so I can just tap on an item in the list)</li>
  <li>Further information for a single item in the Table View</li>
  </ol>
  
  <p>The segue between scene 2 and 3 is set to "show (e.g. push)" because "push" is deprecated and crashes the app.</p>
  
  <p>I added both navigation bars to the navigation controllers (2 &amp; 3) by hand and want to add an arrow icon to the navigation bar of scene 3. What I've tried so far:</p>
  
  <ul>
  <li>Add titles for the navigation bar in both scenes</li>
  <li>Set the "Back button" attribute (Navigation bar text), which created a child object</li>
  <li>Then set the child object's "Image" attribute</li>
  <li>Set the "Back" and "Back Mask" attribute (Navigation bar) to the same image</li>
  </ul>
  
  <p>Nothing shows up though, neither in Xcode nor in the simulator (not even the image).</p>
  
  <p>Is it even still possible to get an automatic "back" button or do you now have to add it yourself using a "Bar Button Item"?</p>