title: How to set the navigation bar title from view controllers inside tabs?
body: <p>I have a tab bar controller embedded in a navigation controller.
  I want to set the title in the navigation from the view controllers inside the tabs.</p>
  
  <p>If I use:</p>
  
  <pre><code>self.title = "ABC";
  </code></pre>
  
  <p>or</p>
  
  <pre><code>self.tabBarItem.title = "ABC";
  </code></pre>
  
  <p>the title of the tab at the bottom is set to "ABC", but not the title in the navigation bar at the top.</p>
  
  <p>However, I only want to set the title in the navigation bar, not the tabs at the bottom.</p>
  
  <p>How can I do that?</p>
  
  <p><img src="https://i.stack.imgur.com/zVqo0.png" alt="enter image description here"></p>