title: Adding new tabs to a tab bar controller
body: <p>I am creating a tab bar iOS app. The tab bar view controller has two tabs, each of them connected to a view controller.</p>
  
  <p>This how it looks:</p>
  
  <p><img src="https://i.stack.imgur.com/prmDk.png" alt="enter image description here"></p>
  
  <p>I need to add more tabs to the tab controller. I am doing it at the storyboard as follows:</p>
  
  <ol>
  <li>I add a new view controller.</li>
  <li>I control-drag from the tab bar controller to the new created view controller.</li>
  <li>A window opens and I select Relationship Segue-View Controller.</li>
  <li>The segue from the tab bar controller to the new view controller is created.</li>
  </ol>
  
  <p>I think that is the way to do it, but after that the tab bar controller doesn't show any tab icons, the tab bar becomes grey.</p>
  
  <p>Like this:</p>
  
  <p><img src="https://i.stack.imgur.com/eOOz4.png" alt="enter image description here"></p>
  
  <p>I need to know what am I doing wrong. </p>