title: Why does "Tab Bar Controller" not show icons?
body: <p>I am currently doing the <a href="http://www.raywenderlich.com/50308/storyboards-tutorial-in-ios-7-part-1" rel="nofollow noreferrer">Ray Wenderlich tutorial about Tab Bar Controllers</a> for iOS in XCode 6. </p>
  
  <p>There's a step that describes how to re-order the tab icons on the bottom bar (cp. following figure):</p>
  
  <p><img src="https://i.stack.imgur.com/HHG3j.png" alt="enter image description here"></p>
  
  <p><strong>But these buttons are not visible on my Interface Builder (cp. following image):</strong></p>
  
  <p><img src="https://i.stack.imgur.com/rHACZ.png" alt="enter image description here"></p>
  
  <p><strong>Any ideas why?</strong></p>