title: Xcode 8 playground live view doesn't work
body: <p>In my Swift playground, I entered the following code to test the live view feature: </p>
  
  <pre><code>let view = UIView()
  
  PlaygroundPage.current.liveView = view
  </code></pre>
  
  <p>But for some reason the live view doesn't display on the right in the Assistant Editor. Initially I thought that Xcode wasn't finished running the playground. But I waited and waited and it still doesn't show. </p>
  
  <p>Screenshot:
  <a href="https://i.stack.imgur.com/s55Qe.png" rel="noreferrer"><img src="https://i.stack.imgur.com/s55Qe.png" alt="enter image description here"></a></p>
  
  <p>Any help?</p>