title: react-native UIExplorer will not run in iOS simulator? ( red-box "No script URL provided" )
body: <p>Using Xcode 7.3, I get "No script URL provided" running on an iOS simulator?</p>
  
  <p>I followed <a href="https://github.com/facebook/react-native/tree/master/Examples/UIExplorer" rel="nofollow noreferrer">UIExplorer README.md</a></p>
  
  <pre><code>git clone https://github.com/facebook/react-native.git
  cd react-native
  npm install
  Open Examples/UIExplorer/UIExplorer.xcodeproj in Xcode
  Hit the Run button
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/65oJp.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/65oJp.png" alt="react-native UIExplorer red-box &quot;No script URL provided&quot;"></a></p>
  
  <p>Usually running on iOS simulator runs well.  What am I missing?</p>
  
  <p>My goal is to evaluate NavigatorExperimental in UIExplorer for use on both iOS and Android.</p>
  
  <p>Other examples such as /Examples/Movies/ run fine.</p>
  
  <p>Thanks in advance,</p>