title: iOS10.3.1 - <Cordova/CDVViewController.h> file not found - After Upgrade
body: <p>I was running an ionic app successfully, but when i upgraded to iOS10.3.1 and Xcode 8.3.1 then whenever i create a new project and build it
  i get the error </p>
  
  <pre><code>&lt;Cordova/CDVViewController.h&gt; file not found
  </code></pre>
  
  <p>How to fix this. How to downgrade to lower versions.</p>
  
  <pre><code>Cordova CLI: 6.5.0 
  Ionic CLI Version: 2.2.1
  Ionic App Lib Version: 2.2.0
  iOS : 4.3.1
  </code></pre>