title: Importing .mm file to another .mm file on xcode
body: <p>I am getting error when trying to import  .mm file to another one.
  Its build like that :</p>
  
  <p>first class <code>FailedMenuLayer</code> is .mm and have in its .h :</p>
  
  <pre><code>#import "gameScene.h"
  </code></pre>
  
  <p>second class  <code>gameScene</code> is .mm, and have in its .h :</p>
  
  <pre><code>#import "FailedMenuLayer.h"
     FailedMenuLayer *menuGO; //here i get the error: unknown type FailedMenuLayer .
  </code></pre>
  
  <p>why is that ?</p>