title: calling methods from imported files (Objective-C)
body: <p>I am working with SpriteKit and need to call a method from MyScene.m within ViewController.m I have the interface set up with the method, and I create a MyScene object in ViewController interface. The problem is that I am getting the following error:</p>
  
  <pre><code>Terminating app due to uncaught exception 'NSUnknownKeyException', reason: 
  '[&lt;ViewController 0x9e3d5b0&gt; setValue:forUndefinedKey:]:
  this class is not key value coding-compliant for the key SwipeLeftRight.'
  </code></pre>
  
  <p>I feel like I must be missing something simple but I don't see it. Please help!</p>