title: Changing the colour of a SKShapeNode when touched?
body: <p>I have a game where i touch a node and it runs some code. How do I change the SKShapeNode's color when touched? I tried to use node.fillColor = SKColor.blackcolor() for example but it says that I cannot do that even though thats how i originally created the SKShapeNode's color in the first place. </p>
  
  <p>This is all writing within touches began method.</p>
  
  <pre><code>override func touchesBegan(touches: Set&lt;UITouch&gt;, withEvent event: UIEvent?) { 
      for touch: AnyObject in touches { 
          let positionOfTouch = touch.locationInNode(self) 
          let node = nodeAtPoint(positionOfTouch)         
          node.userInteractionEnabled = true 
          node.fillColor = UIColor.whiteColor() 
  </code></pre>
  
  <p>This is the code I am using. But it keeps saying "Value of type SKNode has no member "fillColor"...But "fillColor" works in my DidMoveToView.
  Thanks</p>