title: Stopping an running SKAction - Sprite Kit
body: <p>The following code will animate a rotation.</p>
  
  <pre><code>let something:SKSpriteNode = SKSpriteNode()
  
  func start(){
    let rotateAction = SKAction.rotateToAngle(CGFloat(M_PI), duration: 10.0)
    something.runAction(SKAction.sequence([rotateAction]))
  }
  </code></pre>
  
  <p>Now I want to stop the animation within the animating duration. Is there anything similar to the following? I want to stop the animation when the user touches the screen.</p>
  
  <pre><code>func stop(){
    something.SKAction.stop()
  }
  </code></pre>