title: What is the alternative method for the "self.isTouchEnabled " in Cocos2d 2.0?
body: <p>When I use the </p>
  
  <pre><code>self.isTouchEnabled = YES
  </code></pre>
  
  <p>in <code>Cocos2d v2.0</code> for the layer could be touched,the Xcode  give me a tip:</p>
  
  <pre><code>setIsTouchEnabled: is deprecated
  </code></pre>
  
  <p>Now, I just want to know alternative method for isTouchEnabled.</p>