title: cocos2d extend touch area from a button
body: <p>I got some radiobuttons but the toucharea is to small. The toucharea depends on the image size. Is there an elegant way to extend the touch area with cocos2d without using a bigger image or make my own touch areas with cgrect?
  setContentSize do what I want. Unfortunately the image moves to the left bottom corner of the contentsize. Set the anchorpoint moves the contentsize around but the image stays in the left bottom corner.</p>
  
  <pre><code>    CCMenuItem* pickEasy = [CCMenuItemImage itemFromNormalImage:@"radiobutton_off.png" selectedImage:@"radiobutton_on.png" target:self selector:@selector(pickEasyTapped:)];
      pickEasy.position = ccp(ss.width * 0.40, ss.height * 0.78);
      [pickEasy setContentSize:CGSizeMake(50, 50)];
  </code></pre>
  
  <p>Thanks in advance. </p>