title: How to popScene with transitions in cocos2d?
body: <p>When i call relpaceScene or pushScene in cocos2d, I can add some transitions to it like:</p>
  
  <p>[[CCDirector sharedDirector] replaceScene:[CCTransitionFade transitionWithDuration:1 scene:scene]];</p>
  
  <p>but when i call popScene, it takes no parameters, and no transition can be added. Is that so?
  How can i popScene with desired transitions?</p>