title: buttons and menu items in cocos2d/objective-c
body: <p>In my app, I'd like a method called whenever the user taps the screen (anywhere on the screen). Normally, I'd make a transparent UIButton that covers the whole screen.</p>
  
  <p>If I'm using the cocos2d framework, what's the best way to do this? Is it good practice to still use UIButtons? I've been reading about MenuItems but haven't found an easy way to make one giant fully transparent menu item?</p>
  
  <p>Thanks.</p>