title: iPhone app Action Button
body: <p>I need to add an action button in my iPhone application. When that one is clicked the UIActionSheet with buttons need to be popped up. 
  Can any one tell me how to add an action button? - means is there any in built action button   for iPhone app? or do we need to create a new button with image?</p>
  
  <p>Thanks in advance!</p>