title: Popup dialog with round corners
body: <p>I want to create a popup dialog that show in center of a screen. Currently I use a UIView that load manually from a NIB and add as a sub view onto my main view. Is there a better proper way?</p>
  
  <p>I also need to fade out the back ground main view and have round corners on this popup dialog.</p>
  
  <p>Target iOS 6 and later</p>
  
  <p>How do I do this?</p>