title: Display a bottom menu
body: <p>How can display a menu in the bottom of the screen?
  I have an UIImagePickerController and I want to let user select the source type. I want 3 buttons: "Take from photo library", "Take from camera", "Cancel".</p>
  
  <p>Here is a screenshot of what I want:
  <a href="http://i.stack.imgur.com/e3JoQ.jpg" rel="nofollow">http://i.stack.imgur.com/e3JoQ.jpg</a></p>
  
  <p>How can I do that</p>