title: iOS Present Popover from bar button item bottom
body: <p>I have an <code>UIPopoverController</code> that presents an <code>UIViewController</code> using this method:</p>
  
  <pre><code>[self.popover presentPopoverFromBarButtonItem:self.infoBarButtonItem 
                       permittedArrowDirections:UIPopoverArrowDirectionUp
                                       animated:YES];
  </code></pre>
  
  <p><code>self.popover</code> is my <code>UIPopoverController</code>.</p>
  
  <p>The code works well, but the Popover arrow is  in the middle of the <code>BarButtonItem</code> how do I display the Popover with its arrow "under" the button?</p>
  
  <p>This is what it currently looks like:<br>
  <img src="https://dl.dropbox.com/s/hxng44wzocm1wm6/ScreenShot_popover_barbuttonItem.png?dl=0" alt="altText"></p>