title: Moving UITabBarItem Image down?
body: <p>Normally on each tab of a <code>UITabBar</code> you have a small image and a title naming the tab. The image is positioned/centred towards the top of the tab to accommodate the title underneath. My question is: <em>if you want to have a tabBar with just an image and no title is there a way to move the image down so it centers better within the tab?</em></p>
  
  <p>I am using (see below) currently:</p>
  
  <pre><code>[tabBarItem setFinishedSelectedImage:tabSelected withFinishedUnselectedImage:tabUnselected];
  </code></pre>
  
  <p>but would prefer to use to larger image with no title, at the moment if I make the image bigger than about 70pixels@2x it starts edging off the top of the <code>UITabBar</code> whilst leaving a lot of unused space at the bottom.</p>