title: How to make UITabBarItem be an image from unicode?
body: <p>I can create an image with a "png" file.</p>
  
  <pre><code>UITabBarItem *tabBarItem1 = [[UITabBarItem alloc] initWithTitle:@"Operation" 
                                image:[UIImage imageNamed:@"plus.png"] tag:0 ];
  </code></pre>
  
  <p>But I would like to use unicode image (721) or character val, ie:</p>
  
  <pre><code>UITabBarItem *tabBarItem1 = [[UITabBarItem alloc] initWithTitle:@"Operation"
                                image: {unicode: 721 }];
  </code></pre>
  
  <p>How would I do this?  thx</p>