title: Remove UITabbar upper border line
body: <p>I have been using UITabbar in an app.
  There is an upper border line coming in top of the UITabbar.
  Refer below image :-</p>
  
  <p>I Googled it and tried the suggested code like :-</p>
  
  <pre><code>[[UITabBar appearance] setShadowImage:[[UIImage alloc] init]];
  </code></pre>
  
  <p>Also</p>
  
  <pre><code>[[UITabBar appearance] setShadowImage:nil];
  
  self.navigationController.toolbar.clipsToBounds = YES;
  </code></pre>
  
  <p>But none of them is working. Any solution?</p>
  
  <p><a href="https://i.stack.imgur.com/NToqJ.png" rel="noreferrer"><img src="https://i.stack.imgur.com/NToqJ.png" alt="enter image description here"></a></p>