title: Hide Back text in navigation item
body: <p>I need to set a back arrow by replacing back Text(button)in navigation bar. I can view the back arrow but i don't know how to hide the back Text in navigation item.  Here's is my code:</p>
  
  <p>with this am getting warning : : CGImageCreateWithImageProvider: invalid image size: 0 x 0.</p>
  
  <pre><code>(void)viewWillAppear:(BOOL)animated
   {
      UIImage *backButtonHomeImage = [[UIImage imageNamed:@"back-arrow.png"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 0, 104, 13)];
      [[UIBarButtonItem appearance] setBackButtonBackgroundImage:backButtonHomeImage  forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];
  
      self.navigationItem.leftBarButtonItem = nil;
  }
  </code></pre>