title: Objective-c NavigationBar color change?
body: <p>Can someone tell me how I can set the colour of a navigation bar in a view controller? </p>
  
  <p>I used this:</p>
  
  <pre><code>UINavigationBar *navigationBar = self.navigationController.navigationBar;
  
  [navigationBar setBackgroundColor:[UIColor redColor]];
  
  self.navigationController.navigationBar.tintColor = [UIColor redColor];
  </code></pre>
  
  <p>Can someone can tell me what is <code>tintColor</code> and how it differs from the <code>backgroundColor</code>?</p>