title: How to change tab bar item controller on touch?
body: <p>I am wondering if it is possible to change the tab bar item controller on touch.</p>
  
  <pre><code>- (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController
  {
     if(smth)
     {
         [tabBarController setSelectedIndex:4];
     }
  }
  </code></pre>
  
  <p>Need functionality like this, but I don't have that in <code>tabBarController</code> array of controllers.</p>
  
  <p>Basically, I want to replace controllers at some point. </p>