title: Open SecondViewController on startup insted FirstViewController
body: <p>I have TabBarController with two navigations controllers as on an attached image.
  If my app will be run first time should be opened Second View Controller.</p>
  
  <p>For navigation controllers I use below code:</p>
  
  <pre><code>UIStoryboard *sb = [UIStoryboard storyboardWithName:@"Main_iPhone" bundle:nil];
  
      cysViewController *cvc =[sb instantiateViewControllerWithIdentifier:@"cysViewController"];
      questionViewController *qvc = [sb instantiateViewControllerWithIdentifier:@"questionViewController"];
      UINavigationController *nav = (UINavigationController *) self.window.rootViewController;
      nav.viewControllers = [NSArray arrayWithObjects:cvc,qvc, nil];
      [(UINavigationController *)self.window.rootViewController popToViewController:qvc animated:NO];
  </code></pre>
  
  <p>but for tabBarController I have no idea how to do that.</p>
  
  <p><img src="https://i.stack.imgur.com/TeWBV.png" alt="my controllers"></p>