title: Flip animation of tableview with its own TableViewController within main ViewController
body: <p>Relatively basic issue, but I spent whole day figuring out without any success. I have ViewController with main fullscreen View and separate TableViewController with TableView which does not cover the entire screen. I need to use UIRefreshControl on the TableView, hence the separate TVC.</p>
  
  <p>I want to achieve that on cell selection existing TableView will flip around to be replaced with another TableView (like a step 2 of user selection). I expect that the existing main View will be visible during the TableViews transition.</p>
  
  <p>I was able to achieve the full View flip transiton into different view using the begin animation/commit animation method, but never the childview only, nor using the new animation block method. Can you please suggest the animation code and how should I introduce the second tableview (under the existing TVC or under it's own TVC)?</p>
  
  <pre><code>@implementation ViewController
  TableViewController *tableVC;
  - (void)viewDidLoad
  {
      [super viewDidLoad];
      tableVC = [self.storyboard instantiateViewControllerWithIdentifier:@"TableVC"];
      [self addChildViewController:tableVC];
      tableVC.view.frame = CGRectMake(8, 177, 304, 371);
      [self.view addSubview:tableVC.view];
  }
  </code></pre>
  
  <p>Many thanks.</p>