Best implementation for transitionWithView in Navigation Controller when the user tap BACK - ios6

Question

I have 2 UIViewControllers inside a NavigationController.
The first one, A, has just an UISearchBar on top of a tableView, as the tableHeader.
The second one, B, has a view in the upper part of the screen (let's call it a custom TableHeader) and a table below this view.
I wanted to simulate the modal transitionFlipFromRight when pushing from UIViewController A to UIViewControllerB and to simulate the modal transitionFlipFromLeft when popping from UIViewController B to UIViewController A when the user tap the navigationItem.backBarButtonItem.
No problem for the push side:
UIViewController *vcB = [UIViewController alloc] init];
[self.navigationController pushViewController: vcB animated: NO];
[UIView transitionWithView:self.navigationController.view
duration:0.8
options:UIViewAnimationOptionTransitionFlipFromRight
animations:nil
completion:nil];
It works as expected.
I have problems implementing the pop, the switch back from UIViewController B to UIViewController A.
I added this code in the UIViewController B:
-(void) viewWillDisappear: (BOOL) animated
{
[super viewWilDisappear: NO]
[UIView transitionWithView:self.navigationController.view
duration:0.8
options:UIViewAnimationOptionTransitionFlipFromLeft
animations:nil
completion:nil];
}
I can see the flip but I am not satisfied with the result because for a fraction of a second after the switch from B to A I can still see the B custom tableHeader, moved from left border by 10 points.
Should I manage the transition from B to A in viewWillDisappear or I am totally wrong in doing this?
If I am wrong, What is the correct way to handle the pop animation?
Thanks
Nicola

Answer 1

Why dont you try this in your viewWillDisappear itself and check whether this works?
UIViewController *vcA = [UIViewController alloc] init];
[[self retain] autorelease];
[self.navigationController pushViewController: vcA animated: NO];
[UIView transitionWithView:self.navigationController.view
duration:0.8
options:UIViewAnimationOptionTransitionFlipFromLeft
animations:nil
completion:nil];
[self.navigationController popViewControllerAnimated:NO];
This is a tested code. So it works fine. This should help you.