ViewControllerTransitionsPart2-6

TTPushAnimator.m

//remove this line
//[transitionContext completeTransition:finished];

//use this code instead:

//put the original stuff back in place if the user cancelled
if(transitionContext.transitionWasCancelled)
{
	[toController.view removeFromSuperview];
	[container addSubview:fromController.view];
}
		
[transitionContext completeTransition:!transitionContext.transitionWasCancelled];