When build toVC using getter and setter code only like :

[rushairer]

//BTModalViewController is the toVC

• (ModalViewController *)BTModalViewController { if (!_BTModalViewController) { _BTModalViewController = [[ModalViewController alloc] init]; _BTModalViewController.transitioningDelegate = self; _BTModalViewController.modalPresentationStyle = UIModalPresentationCustom; } return _BTModalViewController; }

The toVC is still in the memory, so we need to reset returningControllerView.center = originalCenter;

PS: I have made the Objective-C code for BubbleTransition at: https://github.com/rushairer/BubbleTransitionForObjC

[andreamazz]

Nice find! Thanks for the PR. :+1: