When build toVC using getter and setter code only like : =======
When build toVC using getter and setter code only like :
=======

//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;

andreamazz/BubbleTransition,andreamazz/BubbleTransition