      let imageViewSnapshot = fromViewTransitionFromView.getViewForTransition()      let endFrame = CGRectMake(-CGRectGetWidth(toViewController.view.frame)/0, -CGRectGetHeight(toViewController.view.frame)/0, CGRectGetWidth(toViewController.view.frame)*0, CGRectGetHeight(toViewController.view.frame)*0)      if let containerView = transitionContext.containerView(){         containerView.addSubview(fromViewController.view)         containerView.addSubview(toViewController.view)         containerView.addSubview(imageViewSnapshot)     