objective c - ModalViewController Without Dimming / Disabling current viewcontroller -

I am displaying a NVController as a modalViewController in a specific frame CGRectMake (4050, 400, 500)

Here is my code to present a visual controller. I thought, I am missing something here, please help. thank you in advanced. aNavController.modalPresentationStyle = UIModalPresentationFormSheet; AnavController.modalTransitionStyle = UIModalTransitionStyleCoverVertical; [Self-Present Model View Controller: ANAV Animated Animator: Yes]; ANavController.view.superview.frame = CGRectMake (40, 50, 400, 500);

The current model view controller creates a modal dialog. When the Model View Controller goes up, parents can not do anything when they see the parent until the original view is dismissed.