Problems dismissing and representing UIImagePickerController camera iOS8.4

Question

EDIT Problem reinstated from scratch.

I have a ViewController A which has a Navigation Bar Button which presents an

Answer 1

I believe this will work for you. Do!

 [self.presentingViewController dismissViewControllerAnimated:NO completion:^{
               [RefrenceOfPreviousViewController dismissViewControllerAnimated:YES completion:^{

               }];
           }];

Instead of

 [self.presentingViewController.presentingViewController dismissViewControllerAnimated:NO completion:nil];