UIView transitionFromView: how can I do black background during transition?

问题

I use next code.

[UIView transitionFromView:viewA toView:viewB duration:1.0 options: UIViewAnimationOptionTransitionFlipFromLeft
                        completion: ^(BOOL inFinished) {
                            viewB.hidden = NO;
                            viewA.hidden = YES;
                            //do any post animation actions here
                        }];

Transition works OK. I want to set a black background during transition. How can I do this? Please, see the photo:

回答1:

Try with setting the black background color for parent view of animated view.

viewB.superview.backgroundColor = [UIColor blackColor];

来源：https://stackoverflow.com/questions/6493478/uiview-transitionfromview-how-can-i-do-black-background-during-transition