我使用下一个代码。
[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
}];
过渡工作正常。我想在过渡期间设置黑色背景。我怎样才能做到这一点?请看照片: