UIView动画

Question

我需要水平翻转视图。

当我这样做时，我尝试与导航控制器一起翻转，背景屏幕变黑

如何避免这种情况？

我尝试了这段代码。

HomeViewController *homeVC = [[HomeViewController alloc] init];
UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:homeVC];
nav.modalTransitionStyle = UIModalTransitionStyleFlipHorizontal;
nav.modalPresentationStyle = UIModalPresentationFormSheet;
[[self navigationController] presentViewController:nav animated:YES completion:^{
    [Constants showHomeScreenOnViewController:self];
}];

Answer 1

请尝试以下代码：-

UIViewController *controller = [[[MyViewController alloc] init] autorelease];
UIViewAnimationTransition trans = UIViewAnimationTransitionCurlUp;
[UIView beginAnimations: nil context: nil];
[UIView setAnimationTransition: trans forView: [self window] cache: YES];
[navController presentModalViewController: controller animated: NO];
[UIView commitAnimations];

Answer 2

您可以通过以下代码更改演示样式来避免黑屏，

用这个，

 nav.modalPresentationStyle = UIModalPresentationOverFullScreen;

要么

 nav.modalPresentationStyle = UIModalPresentationOverCurrentContext;

希望这会帮助你。