Question

我正在使用最新的iOS 7动画转换协议，以便创建一个视频控制器的淡入淡出过渡;班级成员PSSpaceDetailViewController。但是，对于所有其他推送转换，我想使用UINavigationController通常提供的默认推送动画。

然而，实现了以下代码才能做到这一点，当我从上述类中推出一个单独的视图控制器时，我收到一个奇怪的延迟震动动画。任何想法为什么会这样？我上传了一段简短的视频，展示了我想要描述的动画，希望能更容易理解这个错误：http://d.pr/v/Q754

//PSAnimatngNavigationControllerDelegate.m

+ (instancetype) sharedInstance {
    static PSAnimatingNavigationControllerDelegate *shared;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        shared = [[PSAnimatingNavigationControllerDelegate alloc] init];
    });
    return shared;
}

- (PSFadeAnimator *) animator {
    if (!_animator) {
        _animator = [[PSFadeAnimator alloc] init];
    }
    return _animator;
}

- (id<UIViewControllerAnimatedTransitioning>)navigationController:(UINavigationController *)navigationController animationControllerForOperation:(UINavigationControllerOperation)operation fromViewController:(UIViewController *)fromVC toViewController:(UIViewController *)toVC
{
    if (operation == UINavigationControllerOperationPush && [toVC isKindOfClass:[PSSpaceDetailViewController class]]) {
        return self.animator;
    }
    return nil;
}

// App Delegate.m

UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:notesViewController];
[navigationController setDelegate:[PSAnimatingNavigationControllerDelegate sharedInstance]];

PSSpaceDetailViewController.m

- (void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    PSMatchDetailViewController *matchDetail = [[PSMatchDetailViewController alloc] initWithOriginalSpace:self.space andPotentialLead:self.datasource[indexPath.section][indexPath.row]];
    [self.navigationController pushViewController:matchDetail animated:YES];
}

Answer 1

您正在推送的视图控制器具有nil背景颜色，默认情况下在iOS 7上清除。只需将其设置为白色或其他任何颜色即可。

UINavigationController震动推送过渡

1 个答案: