使用 UIViewControllerAnimatedTransitioning 时，toView 按钮无法与之交互

Question

我的自定义 UIViewControllerAnimatedTransitioning 类遇到了这个问题。当动画完成并呈现 toView 时，其中的元素（按钮等）无法接收交互。

自定义类代码是这样的：

- (NSTimeInterval)transitionDuration:(id<UIViewControllerContextTransitioning>)transitionContext
{
    return 1.0;
}

- (void)animateTransition:(id<UIViewControllerContextTransitioning>)transitionContext;
{
    UIViewController *fromViewController = (UIViewController *)[transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];
    UIViewController *toViewController = (UIViewController *)[transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];
    CGRect finalFrameForVC = [transitionContext finalFrameForViewController:toViewController];
    UIView *containerView = [transitionContext containerView];
    CGRect bounds = [[UIScreen mainScreen] bounds];
    toViewController.view.frame = CGRectMake(0, 0, bounds.size.width, 0);
    [containerView addSubview:toViewController.view];

    [UIView animateWithDuration:[self transitionDuration:transitionContext] delay:0.0 usingSpringWithDamping:1.0 initialSpringVelocity:0.0 options:UIViewAnimationOptionCurveLinear animations:^{
        fromViewController.view.alpha = 0.5;
        toViewController.view.frame = CGRectMake(0, 0, finalFrameForVC.size.width, finalFrameForVC.size.height);
    } completion:^(BOOL finished) {
        fromViewController.view.alpha = 0.0;
    }];
}

从视图来看，转换是这样调用的：

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    if ([segue.identifier isEqualToString:@"showAction"]) {
        FiltersViewController *filterView = (FiltersViewController *)segue.destinationViewController;
        filterView.transitioningDelegate = self;
    }
}

-(id<UIViewControllerAnimatedTransitioning>)animationControllerForPresentedController:(UIViewController *)presented presentingController:(UIViewController *)presenting sourceController:(UIViewController *)source {
    self.filtersPresentAnimationController = [[FiltersPresentAnimationController alloc] init];
    return self.filtersPresentAnimationController;
}

知道我做错了什么吗？当我从 segue 中删除 segue 标识符时，它工作得很好。

Answer 1

我只是忘了告诉transitionContext 转换完成了。

所以在完成的动画块中缺少这个

[transitionContext completeTransition:YES];