UIPresentationController - 与Interactive Transition一起制作动画？

Question

我创建了一个UIPresentationController,它为tintAdjustmentViewPresentationController 添加了一个简单的方法containerView:

- (void)presentationTransitionWillBegin {

UIView* containerView = [self containerView];
[containerView insertSubview:self.tintAdjustmentView atIndex:0];
self.tintAdjustmentView.frame = containerView.bounds;
self.tintAdjustmentView.alpha = 0.f;

id<UIViewControllerTransitionCoordinator> coordinator = [[self presentedViewController] transitionCoordinator];
if (coordinator) {
    [coordinator animateAlongsideTransition:^(id<UIViewControllerTransitionCoordinatorContext>context) {
        [self.tintAdjustmentView setAlpha:1.0];
    } completion:nil];
} else {
    [self.tintAdjustmentView setAlpha:1.0];
}
}

当我使用基本<UIViewControllerAnimatedTransitioning>对象时,它可以根据需要工作 - 调整视图在动画时更新alpha.

现在,我也开始使用自定义<UIViewControllerInteractiveTransitioning>对象来支持交互式转换.请注意,这不是一个UIPercentDrivenInteractionTransition对象.

不幸的是,tintAdjustmentView当我使用交互式转换时,它没有动画.如何为视图设置动画以及交互式过渡？