Question

我目前正在尝试在两个视图控制器之间进行交互式转换。这是一个被解雇的互动动画。我使用UIPercentDrivenInteractiveTransition的子类，并在另一个对象动画师中执行以下动画。

我没有成功进行内插transform视图的toVC属性的交互。

- (void) animateTransition:(id<UIViewControllerContextTransitioning>)transitionContext
{
    NSLog(@"Animate!!");
    //Basic container
    UIViewController *fromVC = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];
    UIViewController *toVC = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];

    fromVC.view.frame = [transitionContext initialFrameForViewController:fromVC];
    toVC.view.frame = [transitionContext finalFrameForViewController:fromVC];

     toVC.view.transform = CGAffineTransformMakeScale(0.9, 0.9);

    //[transitionContext.containerView insertSubview:toVC.view belowSubview:fromVC.view];

    NSTimeInterval duration = [self transitionDuration:transitionContext];

    [UIView animateWithDuration:duration animations:^{
        [fromVC beginAppearanceTransition:NO animated:YES];

        fromVC.view.frame = CGRectMake(0, CGRectGetHeight(fromVC.view.frame), CGRectGetWidth(fromVC.view.frame), CGRectGetHeight(fromVC.view.frame));

        toVC.view.transform = CGAffineTransformIdentity;
        [toVC beginAppearanceTransition:YES animated:YES];
    } completion:^(BOOL finished){

        [transitionContext completeTransition:![transitionContext transitionWasCancelled]];
        if(finished)
        {
            [fromVC endAppearanceTransition];
            [toVC endAppearanceTransition];

        }        
    }];

}

我想让toVC以刻度开始并完成以适应屏幕，同时fromVC从上到下滑动。

滑动是正确插值的，但转换只是完成但不进行插值。

错误在哪里

Answer 1

我也遇到了这个问题。对我来说，解决方案是转换toVC.view而不是toVC.view的快照。我不确定为什么这是必要的。

您可以使用snapshotViewAfterScreenUpdates:拍摄快照。您还需要将toVC.view的变换设置为CGAffineTransformIdentity并在动画开始之前隐藏它。然后，在完成块中取消隐藏它。

UIPercentDrivenInteractiveTransition不插入transform属性

1 个答案: