wpf - 移除带有动画的 ObservableCollection 项目

Question

可能重复：
如何实现添加/删除列表项的淡入和淡出

LayoutStates当我删除我的项目时，我尝试FrameworkElement.Unloaded制作动画，但它不起作用。

我认为该项目在执行动画之前已被删除！

有谁知道解决方案？

<EventTrigger RoutedEvent="FrameworkElement.Unloaded">
    <BeginStoryboard>
        <Storyboard>
            <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleX)" Storyboard.TargetName="grid">
                <EasingDoubleKeyFrame KeyTime="0:0:0.4" Value="0.6"/>
                <EasingDoubleKeyFrame KeyTime="0:0:0.6" Value="1.6"/>
                <EasingDoubleKeyFrame KeyTime="0:0:0.7" Value="0"/>
            </DoubleAnimationUsingKeyFrames>
            <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleY)" Storyboard.TargetName="grid">
                <EasingDoubleKeyFrame KeyTime="0:0:0.4" Value="0.6"/>
                <EasingDoubleKeyFrame KeyTime="0:0:0.6" Value="1.6"/>
                <EasingDoubleKeyFrame KeyTime="0:0:0.7" Value="0"/>
            </DoubleAnimationUsingKeyFrames>
        </Storyboard>
    </BeginStoryboard>
</EventTrigger>