如何在xamarin.forms中使集合视图内的元素具有动画效果？

<DataTemplate x:Key="ItemTemplate">
    <Grid>
        <Label Text="{Binding Name}" />
    </Grid>
</DataTemplate>

using Xamarin.Forms;

public class MyCollectionView : ContentPage
{
    public MyCollectionView()
    {
        var collectionView = new CollectionView
        {
            ItemTemplate = (DataTemplate)Resources["ItemTemplate"],
            ItemsSource = YourDataSource
        };

        collectionView.ItemAppearing += (sender, e) =>
        {
            var visualElement = e.Item as VisualElement;
            visualElement.FadeTo(1, 1000); // 淡入动画效果
        };

        collectionView.ItemDisappearing += (sender, e) =>
        {
            var visualElement = e.Item as VisualElement;
            visualElement.FadeTo(0, 1000); // 淡出动画效果
        };

        Content = collectionView;
    }
}