DataTemplate中图像的Xamarin.Forms闪烁动画

using Xamarin.Forms;

public class BlinkAnimation
{
    public static void Start(View view, uint duration)
    {
        view.Animate("BlinkAnimation", new Animation((d) =>
        {
            view.Opacity = d;
        }), 0, 1, Easing.Linear, repeat: () => true, length: duration);
    }
}

<DataTemplate x:Key="BlinkTemplate">
    <Image Source="{Binding ImageSource}" WidthRequest="100" HeightRequest="100">
        <Image.Triggers>
            <Trigger TargetType="Image" Property="IsVisible" Value="True">
                <Trigger.EnterActions>
                    <BeginStoryboard>
                        <Storyboard>
                            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="Opacity">
                                <DiscreteObjectKeyFrame KeyTime="0" Value="1" />
                                <DiscreteObjectKeyFrame KeyTime="0:0:0.5" Value="0" />
                            </ObjectAnimationUsingKeyFrames>
                        </Storyboard>
                    </BeginStoryboard>
                </Trigger.EnterActions>
            </Trigger>
        </Image.Triggers>
    </Image>
</DataTemplate>