为什么这个 WPF 应用程序中的缓动不完全在 Blend 中完成

Why isn't the easing working in this WPF app done entirely in Blend

我无法理解为什么缓动在我的应用程序中不起作用。作为测试,我在 Blend 中创建了一个非常简单的应用程序,但它在那里也不起作用。我的测试应用程序如下。 Border 的动画效果很好,但没有缓和效果。我错过了什么?

<Window x:Class="WpfApplication1.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:local="clr-namespace:WpfApplication1"
    mc:Ignorable="d"
    Title="MainWindow" Height="350" Width="525">
<Window.Resources>
    <Storyboard x:Key="Storyboard1">
        <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.X)" Storyboard.TargetName="border">
            <EasingDoubleKeyFrame KeyTime="0" Value="0">
                <EasingDoubleKeyFrame.EasingFunction>
                    <ElasticEase EasingMode="EaseInOut"/>
                </EasingDoubleKeyFrame.EasingFunction>
            </EasingDoubleKeyFrame>
            <EasingDoubleKeyFrame KeyTime="0:0:1" Value="343.43"/>
        </DoubleAnimationUsingKeyFrames>
    </Storyboard>
</Window.Resources>
<Window.Triggers>
    <EventTrigger RoutedEvent="FrameworkElement.Loaded">
        <BeginStoryboard Storyboard="{StaticResource Storyboard1}"/>
    </EventTrigger>
</Window.Triggers>
<Grid>
    <Border x:Name="border" BorderBrush="Black" BorderThickness="1" HorizontalAlignment="Left" Height="57.926" Margin="36.854,0,0,27.098" VerticalAlignment="Bottom" Width="67.683" RenderTransformOrigin="0.5,0.5">
        <Border.RenderTransform>
            <TransformGroup>
                <ScaleTransform/>
                <SkewTransform/>
                <RotateTransform/>
                <TranslateTransform/>
            </TransformGroup>
        </Border.RenderTransform>
    </Border>

</Grid>
</Window>

第一个动画的 Easing KeyTime 设置为零秒,看起来没有动画,这可能解释了为什么它看起来不起作用。通过在一秒钟内将边框从屏幕左侧拖动到右侧,第二个动画似乎正在运行。

我引用的代码片段:

    <EasingDoubleKeyFrame KeyTime="0" Value="0">