wpf - 使用情节提要在动画期间更改图像

Question

我正在寻找一种在情节提要期间更改图像的方法，或者更具体地说，更改图像的Source属性以指向新的图像资源。似乎有 aStringAnimationUsingKeyFrames和 aDiscreteStringKeyFrame但这不起作用（据我所知），因为 Image 的 Source 属性是类型ImageSource

我当前的故事板看起来像这样

<Storyboard x:Key="TransitionImage">
    <DoubleAnimationUsingKeyFrames
        BeginTime="00:00:00" 
        Storyboard.TargetName="image" 
        Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleX)">
        <SplineDoubleKeyFrame KeyTime="00:00:00.7000000" Value="0.2"/>
        <SplineDoubleKeyFrame KeyTime="00:00:01.5000000" Value="1"/>
    </DoubleAnimationUsingKeyFrames>
    <StringAnimationUsingKeyFrames
        BeginTime="00:00:00"
        Storyboard.TargetName="image"
        Storyboard.TargetProperty="(Image.Source)">
        <!-- This does not work -->
        <DiscreteStringKeyFrame KeyTime="00:00:00.7000000" Value="check_24.png"/>
    </StringAnimationUsingKeyFrames>
    <DoubleAnimationUsingKeyFrames 
        BeginTime="00:00:00" 
        Storyboard.TargetName="image"
        Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleY)">
        <SplineDoubleKeyFrame KeyTime="00:00:00.7000000" Value="0.2"/>
        <SplineDoubleKeyFrame KeyTime="00:00:01.5000000" Value="1"/>
    </DoubleAnimationUsingKeyFrames>
</Storyboard>

和图像

<Image x:Name="image" 
       Source="delete_24.png"
       Width="32" Height="32"
       Margin="8"
       RenderTransformOrigin="0.5,0.5">
    <Image.RenderTransform>
        <TransformGroup>
            <ScaleTransform/>
            <SkewTransform/>
            <RotateTransform/>
            <TranslateTransform/>
        </TransformGroup>
    </Image.RenderTransform>
</Image>

我可以更改Source图像作为故事板的一部分还是我不走运？

Answer 1

好的，自己解决了。似乎您必须使用ObjectAnimationUsingKeyFramesand DiscreteObjectKeyFrame，如下所示：

<ObjectAnimationUsingKeyFrames 
    BeginTime="00:00:00" 
    Storyboard.TargetName="image"
    Storyboard.TargetProperty="(Image.Source)">
    <DiscreteObjectKeyFrame KeyTime="00:00:00.7000000">
        <DiscreteObjectKeyFrame.Value>
            <BitmapImage UriSource="check_24.png" />
        </DiscreteObjectKeyFrame.Value>
    </DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>