使用故事板在动画期间更改图像

Question

我正在寻找一种在故事板中更改图像的方法,或者更具体地说,更改Source图像的属性以指向新的图像资源.似乎有一个StringAnimationUsingKeyFrames和一个DiscreteStringKeyFrame但是这不起作用(据我所知),因为Image的Source属性是类型的ImageSource

我目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Source将图像更改为故事板的一部分,还是我运气不好？

Answer 1

好的,我自己解决了.似乎你必须使用ObjectAnimationUsingKeyFrames和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>