使用故事板在动画期间更改图像 [英] Change an image during animation using storyboard

问题描述

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，将图像的 Source 属性更改为指向到新的图像资源。似乎有一个 StringAnimationUsingKeyFrames 和一个 DiscreteStringKeyFrame 但这不起作用（据我所知），因为Image的Source属性类型为 ImageSource

I was looking for a way to change an Image during a storyboard, or more specifically, change the Source property of the image to point to a new image resource. There seems to be a StringAnimationUsingKeyFrames and a DiscreteStringKeyFrame but this does not work (as far as I can tell) since the Source property of the Image is of type ImageSource

我当前的故事板看起来像这样

My current storyboard looks like this

<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>

和图片

<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>

我可以更改图片的来源作为故事板的一部分还是我运气不好？

Can I change the Source of the image as part of the storyboard or am I out of luck?

推荐答案

好的，我自己解决了。似乎你必须使用 ObjectAnimationUsingKeyFrames 和 DiscreteObjectKeyFrame ，如下所示：

Okay, solved it myself. Seems you have to use the ObjectAnimationUsingKeyFrames and DiscreteObjectKeyFrame as shown below:

<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>

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