难以让DoubleAnimationUsingKeyFrames工作

我试图将这个故事板xaml标记转换为vb代码。但是，当我运行代码没有任何反应时，没有异常引发或错误没有任何东西。有什么我失踪？难以让DoubleAnimationUsingKeyFrames工作

从xaml运行时，故事板按预期工作，但是在我的代码隐藏翻译过程中出现了问题。

最后，我可以验证连接到故事板的目标元素确实存在。

XMAL

<Storyboard x:Name="FlipAnimation"> 
     <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Projection).(PlaneProjection.RotationY)" Storyboard.TargetName="Front"> 
      <EasingDoubleKeyFrame KeyTime="0" Value="0"/> 
      <EasingDoubleKeyFrame KeyTime="0:0:0.2" Value="90"/> 
     </DoubleAnimationUsingKeyFrames> 
     <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Projection).(PlaneProjection.RotationY)" Storyboard.TargetName="Back"> 
      <EasingDoubleKeyFrame KeyTime="0" Value="-90"/> 
      <EasingDoubleKeyFrame KeyTime="0:0:0.2" Value="-90"/> 
      <EasingDoubleKeyFrame KeyTime="0:0:0.4" Value="0"/> 
     </DoubleAnimationUsingKeyFrames> 
    </Storyboard>

后面的代码

Dim firstKf As DoubleAnimationUsingKeyFrames = New DoubleAnimationUsingKeyFrames 
    firstKf.KeyFrames.Add(New EasingDoubleKeyFrame With {.KeyTime = TimeSpan.Zero, .Value = "0"}) 
    firstKf.KeyFrames.Add(New EasingDoubleKeyFrame With {.KeyTime = TimeSpan.FromMilliseconds(200), .Value = "90"}) 
    Media.Animation.Storyboard.SetTargetProperty(firstKf, New PropertyPath(PlaneProjection.RotationYProperty)) 
    Media.Animation.Storyboard.SetTarget(firstKf, front) 

    Dim secondKf As DoubleAnimationUsingKeyFrames = New DoubleAnimationUsingKeyFrames 
    secondKf.KeyFrames.Add(New EasingDoubleKeyFrame With {.KeyTime = TimeSpan.Zero, .Value = "-90"}) 
    secondKf.KeyFrames.Add(New EasingDoubleKeyFrame With {.KeyTime = TimeSpan.FromMilliseconds(200), .Value = "-90"}) 
    secondKf.KeyFrames.Add(New EasingDoubleKeyFrame With {.KeyTime = TimeSpan.FromMilliseconds(400), .Value = "0"}) 
    Media.Animation.Storyboard.SetTargetProperty(secondKf, New PropertyPath(PlaneProjection.RotationYProperty)) 
    Media.Animation.Storyboard.SetTarget(secondKf, back) 

    Dim sb = New Media.Animation.Storyboard 
    sb.Children.Add(firstKf) 
    sb.Children.Add(secondKf) 
    sb.Begin()

来源

2015-01-15 nosaj_j

尝试将'duration'设置为'firstKf' – safi 2015-01-15 21:23:47

它看起来要绑定两个动画不正确的属性路径。你想

New PropertyPath("Projection.RotationY")

也许

New PropertyPath("(UIElement.Projection).(PlaneProjection.RotationY)")

因为 front

和back不直接包含PlaneProjection.RotationYProperty。

来源

2015-01-15 21:43:59 NextInLine

伟大的底部建议已排序问题。谢谢！！！ – 2015-01-15 23:47:48

难以让DoubleAnimationUsingKeyFrames工作

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