難以讓DoubleAnimationUsingKeyFrames工作

我試圖將這個故事板xaml標記轉換爲vb代碼。但是，當我運行代碼沒有任何反應時，沒有異常引發或錯誤沒有任何東西。有什麼我失蹤？難以讓DoubleAnimationUsingKeyFrames工作

從xaml運行時，故事板按預期工作，但是在我的代碼隱藏翻譯過程中出現了問題。

最後，我可以驗證連接到故事板的目標元素確實存在。

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>

後面的代碼

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()

來源

2015-01-15 nosaj_j

嘗試將'duration'設置爲'firstKf' – safi 2015-01-15 21:23:47

它看起來要綁定兩個動畫不正確的屬性路徑。你想

New PropertyPath("Projection.RotationY")

也許

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

因爲 front

和back不直接包含PlaneProjection.RotationYProperty。

來源

2015-01-15 21:43:59 NextInLine

偉大的底部建議已排序問題。謝謝！！！ – 2015-01-15 23:47:48

難以讓DoubleAnimationUsingKeyFrames工作

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