我为我正在制作的一些游戏制作了一个骰子(在 C# 中),它是一个用户控件,它使用故事板来依次显示多个图像(如幻灯片),因此它看起来像一个滚动的 3D 骰子。问题在于在特定关键帧处启动和停止它。为此使用 Pause() 和 Resume() 似乎是合乎逻辑的,但我不知道如何在确切的关键帧处暂停。
有些人使用单独的调度程序计时器来执行此操作,但这不够精确,无法将其停止在确切的关键帧处。 (例如,如果您抛出 4,它必须停在 4 图像上)。
所以,如果有这样的方法那就太好了:
TimeSpan keyTime = new TimeSpan(0,0,0,0,750); // 750 miliseconds
myStoryBoard.ResumeTo(keyTime); // <- doesn't exist as far as I know
以下是 XAML 故事板中的一个片段:
<Storyboard x:Key="DieStoryBoard" RepeatBehavior="Forever">
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)" Storyboard.TargetName="image1">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<Visibility>Visible</Visibility>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
<DiscreteObjectKeyFrame KeyTime="0:0:0.05">
<DiscreteObjectKeyFrame.Value>
<Visibility>Collapsed</Visibility>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)" Storyboard.TargetName="image2">
<DiscreteObjectKeyFrame KeyTime="0:0:0.05">
<DiscreteObjectKeyFrame.Value>
<Visibility>Visible</Visibility>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
<DiscreteObjectKeyFrame KeyTime="0:0:0.10">
<DiscreteObjectKeyFrame.Value>
<Visibility>Collapsed</Visibility>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)" Storyboard.TargetName="image3">
<DiscreteObjectKeyFrame KeyTime="0:0:0.10">
<DiscreteObjectKeyFrame.Value>
<Visibility>Visible</Visibility>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
<DiscreteObjectKeyFrame KeyTime="0:0:0.15">
<DiscreteObjectKeyFrame.Value>
<Visibility>Collapsed</Visibility>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
.....
还有一些图片可以让事情变得更清楚:
尝试这个...
我的例子是一个旋转的箭头,我可以将它停在指定的角度。
<Window.Resources>
<Storyboard x:Key="Storyboard1">
<DoubleAnimationUsingKeyFrames
Storyboard.TargetProperty="(UIElement.RenderTransform).
(TransformGroup.Children)[2].(RotateTransform.Angle)"
Storyboard.TargetName="RightPanelButton1">
<DiscreteDoubleKeyFrame KeyTime="0:0:0" Value="0.0"/>
<DiscreteDoubleKeyFrame KeyTime="0:0:1" Value="45.0"/>
<DiscreteDoubleKeyFrame KeyTime="0:0:2" Value="90.0"/>
<DiscreteDoubleKeyFrame KeyTime="0:0:3" Value="135.0"/>
<DiscreteDoubleKeyFrame KeyTime="0:0:4" Value="180.0"/>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
</Window.Resources>
Storyboard st = ((Storyboard)this.Resources["Storyboard1"]);
st.Begin();
st.Seek(new TimeSpan(0,0,2));
st.Pause();
Abbas Ahmed
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