进入和退出的动画控制：
<Storyboard x:Key="ShowSb" Completed="Storyboard_Completed">
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.Y)" Storyboard.TargetName="grid1">
<EasingDoubleKeyFrame KeyTime="0" Value="{Binding YOffSet}"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="0"/>
<EasingDoubleKeyFrame KeyTime="0:0:3" Value="0"/>
<EasingDoubleKeyFrame KeyTime="0:0:3.5" Value="{Binding YOffSet}"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.Y)" Storyboard.TargetName="grid2">
<EasingDoubleKeyFrame KeyTime="0" Value="{Binding YOffSet}"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="0"/>
<EasingDoubleKeyFrame KeyTime="0:0:3" Value="0"/>
<EasingDoubleKeyFrame KeyTime="0:0:3.5" Value="{Binding YOffSet}"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.Y)" Storyboard.TargetName="tb">
<EasingDoubleKeyFrame KeyTime="0" Value="{Binding YOffSet}"/>
<EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="0"/>
<EasingDoubleKeyFrame KeyTime="0:0:3" Value="0"/>
<EasingDoubleKeyFrame KeyTime="0:0:3.5" Value="{Binding YOffSet}"/>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
<Storyboard x:Key="MouseLeave" Completed="Storyboard_Completed">
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Opacity)" Storyboard.TargetName="grid1">
<EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="0"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Opacity)" Storyboard.TargetName="grid2">
<EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="0"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Opacity)" Storyboard.TargetName="tb">
<EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="0"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.Y)" Storyboard.TargetName="grid1">
<EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="{Binding YOffSet}"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.Y)" Storyboard.TargetName="grid2">
<EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="{Binding YOffSet}"/>
</DoubleAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.Y)" Storyboard.TargetName="tb">
<EasingDoubleKeyFrame KeyTime="0:0:0.5" Value="{Binding YOffSet}"/>
</DoubleAnimationUsingKeyFrames>
</Storyboard>
