c# - PointerDownThemeAnimation 应用程序停止 WP8

Question

我很困惑为什么我的应用程序会关闭，我添加了 PointerDownThemeAnimation 并且它工作正常但只有一次，当我再次尝试单击它时应用程序停止了。为什么？
这是我的代码:

private void staryrynek1(object sender, PointerRoutedEventArgs e)
{
    pointerDownStoryboard.Begin();
}

private void staryrynek(object sender, PointerRoutedEventArgs e)
{
    pointerUpStoryboard.Begin();
    this.Frame.Navigate(typeof(StaryRynek));
}

和

<Grid x:Name="staryrynek_grid" Margin="10,92,10,0" VerticalAlignment="Top" PointerPressed="staryrynek1" PointerReleased="staryrynek">
        <Grid.Resources>
            <Storyboard x:Name="pointerDownStoryboard">
                <PointerDownThemeAnimation TargetName="staryrynek_grid" />
            </Storyboard>
            <Storyboard x:Name="pointerUpStoryboard">
                <PointerUpThemeAnimation TargetName="staryrynek_grid" />
            </Storyboard>
        </Grid.Resources>
        <Grid.Background>
            <SolidColorBrush Color="Black" Opacity="0.495"/>
        </Grid.Background>
        <TextBlock HorizontalAlignment="Center" TextWrapping="Wrap" VerticalAlignment="Top" Width="380" FontSize="29.333" Text="Stary Rynek"/>
    </Grid>

Answer 1

我认为您发现了一个真正的错误。这是解决方法。

XAML

<Grid>
    <Grid.Resources>
        <Storyboard x:Name="PointerDownStory">
            <PointerDownThemeAnimation TargetName="MyRectangle" />
        </Storyboard>
        <Storyboard x:Name="PointerUpStory">
            <PointerUpThemeAnimation TargetName="MyRectangle" />
        </Storyboard>
        <Style TargetType="Rectangle">
            <Setter Property="Width" Value="300" />
            <Setter Property="Height" Value="200" />
            <Setter Property="Fill" Value="White" />
        </Style>
    </Grid.Resources>
    <Rectangle x:Name="MyRectangle"
               PointerPressed="Grid_PointerPressed"
               PointerReleased="Grid_PointerReleased" />
</Grid>

代码隐藏

private void Grid_PointerPressed(object sender, PointerRoutedEventArgs e)
{
    this.MyRectangle.Projection = new PlaneProjection();
    PointerDownStory.Begin();
}

private void Grid_PointerReleased(object sender, PointerRoutedEventArgs e)
{
    PointerUpStory.Begin();
}

这是您应该注意的 this.MyRectangle.Projection = new PlaneProjection(); 行。这是您原始代码的唯一真正变化。似乎 PointerUpThemeAnimation 无意中破坏了 PlaneProjection。如果 PointerDownThemeAnimation 会重新创建它，那就没问题了。

祝你好运!