为什么我长按列表导致应用程序崩溃uwp？

Question

我正在将我的应用程序迁移到UWP，我发现了一个问题。那是当我长按或在列表视图中按住某个项目时，应用程序将崩溃并退出。我已经尝试自己处理Holding事件。但它不起作用。执行我注册的OnHolding事件并在其中不执行任何操作后，它只是退出而没有任何跟踪（我不能使用F10一步一步地调试它，它只是退出而没有任何信息）。任何的想法？这只发生在Win10手机中。

 private void OnHolding(object sender, HoldingRoutedEventArgs e)
 {
     e.Handled = true;
 }

ShowLayout.Execute（）

的代码

    public object Execute(object sender, object parameter)
    {
        FrameworkElement senderElement = sender as FrameworkElement;
        FlyoutBase flyoutBase = FlyoutBase.GetAttachedFlyout(senderElement);

        flyoutBase.ShowAt(senderElement);

        return null;
    }

这是关于Flyout项目的xaml代码

<FlyoutBase.AttachedFlyout>
        <MenuFlyout
            Closed="OnFlyoutClosed"
            Opening="OnFlyoutOpening">

            <MenuFlyout.MenuFlyoutPresenterStyle>
                <Style
                    TargetType="MenuFlyoutPresenter">
                    <Setter Property="RequestedTheme" Value="Light"/>
                    <Setter Property="Template">
                        <Setter.Value>
                            <ControlTemplate TargetType="MenuFlyoutPresenter">
                                <Border x:Name="OuterBorder" FlowDirection="LeftToRight" BorderBrush="Transparent">
                                    <VisualStateManager.VisualStateGroups>
                                        <VisualStateGroup x:Name="PlacementStates">
                                            <VisualState x:Name="None" />
                                            <VisualState x:Name="TopPortrait">
                                                <Storyboard>
                                                    <PointAnimation Storyboard.TargetName="InnerBorder" Storyboard.TargetProperty="RenderTransformOrigin" Duration="0:0:0" To="0,1" />
                                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="OuterBorder" Storyboard.TargetProperty="BorderThickness">
                                                        <DiscreteObjectKeyFrame KeyTime="0" Value="0,0,0,1.5" />
                                                        <DiscreteObjectKeyFrame KeyTime="0:0:0.50" Value="{ThemeResource MenuFlyoutPortraitBorderThemeThickness}" />
                                                    </ObjectAnimationUsingKeyFrames>
                                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="CenterBorder" Storyboard.TargetProperty="BorderThickness">
                                                        <DiscreteObjectKeyFrame KeyTime="0" Value="0,0,0,1.5" />
                                                        <DiscreteObjectKeyFrame KeyTime="0:0:0.50" Value="{ThemeResource MenuFlyoutPortraitBorderThemeThickness}" />
                                                    </ObjectAnimationUsingKeyFrames>
                                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ItemsPresenter" Storyboard.TargetProperty="Margin">
                                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource MenuFlyoutPortraitThemePadding}" />
                                                    </ObjectAnimationUsingKeyFrames>
                                                    <DoubleAnimation Storyboard.TargetName="OuterScaleTransform" Storyboard.TargetProperty="ScaleX" Duration="0:0:0.38" From="0.0" To="1.0" />
                                                    <DoubleAnimationUsingKeyFrames Storyboard.TargetName="InnerScaleTransform" Storyboard.TargetProperty="ScaleY">
                                                        <LinearDoubleKeyFrame KeyTime="0:0:0" Value="0.0" />
                                                        <LinearDoubleKeyFrame KeyTime="0:0:0.38" Value="0.0" />
                                                        <LinearDoubleKeyFrame KeyTime="0:0:0.50" Value="1.0" />
                                                    </DoubleAnimationUsingKeyFrames>
                                                </Storyboard>
                                            </VisualState>
                                            <VisualState x:Name="BottomPortrait">
                                                <Storyboard>
                                                    <PointAnimation Storyboard.TargetName="InnerBorder" Storyboard.TargetProperty="RenderTransformOrigin" Duration="0:0:0" To="0,1" />
                                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="OuterBorder" Storyboard.TargetProperty="BorderThickness">
                                                        <DiscreteObjectKeyFrame KeyTime="0" Value="0,0,0,1.5" />
                                                        <DiscreteObjectKeyFrame KeyTime="0:0:0.50" Value="{ThemeResource MenuFlyoutPortraitBorderThemeThickness}" />
                                                    </ObjectAnimationUsingKeyFrames>
                                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="CenterBorder" Storyboard.TargetProperty="BorderThickness">
                                                        <DiscreteObjectKeyFrame KeyTime="0" Value="0,0,0,1.5" />
                                                        <DiscreteObjectKeyFrame KeyTime="0:0:0.50" Value="{ThemeResource MenuFlyoutPortraitBorderThemeThickness}" />
                                                    </ObjectAnimationUsingKeyFrames>
                                                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="ItemsPresenter" Storyboard.TargetProperty="Margin">
                                                        <DiscreteObjectKeyFrame KeyTime="0" Value="{ThemeResource MenuFlyoutPortraitThemePadding}" />
                                                    </ObjectAnimationUsingKeyFrames>
                                                    <DoubleAnimation Storyboard.TargetName="OuterScaleTransform" Storyboard.TargetProperty="ScaleX" Duration="0:0:0.38" From="0.0" To="1.0" />
                                                    <DoubleAnimationUsingKeyFrames Storyboard.TargetName="InnerScaleTransform" Storyboard.TargetProperty="ScaleY">
                                                        <LinearDoubleKeyFrame KeyTime="0:0:0" Value="0.0" />
                                                        <LinearDoubleKeyFrame KeyTime="0:0:0.38" Value="0.0" />
                                                        <LinearDoubleKeyFrame KeyTime="0:0:0.50" Value="1.0" />
                                                    </DoubleAnimationUsingKeyFrames>
                                                </Storyboard>
                                            </VisualState>
                                            <VisualState x:Name="LeftLandscape">

                                            </VisualState>
                                            <VisualState x:Name="RightLandscape">

                                            </VisualState>
                                        </VisualStateGroup>
                                    </VisualStateManager.VisualStateGroups>
                                    <Border.RenderTransform>
                                        <ScaleTransform x:Name="OuterScaleTransform" />
                                    </Border.RenderTransform>
                                    <Border x:Name="CenterBorder" Margin="12" FlowDirection="LeftToRight" BorderBrush="{StaticResource XX.ColorBrush.WG}" BorderThickness="2.5">
                                        <StackPanel x:Name="InnerBorder" FlowDirection="{TemplateBinding FlowDirection}" Background="{TemplateBinding Background}">
                                            <StackPanel.RenderTransform>
                                                <ScaleTransform x:Name="InnerScaleTransform" />
                                            </StackPanel.RenderTransform>
                                            <ItemsPresenter x:Name="ItemsPresenter" Margin="{TemplateBinding Padding}" FlowDirection="{TemplateBinding FlowDirection}" />
                                        </StackPanel>
                                    </Border>
                                </Border>
                            </ControlTemplate>
                        </Setter.Value>
                    </Setter>
                </Style>
            </MenuFlyout.MenuFlyoutPresenterStyle>

            <MenuFlyoutItem
                Click="xx"
                Text="{Binding xx" />

            <MenuFlyoutItem .../>
        </MenuFlyout>
    </FlyoutBase.AttachedFlyout>