如何在 UWP 应用中始终显示滚动条？
滚动条总是在几秒钟后消失。
我尝试过设置ScrollViewer.VerticalScrollBarVisibility="Visible"，但滚动条仍然消失。
我已经看过了Xaml UI 基础示例 https://github.com/Microsoft/Windows-universal-samples/tree/master/Samples/XamlUIBasics，并且无论我设置什么属性，滚动条也会在这里消失。
这个答案 https://stackoverflow.com/a/10627338/1438809对于 Windows Phone 8，建议修改滚动查看器模板，但这似乎有点矫枉过正。
有任何想法吗？
对于 UWP 使用此样式
<!-- In default here i enabled horizontal scrollbar visibility and mode you can disable it if you want -->
<Style x:Key="MyScrollViewerStyle" TargetType="ScrollViewer">
<Setter Property="HorizontalScrollMode" Value="Enabled"/>
<Setter Property="VerticalScrollMode" Value="Enabled"/>
<Setter Property="IsHorizontalRailEnabled" Value="True"/>
<Setter Property="IsVerticalRailEnabled" Value="True"/>
<Setter Property="IsTabStop" Value="False"/>
<Setter Property="ZoomMode" Value="Disabled"/>
<Setter Property="HorizontalContentAlignment" Value="Left"/>
<Setter Property="VerticalContentAlignment" Value="Top"/>
<Setter Property="VerticalScrollBarVisibility" Value="Visible"/>
<Setter Property="HorizontalScrollBarVisibility" Value="Visible"/>
<Setter Property="Padding" Value="0"/>
<Setter Property="BorderThickness" Value="0"/>
<Setter Property="BorderBrush" Value="Transparent"/>
<Setter Property="Background" Value="Transparent"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ScrollViewer">
<Border BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}">
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="ScrollingIndicatorStates">
<VisualState x:Name="TouchIndicator">
<Storyboard>
<FadeOutThemeAnimation TargetName="ScrollBarSeparator"/>
<ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetProperty="IndicatorMode" Storyboard.TargetName="VerticalScrollBar">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<ScrollingIndicatorMode>TouchIndicator</ScrollingIndicatorMode>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetProperty="IndicatorMode" Storyboard.TargetName="HorizontalScrollBar">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<ScrollingIndicatorMode>TouchIndicator</ScrollingIndicatorMode>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
<VisualState x:Name="MouseIndicator">
<Storyboard>
<FadeInThemeAnimation TargetName="ScrollBarSeparator"/>
<ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetProperty="IndicatorMode" Storyboard.TargetName="VerticalScrollBar">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<ScrollingIndicatorMode>MouseIndicator</ScrollingIndicatorMode>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
<ObjectAnimationUsingKeyFrames Duration="0" Storyboard.TargetProperty="IndicatorMode" Storyboard.TargetName="HorizontalScrollBar">
<DiscreteObjectKeyFrame KeyTime="0">
<DiscreteObjectKeyFrame.Value>
<ScrollingIndicatorMode>MouseIndicator</ScrollingIndicatorMode>
</DiscreteObjectKeyFrame.Value>
</DiscreteObjectKeyFrame>
</ObjectAnimationUsingKeyFrames>
</Storyboard>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<Grid Background="{TemplateBinding Background}">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<ScrollContentPresenter x:Name="ScrollContentPresenter" Grid.ColumnSpan="2" ContentTemplate="{TemplateBinding ContentTemplate}" Margin="{TemplateBinding Padding}" Grid.RowSpan="2"/>
<ScrollBar x:Name="VerticalScrollBar" Grid.Column="1" HorizontalAlignment="Right" IsTabStop="False" Maximum="{TemplateBinding ScrollableHeight}" Orientation="Vertical" Visibility="{TemplateBinding ComputedVerticalScrollBarVisibility}" Value="{TemplateBinding VerticalOffset}" ViewportSize="{TemplateBinding ViewportHeight}"/>
<ScrollBar x:Name="HorizontalScrollBar" IsTabStop="False" Maximum="{TemplateBinding ScrollableWidth}" Orientation="Horizontal" Grid.Row="1" Visibility="{TemplateBinding ComputedHorizontalScrollBarVisibility}" Value="{TemplateBinding HorizontalOffset}" ViewportSize="{TemplateBinding ViewportWidth}"/>
<Border x:Name="ScrollBarSeparator" Background="{ThemeResource SystemControlPageBackgroundChromeLowBrush}" Grid.Column="1" Grid.Row="1"/>
</Grid>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
然后在滚动查看器中引用它
<ScrollViewer Style="{StaticResource MyScrollViewerStyle}" Height="680" Width="480" HorizontalAlignment="Center" VerticalAlignment="Center">
<Image Source="/Assets/wallpaper.jpg"/> <!-- or your items -->
</ScrollViewer>
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