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我想在列表视图中显示图像，并且指针在图像上方，我将在图像底部显示文件大小/文件名和下载按钮。我也可以通过点击图像打开文件。

我注册了控件的 PointerEntered 和 PointerExited 事件，并尝试在触发事件时显示或隐藏文件大小/文件名/下载按钮。

当手指触摸图像时，PointerEntered 被触发。但是，在触摸屏（手机、平板电脑）上，当手指离开图像时，不会触发 PointerExited 事件。当我在平板电脑上使用鼠标操作时，一切正常。

这是我的代码片段：

<Grid>
                        <Interactivity:Interaction.Behaviors>
                            <Core:EventTriggerBehavior EventName="PointerEntered" >
                                <Core:InvokeCommandAction Command="{Binding ShowFileInfoCommand}"></Core:InvokeCommandAction>
                            </Core:EventTriggerBehavior>
                            <Core:EventTriggerBehavior EventName="PointerExited" >
                                <Core:InvokeCommandAction Command="{Binding HideFileInfoCommand}"></Core:InvokeCommandAction>
                            </Core:EventTriggerBehavior>
                        </Interactivity:Interaction.Behaviors>
                        <Image Source="{Binding ThumbnailUri}" Stretch="{Binding ImageStretch}" MaxHeight="200" MaxWidth="350" Height="{Binding FileHeight}" HorizontalAlignment="Right">
                            <Interactivity:Interaction.Behaviors>
                                <Core:EventTriggerBehavior EventName="Tapped" >
                                    <Core:InvokeCommandAction Command="{Binding ConversationRoom.OpenFileFlipViewCommand,Source={StaticResource Locator}}" CommandParameter="{Binding}"/>
                                </Core:EventTriggerBehavior>
                                <Core:EventTriggerBehavior EventName="RightTapped">
                                    <Core:InvokeCommandAction Command="{Binding RightTappedMessageCommand}"/>
                                </Core:EventTriggerBehavior>
                            </Interactivity:Interaction.Behaviors>
                        </Image>
                        <Grid Background="White" Opacity="0.75" Height="50" x:Name="InfoGrid" VerticalAlignment="Bottom" Visibility="{Binding NeedShowFileInfo, Converter={StaticResource BoolToVisible}}">
                            <Grid.RowDefinitions>
                                <RowDefinition Height="Auto"/>
                                <RowDefinition Height="Auto"/>
                            </Grid.RowDefinitions>
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition/>
                                <ColumnDefinition/>
                            </Grid.ColumnDefinitions>
                            <TextBlock Grid.Row="0" Margin="6,0,0,6" Text="{Binding FileName}"/>
                            <TextBlock Grid.Row="1" Margin="6,0,0,6" Text="{Binding FileSize}"/>
                            <FontIcon  Grid.Row="1" Grid.Column="1" HorizontalAlignment="Right" Margin="0,0,6,6" Glyph="&#xE82F;" FontFamily="../Assets/fontello.ttf#fontello">
                                <Interactivity:Interaction.Behaviors>
                                    <Core:EventTriggerBehavior EventName="Tapped">
                                        <Core:InvokeCommandAction Command="{Binding DownloadCommand}"/>
                                    </Core:EventTriggerBehavior>
                                </Interactivity:Interaction.Behaviors>
                            </FontIcon>
                        </Grid>
                    </Grid>

如果我将网格移出列表视图，但在堆栈面板/网格中，一切正常。

任何人都可以帮助解决这个问题吗？谢谢！

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