Question

我想在列表视图中显示图像，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。我也可以点击图片打开文件。

我注册了控件的PointerEntered和PointerExited事件，并在事件被触发时尝试显示或隐藏filesize / filename / download按钮。

当手指触摸图像时，会触发PointerEntered。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Grid移出listview，但是在stackpanel / Grid中，一切都很顺利。

有人可以帮忙解决这个问题吗？谢谢！

UWP - Grid在Listview中时不会触发PointerExited

0 个答案: