Xamarin Forms ListView onpressing 事件

当按下项目时，我想通过绑定（以编程方式）更改 IconToShow 属性来更改图像。

如何触发 OnPressed 事件？

<ListView x:Name="listView" ItemSelected="OnItemSelected" ItemsSource="{Binding MainMenuList}" HorizontalOptions="FillAndExpand" VerticalOptions="FillAndExpand" IsVisible="{Binding MenuStyle, Converter={StaticResource not}" SeparatorColor="Blue">
            <ListView.ItemTemplate>
                <DataTemplate>
                    <ViewCell>
                        <ViewCell.View>
                            <Grid>
                                <Grid.RowDefinitions>
                                    <RowDefinition Height="50" />
                                </Grid.RowDefinitions>
                                <Grid.ColumnDefinitions>
                                    <ColumnDefinition Width="10" />
                                    <ColumnDefinition Width="30" />
                                    <ColumnDefinition Width="10" />
                                    <ColumnDefinition Width="Auto" />
                                </Grid.ColumnDefinitions>
                                <Image Source="{Binding IconToShow}" Grid.Row="0" Grid.Column="1"/>
                                <Label Text="{Binding Title}" Grid.Row="0" Grid.Column="3"/>
                            </Grid>
                        </ViewCell.View>
                    </ViewCell>
                </DataTemplate>
            </ListView.ItemTemplate>
        </ListView>

因此，对于单元格内的 LongPress 事件，您将需要单元格的自定义渲染器来执行您需要的操作，以下是一些可能对您有帮助的链接：

https://forums.xamarin.com/discussion/58487/listview-long-press-tap-delete-popup https://forums.xamarin.com/discussion/58487/listview-long-press-tap-delete-popup

https://forums.xamarin.com/discussion/18798/detect-long-tap-on-listview-item https://forums.xamarin.com/discussion/18798/detect-long-tap-on-listview-item

https://forums.xamarin.com/discussion/27323/how-can-i-recognize-long-press-gesture-in-xamarin-forms https://forums.xamarin.com/discussion/27323/how-can-i-recognize-long-press-gesture-in-xamarin-forms

希望这可以帮助。