listview - Xamarin Forms ListView onpressing 事件

Question

我想在按下项目时通过绑定(bind)(以编程方式)更改 IconToShow 属性来更改图像。

如何触发 OnPress 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>

Answer 1

因此，对于单元格内的 LongPress 事件，您需要单元格的自定义渲染器来执行您需要的操作，这里有一些链接可以帮助您:

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/27323/how-can-i-recognize-long-press-gesture-in-xamarin-forms

希望这对您有所帮助。