iOS的Xamarin.Forms ListView ItemTapped背景

<ListView ItemsSource="{Binding Items}" ItemTapped="OnItemTapped">
    <ListView.ItemTemplate>
        <DataTemplate>
            <ViewCell>
                <ViewCell.View>
                    <StackLayout BackgroundColor="{Binding BackgroundColor}">
                        <Label Text="{Binding Title}" />
                    </StackLayout>
                </ViewCell.View>
            </ViewCell>
        </DataTemplate>
    </ListView.ItemTemplate>
</ListView>

ListView listView = new ListView();
listView.ItemsSource = items;
listView.ItemTapped += OnItemTapped;

DataTemplate dataTemplate = new DataTemplate(() =>
{
    StackLayout stackLayout = new StackLayout();
    stackLayout.SetBinding(StackLayout.BackgroundColorProperty, "BackgroundColor");

    Label label = new Label();
    label.SetBinding(Label.TextProperty, "Title");

    stackLayout.Children.Add(label);

    return new ViewCell { View = stackLayout };
});

listView.ItemTemplate = dataTemplate;

void OnItemTapped(object sender, ItemTappedEventArgs e)
{
    if (e.Item is MyItem item)
    {
        item.BackgroundColor = Color.Yellow;
    }
}