如何在Xamarin.Forms中实现ListView的DataTemplate子项方法

<ListView x:Name="myListView">
    <ListView.ItemTemplate>
        <DataTemplate>
            <ViewCell>
                <StackLayout Orientation="Horizontal">
                    <Image Source="{Binding ImageUrl}" WidthRequest="50" HeightRequest="50" />
                    <Label Text="{Binding Title}" VerticalOptions="Center" />
                </StackLayout>
            </ViewCell>
        </DataTemplate>
    </ListView.ItemTemplate>
</ListView>

public partial class MainPage : ContentPage
{
    public MainPage()
    {
        InitializeComponent();

        // 创建数据源
        List<Item> items = new List<Item>
        {
            new Item { ImageUrl = "image1.png", Title = "Item 1" },
            new Item { ImageUrl = "image2.png", Title = "Item 2" },
            new Item { ImageUrl = "image3.png", Title = "Item 3" }
        };

        // 设置数据源
        myListView.ItemsSource = items;

        // 处理子项的点击事件
        myListView.ItemTapped += (sender, e) =>
        {
            Item selectedItem = (Item)e.Item;
            DisplayAlert("Selected Item", selectedItem.Title, "OK");
        };
    }
}

public class Item
{
    public string ImageUrl { get; set; }
    public string Title { get; set; }
}