Xamarin表单ListView绑定不会更新

<!-- MainPage.xaml -->
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:local="clr-namespace:YourNamespace"
             x:Class="YourNamespace.MainPage">

    <ListView ItemsSource="{Binding Items}">
        <ListView.ItemTemplate>
            <DataTemplate>
                <TextCell Text="{Binding Name}" />
            </DataTemplate>
        </ListView.ItemTemplate>
    </ListView>

</ContentPage>

// MainPage.xaml.cs
using Xamarin.Forms;

namespace YourNamespace
{
    public partial class MainPage : ContentPage
    {
        public MainPage()
        {
            InitializeComponent();
            BindingContext = new YourViewModel();
        }
    }
}

// YourViewModel.cs
using System.Collections.ObjectModel;

namespace YourNamespace
{
    public class YourViewModel
    {
        public ObservableCollection<YourModel> Items { get; set; }

        public YourViewModel()
        {
            Items = new ObservableCollection<YourModel>();
            // 添加数据项
            Items.Add(new YourModel { Name = "Item 1" });
            Items.Add(new YourModel { Name = "Item 2" });
        }
    }

    public class YourModel
    {
        public string Name { get; set; }
    }
}