如何在ios上关闭Xamarin.Forms CollectionView的弹跳效果

using Xamarin.Forms.Platform.iOS;

[assembly: ExportRenderer(typeof(Xamarin.Forms.CollectionView), typeof(YourNamespace.CustomCollectionViewRenderer))]
namespace YourNamespace
{
    public class CustomCollectionViewRenderer : CollectionViewRenderer
    {
        protected override void OnElementChanged(ElementChangedEventArgs<CollectionView> e)
        {
            base.OnElementChanged(e);

            if (e.NewElement != null)
            {
                // 关闭弹跳效果
                Control.Bounces = false;
            }
        }
    }
}

using YourNamespace;
using Xamarin.Forms.Platform.iOS;

namespace YouriOSProjectNamespace
{
    [Register("AppDelegate")]
    public partial class AppDelegate : FormsApplicationDelegate
    {
        public override bool FinishedLaunching(UIApplication app, NSDictionary options)
        {
            Forms.Init();
            LoadApplication(new App());

            // 注册自定义Renderer
            Forms.CollectionView.VerifyRenderer = () => new CustomCollectionViewRenderer();

            return base.FinishedLaunching(app, options);
        }
    }
}

<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.YourPage">
    <CollectionView>
        <!-- CollectionView的内容 -->
    </CollectionView>
</ContentPage>