我将3d模型放入了资产捆绑包中，并将其存储在firebase存储器中。当应用运行时，我想从firebase加载3d模型，并且希望3d模型成为主相机的子代。但是不幸的是它不起作用。当我运行该应用程序时，我从控制台中的debug.log获取了存储参考URL，但没有下载任何内容，我也调试了代码，没有发现任何错误。这是我最后一年的项目，因此请感谢帮助

using Firebase.Storage;
using System.Threading.Tasks;
using System.Collections;
using UnityEngine;
using System;
using UnityEngine.Networking;

public class Loadmodel2 : MonoBehaviour
{
// Start is called before the first frame update
public GameObject test;



void Start()
{
    FirebaseStorage storage = FirebaseStorage.DefaultInstance;

    Firebase.Storage.StorageReference reference =
    storage.GetReferenceFromUrl("gs://fit-union-221609.appspot.com/assettest1/myasset");

    reference.GetDownloadUrlAsync().ContinueWith((Task<Uri> task) => {
        if (!task.IsFaulted && !task.IsCanceled)
        {
            Debug.Log("Download URL: " + task.Result);

            // ... now download the file via WWW or UnityWebRequest.
            StartCoroutine(Loadcoroutine(task.Result));

        }
    });

}



IEnumerator Loadcoroutine(Uri uri)
{

    using (var www = UnityWebRequestAssetBundle.GetassetBundle(uri))
    {
        yield return www.SendWebRequest();

        if (www.isnetworkError || www.isHttpError)
        {
            Debug.Log(www.error);


        }
        else
        {

            AssetBundle bundle = DownloadHandlerAssetBundle.getcontent(www);

            var mya1 = bundle.LoadAssetasync<GameObject>("BarbarianVariant");
            yield return mya1;

            var obj = Instantiate((GameObject)mya1.asset);
            obj.transform.parent = test.transform;


        }
    }


}
}

这是我想要实现的目标