private IEnumerator LoadWWWBundle(string path, LoadBundleCallback callback)
        {
            var request = new WWW(path.StartsWith("jar:")?path:"file:///" + path);

            while (!request.isDone)
            {
                if (string.IsNullOrEmpty(request.error))
                {
                    yield return(request);
                }
                else
                {
                    break;
                }
            }

            if (string.IsNullOrEmpty(request.error))
            {
                if (callback != null)
                {
                    callback(0, request.assetBundle);
                }
            }
            else
            {
                if (callback != null)
                {
                    Debug.LogErrorFormat("LoadWWWBundle {0} error with {1}", path, request.error);
                    callback(-1, null);
                }
            }

            request.Dispose();
            request = null;
        }
 public virtual void LoadAssetBundle(string path, LoadBundleCallback callback)
 {
     StartCoroutine(LoadWWWBundle(path, callback));
 }