/// <summary>
        /// 保存AssetBundle文件到本地
        /// </summary>
        private void SaveAssetBundle(AssetBundleWriteArgs args)
        {
            FileInfo   fileInfo = new FileInfo(args.Path);
            FileStream fs       = fileInfo.Create();

            //fs.Write(字节数组, 开始位置, 数据长度);
            fs.Write(args.Bytes, 0, args.Bytes.Length);

            fs.Flush();     //文件写入存储到硬盘
            fs.Close();     //关闭文件流对象
            fs.Dispose();   //销毁文件对象
        }
        public void DownLoadResourcesAndSave(string relativePath)
        {
            string            path     = NetSystemFacade.ResourceURL + "/" + relativePath + "." + FileExtension;
            AssetBundleStream abStream = new AssetBundleStream();

            abStream.OnLoadFinish += () =>
            {
                AssetBundleWriteArgs args = new AssetBundleWriteArgs();
                args.Bytes = abStream.Bytes;
                args.Path  = path;
                abStream.WriteResource(args);
            };
            abStream.ReadResouce(path);
        }