/// <summary>
        /// 卸载
        /// </summary>
        /// <param name="name"></param>
        public void UnloadAsset(string name, bool isUnloadIsUsing = false)
        {
            var path = GetExistPath(name);

            if (path != null)
            {
                var res = manifest.Manifest.GetDirectDependencies(path);
                //创建一个队列
                Queue <string> resQue = new Queue <string>();
                foreach (var r in res)
                {
                    if (AssetbundleMap.ContainsKey(r))
                    {
                        resQue.Enqueue(r);
                    }
                }

                resQue.Enqueue(path);
                foreach (var r in resQue)
                {
                    if (AssetbundleMap.ContainsKey(r))
                    {
                        if (isUnloadIsUsing)
                        {
                            AssetbundleMap[r].assetBundle.Unload(true);
                            AssetbundleMap.Remove(r);
                        }
                        else
                        {
                            AssetbundleMap[r].Unuse();
                        }
                    }
                }

                //移除无用的assetbundle
                var keys = new List <string>(AssetbundleMap.Keys);
                foreach (var k in keys)
                {
                    if (AssetbundleMap[k].referenceCount <= 0)
                    {
                        AssetbundleMap.Remove(k);
                    }
                }
            }
            else
            {
                BDebug.Log("路径不存在");
            }
        }