//加载包清单文件
    public IEnumerator LoadingGameAssetBundleInventoryPackageFile()
    {
        WWW www;

        if (UniGameResources.IsLocalDownloadUrlPath)
        {
            www = WWW.LoadFromCacheOrDownload(FTLibrary.Text.IStringPath.ConnectPath(UniGameResources.downloadUrlPath, UniGameResourcesDefine.GameAssetBundleInventoryPackageFilePath),
                                              UniGameResources.version_GameAssetBundleInventoryPackageFile);
        }
        else
        {
            www = new WWW(FTLibrary.Text.IStringPath.ConnectPath(UniGameResources.downloadUrlPath, UniGameResourcesDefine.GameAssetBundleInventoryPackageFilePath));
        }
        yield return(www);

        if (www.error != null)
        {
            GameRoot.Error(string.Format("资源引导文件下载错误:{0}", www.error));
            yield break;
        }
        byte[] data = null;
        try
        {
#if UNITY_4_3 || UNITY_4_6
            TextAsset textAsset = www.assetBundle.Load(UniGameResourcesDefine.GameAssetBundleInventoryXmlFilePath, typeof(TextAsset)) as TextAsset;
#else
            TextAsset textAsset = www.assetBundle.LoadAsset(UniGameResourcesDefine.GameAssetBundleInventoryXmlFilePath, typeof(TextAsset)) as TextAsset;
#endif
            data = textAsset.bytes;
            UniGameResources.ReleaseOneAssets(textAsset);
            www.assetBundle.Unload(false);
            //当获取一次资源对象的时候实际是克隆一个对象
            //UnityEngine.Object.DestroyObject(www.assetBundle);
            www.Dispose();
        }
        catch (System.Exception ex)
        {
            GameRoot.Error(string.Format("资源引导文件读取错误:{0}", ex.ToString()));
            yield break;
        }

        FTEncipher encipher = null;
        try
        {
            //首先从BASE64转换回来
            data = Convert.FromBase64String(Encoding.ASCII.GetString(data));
            //构建解密组件
            encipher = UniGameResources.AllocXmlFileEncipher();
#if _SupportDeviceVerify
            data = encipher.FileDecrypt(data, true);
#else
            data = encipher.FileDecrypt(data);
#endif //_SupportDeviceVerify
            encipher.Dispose();
            encipher = null;
            MemoryStream s   = new MemoryStream(data);
            XmlDocument  doc = new XmlDocument();
            doc.Load(s);
            s.Close();
            UniGameResources.BuildSystemResourcesPackageTable(doc);
        }
        catch (System.Exception ex)
        {
            GameRoot.Error(string.Format("资源引导文件解析错误:{0}", ex.ToString()));
            if (encipher != null)
            {
                encipher.Dispose();
                encipher = null;
            }
            yield break;
        }
    }