//获取每个版本包的信息
        private VersionData DownloadVersionData(Version version)
        {
            //下载版本信息
            infoAct("Download VersionInfo " + version.ToString());
            string versionDataPath = 
                Path.Combine(PathConfig.GetBundleResourcesFolderByVersion(version), PathConfig.VersionDataName + ".xml");
            string versionData = DownloadManager.Instance.DownLoadText(versionDataPath, errorAct);

            if (versionData == null)
            {
                infoAct("Download VersionInfo Fail");
                Debug.logger.LogError("Download Fail", "Download VersionInfo Fail");
                return null;
            }

            VersionData data = VersionData.ParseXml(XDocument.Parse(versionData));
            //检查应用版本信息
            if (!CheckAppVersion(data))
            {
                infoAct("You need update your app");
                appUpdateAct(data.appVersion);
                return null;
            }
            return data;
        }