IEnumerator LoadResFromServerVersion(ResFinishDownload func)
    {
        var enumerator = downloadFileList.GetEnumerator();

        while (enumerator.MoveNext())
        {
            var element = enumerator.Current;
            yield return(StartCoroutine(DownLoad(SERVER_IP_URL + element, delegate(WWW www)
            {
                ReplaceLocalRes(element, www.bytes);
            })));
        }

        var enumerator1 = deleteFileList.GetEnumerator();

        while (enumerator1.MoveNext())
        {
            var element1 = enumerator1.Current;
            DeleteRes(element1);
        }
        func();
        Debug.LogError("download complete");
    }
    //基本测试代码,资源加载
    public void LoadRes(ResFinishDownload func)
    {
        StartCoroutine(DownLoad(SERVER_RES_URL + VERSION_FILE, delegate(WWW www)
        {
            //是否需要使用XmlDocument?? 待考虑
            XmlDocument XmlDoc = new XmlDocument();
            XmlDoc.LoadXml(www.text);
            XmlElement XmlRoot = XmlDoc.DocumentElement;

            foreach (XmlNode node in XmlRoot.ChildNodes)
            {
                if ((node is XmlElement) == false)
                {
                    continue;
                }

                string file = (node as XmlElement).GetAttribute("FileName");
                string md5  = (node as XmlElement).GetAttribute("MD5");
                if (ServerResVersion.ContainsKey(file) == false)
                {
                    ServerResVersion.Add(file, md5);
                }
            }

            XmlDocument localResXMl = new XmlDocument();
            Debug.LogError("Path" + ResourceLoader.relativePath);
            localResXMl.Load(ResourceLoader.relativePath + "/AssetBundles/Windows/" + VERSION_FILE);
            XmlElement localXmlRoot = localResXMl.DocumentElement;
            foreach (XmlNode lNode in localXmlRoot.ChildNodes)
            {
                if ((lNode is XmlElement) == false)
                {
                    continue;
                }

                string file = (lNode as XmlElement).GetAttribute("FileName");
                string md5  = (lNode as XmlElement).GetAttribute("MD5");
                if (LocalResVersion.ContainsKey(file) == false)
                {
                    LocalResVersion.Add(file, md5);
                }
            }
            foreach (var it in ServerResVersion)
            {
                if (!LocalResVersion.ContainsKey(it.Key))
                {
                    downloadFileList.Add(it.Key);
                }
                else
                {
                    if (!it.Value.Equals(LocalResVersion[it.Key]))
                    {
                        downloadFileList.Add(it.Key);
                    }
                }
            }
            foreach (var it in LocalResVersion)
            {
                if (!ServerResVersion.ContainsKey(it.Key))
                {
                    deleteFileList.Add(it.Key);
                }
            }

            XmlRoot = null;
            XmlDoc  = null;

            //保存xml文件
            ReplaceLocalRes("AssetBundles/" + VERSION_FILE, www.bytes);

            StartCoroutine(LoadResFromServerVersion(func));
        }
                                ));
    }