// 6.下载所有更新文件
private IEnumerator DownloadAssets()
{
// Debug.Log("Updater.DownloadAssets " + _updateList.Count);
Directory.CreateDirectory(GameConfig.PERSISTENT_PATH + "media");
AssetIndexFile oldAssets = AssetIndexData.Instance().GetIndex();
int accumSize = 0;
_downloadedSize = 0;
UpdateProgress();
string rootUrl = _updateSetting.resUrl + _latestVersion + '-' + GameConfig.PLATFORM + '/';
foreach (var asset in _updateList)
{
byte[] bytes = null;
_currentAssetSize = asset.size;
_currentAssetDownloaded = 0;
string url = rootUrl + asset.GetFilename() + "?spm=" + GetRandomValue();
for (int i = 0; i < DOWNLOAD_RETRY_TIMES; i++)
{
WWW downloader = new WWW(url);
_downloader = downloader;
yield return(downloader);
// 下载成功
if (downloader.error == null)
{
bytes = downloader.bytes;
break;
}
yield return(new WaitForSeconds(DOWNLOAD_RETRY_DELAY));
}
if (bytes == null || bytes.Length != asset.size)
{
if (bytes == null)
{
Debug.LogWarning("Updater.DownloadAssets failed " + url);
}
else
{
Debug.LogWarning("Updater.DownloadAssets invalid size of " + url);
}
// 下载更新包失败，弹出重试窗口
_confirmDownload = false;
ShowNoticeDialog(GetText(MESSAGE_NETWORK_ERROR), BUTTON_RETRY, OnRetryCallback);
yield break;
}
// 写入文件
File.WriteAllBytes(asset.GetWritePath(), bytes);
_currentAssetSize = 0;
_currentAssetDownloaded = 0;
_downloader = null;
_downloadedSize += asset.size;
accumSize += asset.size;
UpdateProgress();
// 替换索引
oldAssets.AddAssetInfo(asset);
// 凑齐若干字节后写入索引文件
if (accumSize >= DOWNLOAD_ACCUM_WRITE_INDEX)
{
accumSize = 0;
AssetIndexData.Instance().Save();
}
}
oldAssets.SetVersion(_latest.GetVersion());
AssetIndexData.Instance().Save();
GameConfig.VERSION = AssetIndexData.Instance().GetVersionString();
SetProgressInfo(1, GetText(MESSAGE_COMPLETE), false);
_updateStatus = STATUS_COMPLETE;
NotifyUpdateEnd();
}
