Downloader
几个比较重要的下载回调
- onDataTaskSuccess
- onFileTaskSuccess
- onTaskProgress
- onTaskError
开启了一个线程进行下载，使用到了curl，每个下载文件都会创建一个DownloadTask
manifest下载失败的处理
void AssetsManagerEx::onError(const network::DownloadTask& task, int errorCode, int errorCodeInternal, const std::string& errorStr) { if (task.identifier == VERSION_ID) { // 当收到下载version.manifest失败后，会尝试下载project.manifest CCLOG("AssetsManagerEx : Fail to download version file, step skipped\n"); _updateState = State::PREDOWNLOAD_MANIFEST; downloadManifest(); } else if (task.identifier == MANIFEST_ID) { // 当收到project.manifest也下载失败了，就会抛出异常 dispatchUpdateEvent(EventAssetsManagerEx::EventCode::ERROR_DOWNLOAD_MANIFEST, task.identifier, errorStr, errorCode, errorCodeInternal); _updateState = State::FAIL_TO_UPDATE; } else { if (_downloadingTask.find(task.identifier) != _downloadingTask.end()) { _downloadingTask.erase(task.identifier); } // 热更过程中下载失败 fileError(task.identifier, errorStr, errorCode, errorCodeInternal); } }
update
开始更新下载需要的文件
void AssetsManagerEx::update() { // .. 一些错误检查 _updateEntry = UpdateEntry::DO_UPDATE; switch (_updateState) { case State::FAIL_TO_UPDATE: case State::READY_TO_UPDATE: case State::NEED_UPDATE: { if (_updateEntry == UpdateEntry::DO_UPDATE) { // 一般正常流程都会命中这个逻辑 startUpdate(); } } break; } } void AssetsManagerEx::startUpdate() { if (_updateState == State::READY_TO_UPDATE) { // Start to update 6 files from remote package. msg = StringUtils::format("Start to update %d files from remote package.", _totalToDownload); dispatchUpdateEvent(EventAssetsManagerEx::EventCode::UPDATE_PROGRESSION, "", msg); batchDownload(); // 批量创建下载任务队列 } }
更新成功
触发事件UPDATE_FINISHED，js层收到后软重启即可
cc.audioEngine.stopAll(); cc.game.restart();
Uncaught TypeError: Cannot read property 'emit' of null, location: src/cocos2d-jsb.js:0:0 STACK: [0]_onTouchEnded@src/cocos2d-jsb.js:25740 [1]253.proto.emit@src/cocos2d-jsb.js:41837 [2]_doDispatchEvent@src/cocos2d-jsb.js:15311 [3]dispatchEvent@src/cocos2d-jsb.js:16193 [4]_touchEndHandler@src/cocos2d-jsb.js:15200 [5]_onTouchEventCallback@src/cocos2d-jsb.js:32750 [6]_dispatchEventToListeners@src/cocos2d-jsb.js:32836 [7]_dispatchTouchEvent@src/cocos2d-jsb.js:32785 [8]dispatchEvent@src/cocos2d-jsb.js:33037 [9]handleTouchesEnd@src/cocos2d-jsb.js:39827 [10]_mouseEventsOnElement@src/cocos2d-jsb.js:39986 [11]anonymous@src/cocos2d-jsb.js:40005 [12]dispatchEvent@jsb-adapter/jsb-builtin.js:3077 [13]anonymous@jsb-adapter/jsb-builtin.js:3149
_onTouchEnded: function _onTouchEnded(event) { if (!this.interactable || !this.enabledInHierarchy) return; if (this._pressed) { cc.Component.EventHandler.emitEvents(this.clickEvents, event); this.node.emit("click", this); // 这里报的错 } this._pressed = false; this._updateState(); event.stopPropagation(); },
ERROR: Uncaught TypeError: Cannot read property 'length' of undefined, location: src/cocos2d-jsb.js:0:0 STACK: [0]lookupClasses@src/cocos2d-jsb.js:42198 [1]unpackJSONs@src/cocos2d-jsb.js:42274 [2]unpackJson@src/cocos2d-jsb.js:19647 [3]unpack@src/cocos2d-jsb.js:19680 [4]anonymous@src/cocos2d-jsb.js:19703 [5]finale@src/cocos2d-jsb.js:18985 [6]anonymous@src/cocos2d-jsb.js:20636 [7]anonymous@src/cocos2d-jsb.js:18962 [8]anonymous@jsb-adapter/jsb-engine.js:3183 [9]readFile@jsb-adapter/jsb-engine.js:3149 [10]readJson@jsb-adapter/jsb-engine.js:3171 [11]parseJson@jsb-adapter/jsb-engine.js:3468 [12]download@jsb-adapter/jsb-engine.js:3354 [13]downloadJson@jsb-adapter/jsb-engine.js:3480 [14]invoke@src/cocos2d-jsb.js:18956 [15]process@src/cocos2d-jsb.js:18966 [16]retry@src/cocos2d-jsb.js:20634 [17]download@src/cocos2d-jsb.js:18990 [18]load@src/cocos2d-jsb.js:19700 [19]fetch@src/cocos2d-jsb.js:19514
事件ID
enum class EventCode { ERROR_NO_LOCAL_MANIFEST, ERROR_DOWNLOAD_MANIFEST, ERROR_PARSE_MANIFEST, NEW_VERSION_FOUND, ALREADY_UP_TO_DATE, UPDATE_PROGRESSION, ASSET_UPDATED, ERROR_UPDATING, UPDATE_FINISHED, UPDATE_FAILED, ERROR_DECOMPRESS };
