cocos creator 热更新

热更新的使用：官方教程：

官网热更新教程

第一步：先生成配置文件：project.manifest和version.manifest,这两个文件的作用，官网有说明

第二步：创建loading脚本，继承BaseLoading,在属性面板，设置热更新的配置文件和热更新的弹窗

热更新属性面板配置

第三步：loading脚本中实现_fCheckUpdate方法，最后手动调用_fCheck函数，引擎自己会去对比远程和本地的版本文件

第四步：调用startHotUpate函数实现热更新，热更新结束后，游戏会重启，这样获取的就是服务器上最新的资源和脚本

updateCb这个函数中，如果版本是最新的，会进入jsb.EventAssetsManager.ALREADY_UP_TO_DATE:分支，直接读取游戏配置文件进入游戏

this._loadResCfgJson()updateCb这个函数的jsb.EventAssetsManager.UPDATE_PROGRESSION:分支，可以监听到当前下载更新的进度更新的下载进度的监听

event.getDownloadedBytes()当前下载文件的进度

event.getTotalBytes()下载文件的总大小

具体原理可以查看官方教程文档：热更新原理

这里解释下：这个指令

node version_generator.js -v 1.0.0 -uhttp://your-server-address/tutorial-hot-update/remote-assets/-s native/package/ -d assets/

官方的解释是这样的：

-v 指定 Manifest 文件的主版本号。

-u 指定服务器远程包的地址，这个地址需要和最初发布版本中 Manifest 文件的远程包地址一致，否则无法检测到更新。

-s 本地原生打包版本的目录相对路径。

-d 保存 Manifest 文件的地址。

经过几代的变迁，现在一般的路径是：

-s 本地原生打包的版本：默认的构建版本路径:/build/jsb-link下

-d 就是你构建完成后，执行上面那条指令后生成最新的热更新配置文件，生成后的存放位置

所以现在一般是：

node version_generator.js -v 1.10.091 -uhttp://your-server-address/tutorial-hot-update/remote-assets/-s build/jsb-link -d build/jsb-link/

version_generator.js 下载地址：version_generator.js

将生成出来的总的几个传到服务器即可

最后附上代码：

/*** 开始检查更新--前往检测版本差异*/_fCheck () {// Hot update is only available in Native buildif (! this._isNative()) {return;}this._storagePath = ((jsb.fileUtils ? jsb.fileUtils.getWritablePath() : '/') + 'blackjack-remote-asset');console.log('Storage path for remote asset : ' + this._storagePath);// Setup your own version compare handler, versionA and B is versions in string// if the return value greater than 0, versionA is greater than B,// if the return value equals 0, versionA equals to B,// if the return value smaller than 0, versionA is smaller than B.this._versionCompareHandle = function (versionA, versionB) {console.log("JS Custom Version Compare: version A is " + versionA + ', version B is ' + versionB);var vA = versionA.split('.');var vB = versionB.split('.');for (var i = 0; i < vA.length; ++i) {var a = parseInt(vA[i]);var b = parseInt(vB[i] || 0);if (a === b) {continue;}else {return a - b;}}if (vB.length > vA.length) {return -1;}else {return 0;}};// Init with empty manifest url for testing custom manifestthis._am = new jsb.AssetsManager('', this._storagePath, this._versionCompareHandle);if (! cc.sys.ENABLE_GC_FOR_NATIVE_OBJECTS) {this._am.retain();}this._am.setVerifyCallback(function (path, asset) {var compressed = pressed;var expectedMD5 = asset.md5;var relativePath = asset.path;var size = asset.size;if (compressed) {return true;}else {return true;}});if (cc.sys.os === cc.sys.OS_ANDROID) {this._am.setMaxConcurrentTask(2);}this.checkUpdate();},updateCb (event) {var needRestart = false;var failed = false;Com.info('updateCb Code : ' + event.getEventCode())switch (event.getEventCode()){case jsb.EventAssetsManager.ERROR_NO_LOCAL_MANIFEST:console.log("No local manifest file found, hot update skipped.");failed = true;break;case jsb.EventAssetsManager.UPDATE_PROGRESSION:var msg = event.getMessage();if (msg) {console.log('Updated file: ' + msg);}// this._node_HotUpdate.setProgressLength(event.getDownloadedBytes(), event.getTotalBytes());if (this['_hotUpdateProgress']) {this['_hotUpdateProgress'](event.getDownloadedBytes(), event.getTotalBytes())}break;case jsb.EventAssetsManager.ERROR_DOWNLOAD_MANIFEST:case jsb.EventAssetsManager.ERROR_PARSE_MANIFEST:console.log("Fail to download manifest file, hot update skipped.");failed = true;break;case jsb.EventAssetsManager.ALREADY_UP_TO_DATE:failed = true;Com.info('开始进入游戏1')console.log("Already up to date with the latest remote version.");//this._loadResCfgJson()break;case jsb.EventAssetsManager.UPDATE_FINISHED:needRestart = true;console.log('Update finished. ' + event.getMessage());break;case jsb.EventAssetsManager.UPDATE_FAILED:console.log('Update failed. ' + event.getMessage());break;case jsb.EventAssetsManager.ERROR_UPDATING:console.log('Asset update error: ' + event.getAssetId() + ', ' + event.getMessage());break;case jsb.EventAssetsManager.ERROR_DECOMPRESS:console.log(event.getMessage());break;default:break;}if (failed) {cc.eventManager.removeListener(this._updateListener);this._updateListener = null;this._updating = false;}if (needRestart) {cc.eventManager.removeListener(this._updateListener);this._updateListener = null;var searchPaths = jsb.fileUtils.getSearchPaths();var newPaths = this._am.getLocalManifest().getSearchPaths();console.log(JSON.stringify(newPaths));Array.prototype.unshift(searchPaths, newPaths); cc.sys.localStorage.setItem('HotUpdateSearchPaths', JSON.stringify(searchPaths));jsb.fileUtils.setSearchPaths(searchPaths);cc.audioEngine.stopAll();cc.game.restart();}},//检查更新checkUpdate: function () {if (this._am.getState() === jsb.AssetsManager.State.UNINITED) {this._am.loadLocalManifest(this.manifestUrl)// Resolve md5 url/**********官方文档中的nativeUrl字段，在配置文件中是不存在的，导致会找不到本地的对比文件，坑******************* */// var url = this.manifestUrl.nativeUrl;// if (cc.loader.md5Pipe) {//url = cc.loader.md5Pipe.transformURL(url);// }// this._am.loadLocalManifest(url);/**********官方文档中的nativeUrl字段，在配置文件中是不存在的，导致会找不到本地的对比文件，坑******************* */}if (!this._am.getLocalManifest() || !this._am.getLocalManifest().isLoaded()) {// this.panel.info.string = 'Failed to load local manifest ...';return;}/***********这个函数已经弃用，坑**************/// this._am.setEventCallback(this.checkCb.bind(this));/***********这个函数已经弃用，坑**************///函数改成这个this._checkListener = new jsb.EventListenerAssetsManager(this._am, this.checkCb.bind(this));cc.eventManager.addListener(this._checkListener, 1);this._am.checkUpdate();this._updating = true;},/*** 开始热更新--这里开始热更新*/startHotUpate: function () {if (this._am && !this._updating) {// this._am.setEventCallback(this.updateCb.bind(this));// if (this._am.getState() === jsb.AssetsManager.State.UNINITED) {//// Resolve md5 url//var url = this.manifestUrl.nativeUrl;//if (cc.loader.md5Pipe) {// url = cc.loader.md5Pipe.transformURL(url);//}//this._am.loadLocalManifest(url);// }this._updateListener = new jsb.EventListenerAssetsManager(this._am, this.updateCb.bind(this))cc.eventManager.addListener(this._updateListener, 1)if (this._am.getState() === jsb.AssetsManager.State.UNINITED) {this._am.loadLocalManifest(this.manifestUrl)}this._failCount = 0;this._am.update();this._updating = true;}},checkCb (event) {console.log('checkCb Code: ' + event.getEventCode());switch (event.getEventCode()){case jsb.EventAssetsManager.ERROR_NO_LOCAL_MANIFEST:console.log("No local manifest file found, hot update skipped.");break;case jsb.EventAssetsManager.ERROR_DOWNLOAD_MANIFEST:case jsb.EventAssetsManager.ERROR_PARSE_MANIFEST:console.log("Fail to download manifest file, hot update skipped.");//备注处理break;case jsb.EventAssetsManager.ALREADY_UP_TO_DATE:Com.info('开始进入游戏2')console.log("Already up to date with the latest remote version.");//this._loadResCfgJson()break;case jsb.EventAssetsManager.NEW_VERSION_FOUND://this.showUpdateTip();//这里显示更新的提示框break;default:return;}cc.eventManager.removeListener(this._checkListener);this._checkListener = null;this._updating = false;},retry () {if (!this._updating && this._canRetry) {this._canRetry = false;console.log("Retry failed Assets...");this._am.downloadFailedAssets();}},onDestroy: function () {if (this._updateListener) {this._am.setEventCallback(null);this._updateListener = null;}}

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