Introduction
热更新在不用的领域有着多重多样的解释。我们关心的app的热更新简单来讲是:无需发新版本,实现app添加新功能。
这里主要介绍Microsoft退出的CodePush平台实现热更新。它是一个云端服务,支持Cordova and React Native的开发者直接更新app, 而无需重新安装apk.
微软的codepush
微软的codepush框架操作原理是这样:
- (1)把react中的js打包,生成一个app(react-native官方就支持到这一步)
- (2)把最新的js包都打包上传到微软的服务器(codepush框架实现)
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(3)在app中判断本地js包的版本号和微软服务器的版本号,然后全部下载下来后实现更新(codepush框架实现)
codepush.sync(paramas)可以实现更新,一般我们放在app启动的时候进行。或者可以在APP中增加一个按钮,点击就运行更新。
实践步骤(Windows)
可以follow官网SOP,也可以参考下面的步骤。
-
Install the CodePush CLI
CLI用来管理account. 安装命令:
npm install -g code-push-cli
-
Create a CodePush account
用微软账号或GitHub 注册CodePush账号
code-push register
其他命令:
- code-push login 登录
- code-push whoami 查看登录
- code-push logout 登出
- code-push session ls 查看session
- code-push session rm
清除session
-
注册your app
注册命令:code-push app add MyApp
注册命令会产生两个key: Staging and Production,可以用”code-push deployment ls codepushdemo -k”查看
MyApp是你app的名称,其他常用命令如下:
code-push app ls 列出注册的apps
code-push app rm
移除注册app code-push app rename
重名注册app -
app中配置configuration(以RN为例,Android)
-
安装插件codepush和link
npm install --save react-native-code-push@latest rnpm link react-native-code-push (需要先安装rnpm: npm i -g rnpm。命令执行时输入步骤2的key)
-
android/app/build.gradle 中添加codepush.gradle
... apply from: "../../node_modules/react-native/react.gradle" apply from: "../../node_modules/react-native-code-push/android/codepush.gradle" ...
- 配置plugin-CodePush
-
MainApplication.java中添加(For React Native >= v0.29)
... // 1. Import the plugin class. import com.microsoft.codepush.react.CodePush; public class MainApplication extends Application implements ReactApplication { private final ReactNativeHost mReactNativeHost = new ReactNativeHost(this) { ... // 2. Override the getJSBundleFile method in order to let // the CodePush runtime determine where to get the JS // bundle location from on each app start @Override protected String getJSBundleFile() { return CodePush.getJSBundleFile(); } @Override protected List<ReactPackage> getPackages() { // 3. Instantiate an instance of the CodePush runtime and add it to the list of // existing packages, specifying the right deployment key. If you don't already // have it, you can run "code-push deployment ls <appName> -k" to retrieve your key. return Arrays.<ReactPackage>asList( new MainReactPackage(), new CodePush(BuildConfig.CODEPUSH_KEY, MainApplication.this, BuildConfig.DEBUG) ); } }; } - build config : build.gradle file (android/app/build.gradle) android { ... buildTypes { debug { ... buildConfigField "String", "CODEPUSH_KEY", '"<INSERT_STAGING_KEY>"' ... } release { ... buildConfigField "String", "CODEPUSH_KEY", '"<INSERT_PRODUCTION_KEY>"' ... } } ... }
-
如果有安装rnpm,也可以用react-native link react-native-code-push 步骤4(rn > 0.27)
-
app中配置升级处理code
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Release an app update (ReactNative)
code-push release-react
Sample Code
注意事项:
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deployment
注册CodePush service, 默认会有产生两个deployment: Staging and Production. (阶段和产品)
如果需要其他部署,可以自己添加管理:Deployment Management
列出所有deployment: code-push deployment ls
[--displayKeys|-k]