React Native 爬坑问题汇总

• 执行./gradlew assembleRelease报出Unable to resolve module AccessibilityInfo错误

打release包失败，项目配置文件如下，React Native 版本号为0.56.0

"dependencies": {
    "react": "16.4.1",
    "react-native": "^0.56.0"
},
"devDependencies": {
    "babel-jest": "23.4.2",
    "babel-preset-react-native": "5",
    "jest": "23.5.0",
    "react-test-renderer": "16.4.1"
},

错误原因：这是React Native0.56.0最新版本的携带的错误，问题只会发生在Windows操作系统，mac不会。

解决方法：修改packjosn配置文件，降低到稳定版本

"dependencies": {
    "react": "^16.4.1",
    "react-native": "^0.55.4"
},
"devDependencies": {
    "babel-preset-react-native": "^4.0.0",
},

然后依次执行cmd命令

npm update
npm cache clean --force
cd android
gradlew clean
cd..
react-native run-android

• React Native Release包启动闪退，报出Unable to load script from assets 'index.android.bundle'错误

issue截图：

image.png

错误信息：

AndroidRuntime: FATAL EXCEPTION: Thread-2
       Process: com.awesomeproject, PID: 3218
       java.lang.RuntimeException: Unable to load script from assets 'index.android.bundle'. Make sure your bundle is packaged correctly or you're running a packager server.
       at com.facebook.react.bridge.CatalystInstanceImpl.jniLoadScriptFromAssets(Native Method)
       at com.facebook.react.bridge.CatalystInstanceImpl.loadScriptFromAssets(CatalystInstanceImpl.java:216)
       at com.facebook.react.bridge.JSBundleLoader$1.loadScript(JSBundleLoader.java:31)
       at com.facebook.react.bridge.CatalystInstanceImpl.runJSBundle(CatalystInstanceImpl.java:234)
       at com.facebook.react.ReactInstanceManager.createReactContext(ReactInstanceManager.java:1114)
       at com.facebook.react.ReactInstanceManager.access$900(ReactInstanceManager.java:113)
       at com.facebook.react.ReactInstanceManager$5.run(ReactInstanceManager.java:911)
       at java.lang.Thread.run(Thread.java:761)

错误原因：找不到android/app/src/main/assets/index.android.bundle文件

解决方法：每次编译打包之前需要先执行 js 文件的打包(即生成离线的 jsbundle 文件)。具体的 js 打包命令如下：

react-native bundle --platform android --dev false --entry-file index.js --bundle-output android/app/src/main/assets/index.android.bundle --assets-dest android/app/
src/main/res/

如果 assets 目录不存在，则需要提前自己创建一个。
 

未完待续，持续更新~~~~~