Make release of iOS/Android in React-Native Project

Create a new project using below command.

react-native init myProject

After creation of the project, go to the react-native project directory and perform below command.

react-native run-ios // for ios

react-native run-android//for android

After successfully running of the project, Now we are generating release build of the myProject for both platforms (ios and android).

iOS

First of all, we have to create main.jsbundle, go to the root directory of the react-native project and perform below command in terminal.

react-native bundle --platform ios --dev false --assets-dest ./ios --entry-file index.js --bundle-output ios/main.jsbundle

Now open myProject.xcodeproj/myProject.xcworkspace and go to AppDelegate.m file and add below code in didFinishLaunchingWithOptions method.

// jsCodeLocation = [[NSBundle mainBundle] URLForResource:@”main” withExtension:@”jsbundle”];
jsCodeLocation = [[RCTBundleURLProvider sharedSettings] jsBundleURLForBundleRoot:@”index” fallbackResource:nil];

Now go to Product →Scheme →Edit Scheme →Select Run →Select Release in Build Configuration →select Close.

Select Generic iOS Device and Select Product →Archive

After select Archive option, a dialog will be displayed. Ensure selecting the latest version of your app and click on the “Export…” button on the right side.

Make .ipa file

Android signed Apk

Go to root directory of the react-native project and perform below command

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/

Now we need debug.keystore file that located at .android direactory.

Find .android directory by pressing cmd+shift+G and search ~/.android

Copy debug.keystore file and paste into rootFolder/android/keyStores/

Go to rootFolder/android/app/build.gradle and add below code:

signingConfigs {
debug {
    storeFile file("../keystores/debug.keystore")
    storePassword "android"
    keyAlias "androiddebugkey"
    keyPassword "android"
 }
}

Add below code in buldTypes:

buildTypes {
    releaseStaging {
      signingConfig signingConfigs.debug
     //  matchingFallbacks=['debug','release']
   }
   release {
      minifyEnabled enableProguardInReleaseBuilds
      proguardFiles getDefaultProguardFile("proguard-android.txt"),"proguard-rules.pro"
   }
}

Go to rootFolder/android/gradle.properties and add below line:

android.enableAapt2=false

Now Go to rootFolder/android and open terminal and run below command.

./gradlew assembleReleaseStaging

Optional(Android)

If you get error in making release build then check below version

ext {
  buildToolsVersion = “27.0.3”
  minSdkVersion = 16
  compileSdkVersion = 27
  targetSdkVersion = 27
  supportLibVersion = “27.1.1”
}