react-native-qrcode-gen

On iOS, it uses CIQRCodeGenerator as a CIFilter to generate a UIImage

On Android, it uses QRGenearator, a wrapper library for ZXing (Crossing-zebra)

$ npm install react-native-qrcode-gen --save

Prerequisite

If the iOS target does not already contain Swift classes

1. Build Settings > Library Search Path > $(TOOLCHAIN_DIR)/usr/lib/swift/$(PLATFORM_NAME)

2. Build Settings > Build Options > Always Embed Swift Standard Libraries > YES

Mostly automatic installation

$ react-native link react-native-qrcode-gen

Manual installation

iOS

1. In XCode, in the project navigator, right click Libraries > Add Files to [your project's name]
2. Go to node_modules > react-native-qrcode-gen and add RNQrcodeGen.xcodeproj
3. In XCode, in the project navigator, select your project. Add libRNQrcodeGen.a to your project's Build Phases > Link Binary With Libraries
4. Run your project (Cmd+R)

Android

1. Open up android/app/src/main/java/[...]/MainActivity.java

• Add import com.reactlibrary.RNQrcodeGenPackage; to the imports at the top of the file
• Add new RNQrcodeGenPackage() to the list returned by the getPackages() method

2. Append the following lines to android/settings.gradle:

   include ':react-native-qrcode-gen'
   project(':react-native-qrcode-gen').projectDir = new File(rootProject.projectDir, 	'../node_modules/react-native-qrcode-gen/android')

3. Insert the following lines inside the dependencies block in android/app/build.gradle:

     compile project(':react-native-qrcode-gen')

Usage

import React from 'react';
import { StyleSheet } from 'react-native';
import QrcodeView from 'react-native-qrcode-gen';

const styles = StyleSheet.create({
  qrcode: {
    width: 320,
    height: 320,
  },
});

export default () => (
  <QrcodeView
    value={'string value to encode'}
    style={styles.qrcode}
  />
);

Available Props

prop | type | default value ----------|----------------------|-------------- value | string | -