saaf-rn-barcode

react-native-barcode

A smart barcode scanner component for React Native app. The library uses https://github.com/zxing/zxing to decode the barcodes for android, and also supports ios.

Preview

Installation

npm install https://github.com/Gou-Bo/react-native-barcode.git --save

IOS端集成：

1.将\node_modules\react-native-barcode\ios\RCTBarcode\RCTBarCode.xcodeproj 添加到Xcode的Libraries中

2.在Build Phases->Link Binary With Libraries 加入RCTBarCode.xcodeproj\Products\libRCTBarCode.a

3.查看Build Settings->Seach Paths->Header Search Paths是否有$(SRCROOT)/../../../react-native/React并设为recursive

4.将\node_modules\react-native-barcode\ios\raw 文件夹拖到到Xcode项目中（确保文件夹是蓝色的）

5.在info.plist添加相机权限 Privacy - Camera Usage Description：

android端集成：

• 在android/settings.gradle文件中：

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

• 在android/app/build.gradle文件中：

...
dependencies {
    ...
    // 在这里添加
    compile project(':react-native-barcode')
}

• 在MainApplication.java文件中：

...
import com.reactnativecomponent.barcode.RCTCapturePackage;    //这是要添加的

//将原来的代码注释掉，换成这句
private ReactNativeHost mReactNativeHost = new ReactNativeHost(this) {
    //  private final ReactNativeHost mReactNativeHost = new ReactNativeHost(this) {
   ...........
    @Override
    protected List<ReactPackage> getPackages() {
      return Arrays.<ReactPackage>asList(
              new MainReactPackage(),
              //添加以下代码
              new RCTCapturePackage()
      );
    }
  };
  //添加以下代码
  public void setReactNativeHost(ReactNativeHost reactNativeHost) {
    mReactNativeHost = reactNativeHost;
  }
 
  @Override
   public ReactNativeHost getReactNativeHost() {
     return mReactNativeHost;
   }
...

• 在AndroidManifest.xml文件中添加相机权限:

...
<uses-permission android:name="android.permission.CAMERA"/>
<uses-permission android:name="android.permission.VIBRATE"/>

<uses-feature android:name="android.hardware.camera"/>
<uses-feature android:name="android.hardware.camera.autofocus"/>
...

使用

import React, {Component} from 'react';
import {Alert, Dimensions, StyleSheet, Text, TouchableOpacity, View} from 'react-native';
import Barcode from 'react-native-barcode'

let {width: deviceWidth} = Dimensions.get('window');

type Props = {};
export default class App extends Component<Props> {

    //构造方法
    constructor(props) {
        super(props);
        this.state = {
            viewAppear: false,
        };
    }

    componentDidMount() {
        //启动定时器
        this.timer = setTimeout(
            () => this.setState({viewAppear: true}),
            250
        );
    }

    //组件销毁生命周期
    componentWillUnmount() {
        //清楚定时器
        this.timer && clearTimeout(this.timer);
    }

    _onBarCodeRead = (e) => {
        // console.log(`e.nativeEvent.data.type = ${e.nativeEvent.data.type}, e.nativeEvent.data.code = ${e.nativeEvent.data.code}`)
        this._stopScan();
        Alert.alert("二维码", e.nativeEvent.data.code, [
            {text: '确认', onPress: () => this._startScan()},
        ])
    };

    _startScan = (e) => {
        this._barCode.startScan()
    };

    _stopScan = (e) => {
        this._barCode.stopScan()
    }

    _openFlash = (e) => {
        this._barCode.openFlash()
    }

    _closeFlash = (e) => {
        this._barCode.closeFlash()
    }

    render() {
        return (
            <View style={{flex: 1}}>
                {this.state.viewAppear ?
                    <Barcode style={{flex: 1,}}
                             ref={component => this._barCode = component}
                             onBarCodeRead={this._onBarCodeRead}/>
                    : null
                }
                <TouchableOpacity style={styles.inputBtn}
                                  onPress={this._openFlash.bind(this)}>
                    <Text style={styles.inputBtnText}>打开闪光灯</Text>
                </TouchableOpacity>
                <TouchableOpacity style={[styles.inputBtn, {top: 150}]}
                                  onPress={this._closeFlash.bind(this)}>
                    <Text style={styles.inputBtnText}>关闭闪光灯</Text>
                </TouchableOpacity>
            </View>
        );
    }
}

const styles = StyleSheet.create({
    inputBtn: {
        width: deviceWidth,
        position: "absolute",
        top: 100,
        justifyContent: 'center',
        alignItems: 'center'
    },
    inputBtnText: {
        color: '#fff',
        fontSize: 18,
        textDecorationLine: 'underline'
    }
});

Props

Prop	Type	Optional	Default	Description
barCodeTypes	array	Yes		determines the supported barcodeTypes
scannerRectWidth	number	Yes	255	determines the width of scannerRect
scannerRectHeight	number	Yes	255	determines the height of scannerRect
scannerRectTop	number	Yes	0	determines the top shift of scannerRect
scannerRectLeft	number	Yes	0	determines the left shift of scannerRect
scannerLineInterval	number	Yes	3000	determines the interval of scannerLine's movement
scannerRectCornerColor	string	Yes	#09BB0D	determines the color of scannerRectCorner