App.js
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/**
* Sample React Native App
* https://github.com/facebook/react-native
* @flow
*/
import React, { Component } from 'react';
import {
Platform,
StyleSheet,
TouchableOpacity,
Alert,
Text,
View
} from 'react-native';
var ImagePicker = require('react-native-image-picker');
import {readerQR} from 'react-native-lewin-qrcode'
const instructions = Platform.select({
ios: 'Press Cmd+R to reload,\n' +
'Cmd+D or shake for dev menu',
android: 'Double tap R on your keyboard to reload,\n' +
'Shake or press menu button for dev menu',
});
type Props = {};
export default class App extends Component<Props> {
openPhoto(){
console.log('ImagePicker');
ImagePicker.launchImageLibrary({}, (response) => {
console.log('Response = ', response);
if (response.didCancel) {
console.log('User cancelled image picker');
}
else if (response.error) {
console.log('ImagePicker Error: ', response.error);
}
else if (response.customButton) {
console.log('User tapped custom button: ', response.customButton);
}
else {
if(response.uri){
var path = response.path;
if(!path){
path = response.uri;
}
readerQR(path).then((data)=>{
Alert.alert('识别结果',data);
}).catch((err)=>{
Alert.alert('识别失败');
});
}
}
});
}
render() {
return (
<View style={styles.container}>
<Text style={styles.welcome}>
Welcome to React Native Lewin QRCODE!
</Text>
<TouchableOpacity onPress={()=>{
this.openPhoto();
}}>
<Text style={{marginTop: 20}}>打开相册识别二维码</Text>
</TouchableOpacity>
</View>
);
}
}
const styles = StyleSheet.create({
container: {
flex: 1,
justifyContent: 'center',
alignItems: 'center',
backgroundColor: '#F5FCFF',
},
welcome: {
fontSize: 20,
textAlign: 'center',
margin: 10,
},
instructions: {
textAlign: 'center',
color: '#333333',
marginBottom: 5,
},
});