react-native-qr-decode-image-camera

yarn add react-native-qr-decode-image-camera
or
npm install react-native-qr-decode-image-camera
run
npm install

Install react native camera and give necessary permission

then run

cd ios
pod install

then
react-native run-android
or
react-native run-ios

import React, { Component } from "react";
import {
  Platform,
  StyleSheet,
  Text,
  View,
  TouchableOpacity
} from "react-native";
import { QRscanner } from "react-native-qr-decode-image-camera";

export default class Scanner extends Component {
  constructor(props) {
    super(props);
    this.state = {
      flashMode: false,
      zoom: 0.2
    };
  }
  render() {
    return (
      <View style={styles.container}>
        <QRscanner
          onRead={this.onRead}
          renderBottomView={this.bottomView}
          flashMode={this.state.flashMode}
          zoom={this.state.zoom}
          finderY={50}
        />
      </View>
    );
  }
  bottomView = () => {
    return (
      <View
        style={{ flex: 1, flexDirection: "row", backgroundColor: "#0000004D" }}
      >
        <TouchableOpacity
          style={{ flex: 1, alignItems: "center", justifyContent: "center" }}
          onPress={() => this.setState({ flashMode: !this.state.flashMode })}
        >
          <Text style={{ color: "#fff" }}>йоба-боба-функция</Text>
        </TouchableOpacity>
      </View>
    );
  };
  onRead = res => {
    console.log(res);
  };
}
const styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: "#000"
  }
});

QRreader

import React, { Component } from "react";
import {
  Platform,
  StyleSheet,
  Text,
  View,
  TouchableOpacity
} from "react-native";
import { QRreader } from "react-native-qr-decode-image-camera";
import ImagePicker from "react-native-image-picker";

export default class Scanner extends Component {
  constructor(props) {
    super(props);
    this.state = {
      reader: {
        message: null,
        data: null
      }
    };
  }
  render() {
    return (
      <View style={styles.container}>
        <TouchableOpacity
          onPress={() => {
            this.openPhoto();
          }}
        >
          <Text style={{ marginTop: 20 }}>просто кек бля</Text>
        </TouchableOpacity>
        <View>
          {!this.state.reader ? (
            <Text>
              {!this.state.reader.message ? "" : `${this.state.reader.message}`}
            </Text>
          ) : (
            <Text>
              {!this.state.reader.message
                ? ""
                : `${this.state.reader.message}:${this.state.reader.data}`}
            </Text>
          )}
        </View>
      </View>
    );
  }

  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;
          }
          QRreader(path)
            .then(data => {
              this.setState({
                reader: {
                  message: "message",
                  data: data
                }
              });
              setTimeout(() => {
                this.setState({
                  reader: {
                    message: null,
                    data: null
                  }
                });
              }, 10000);
            })
            .catch(err => {
              this.setState({
                reader: {
                  message: "message",
                  data: null
                }
              });
            });
        }
      }
    });
  }
}
const styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: "#fff"
  }
});

QRscanner

| method | type | example | Remarks | | ------------------ | ------- | ----------------------------------------------------------------- | ----------------------------------------------------------------------------------------- | | isRepeatScan | boolean | false | whether to allow repeated scanning | | zoom | number | 0 | Camera focal length range 0-1 | | flashMode | bool | false | Turn on the flashlight | | onRead | func | (res) => {} | scan callback | | maskColor | string | '# 0000004D' | mask layer color | | borderColor | string | '# 000000' | border color | | cornerColor | string | '# 22ff00' | Color of corner of scan frame | | borderWidth | number | 0 | border width of scan frame | | cornerBorderWidth | number | 4 | border width of scan frame corner | | cornerBorderLength | number | 20 | width and height of the corner of the scan frame | | rectHeight | number | 200 | Scan frame height | | rectWidth | number | 200 | Scan Frame Width | | finderX | number | 0 | scan frame X axis offset | | finderY | number | 0 | scan frame Y axis offset | | isCornerOffset | bool | true | whether the corners are offset | | cornerOffsetSize | number | 1 | offset | | bottomHeight | number | 100 | Reserved height at the bottom | | scanBarAnimateTime | number | 2500 | scan line time | | scanBarColor | string | '# 22ff00' | scan line color | | scanBarImage | any | null | scan line image | | scanBarHeight | number | 1.5 | scan line height | | scanBarMargin | number | 6 | scanline left and right margin | | hintText | string | 'Put QR code / bar code into the box and scan it automatically' | | | hintTextStyle | object | {color: '# fff', fontSize: 14, backgroundColor: 'transparent'} | hint string style | | hintTextPosition | number | 130 | I dick knows that in this column the shot is written in Chinese understand it yourself))) | | | renderTopView | func | () => {} | render top View | | renderBottomView | func | () => | render bottom View | | isShowScanBar | bool | true | whether to show scan lines | | topViewStyle | object | null | render top container style | | bottomViewStyle | object | null | render bottom container style |