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react-native-qrcode-scanner

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import React, { Component } from 'react';

import { request, PERMISSIONS, RESULTS } from 'react-native-permissions';

import { RNCamera as Camera } from 'react-native-camera';

const CAMERA_FLASH_MODE = Camera.Constants.FlashMode;

export default class QRCodeScanner extends Component {

    cameraType: PropTypes.oneOf(['front', 'back']),

    topContent: PropTypes.oneOfType([PropTypes.element, PropTypes.string]),

    bottomContent: PropTypes.oneOfType([PropTypes.element, PropTypes.string]),

    notAuthorizedView: PropTypes.element,

    permissionDialogTitle: PropTypes.string,

    permissionDialogMessage: PropTypes.string,

    checkAndroid6Permissions: PropTypes.bool,

    flashMode: PropTypes.oneOf(CAMERA_FLASH_MODES),

    onRead: () => console.log('QR code scanned!'),

    permissionDialogMessage: 'Need camera permission',

          easing: Easing.inOut(Easing.quad)

          easing: Easing.inOut(Easing.quad),

      clearTimeout(this._scannerTimeout);

    this.setState({ disableVibrationByUser: true });

    this.setState({ disableVibrationByUser: false });

    if (!this.state.scanning && !this.state.disableVibrationByUser) {

        this._scannerTimeout = setTimeout(

          () => this._setScanning(false),

                this.props.markerStyle ? this.props.markerStyle : null

        androidCameraPermissionOptions={{

          title: this.props.permissionDialogTitle,

          message: this.props.permissionDialogMessage,

          buttonPositive: this.props.buttonPositive

        style={[styles.camera, this.props.cameraStyle]}

        onBarCodeRead={this._handleBarCodeRead.bind(this)}

    const { isAuthorized, isAuthorizationChecked } = this.state;

  "description": "A QR code scanner for React Native.",

    "test": "echo \"Error: no test specified\" && exit 1",

    "postinstall": "opencollective-postinstall"

    "url": "git+https://github.com/moaazsidat/react-native-qrcode-scanner.git"

    "url": "https://github.com/moaazsidat/react-native-qrcode-scanner/issues"

    "@react-native-community/async-storage": "^1.6.1",

    "opencollective-postinstall": "^2.0.2",

    "react-native-permissions": "^2.0.2",

  "homepage": "https://github.com/moaazsidat/react-native-qrcode-scanner#readme",

      "prettier --single-quote --trailing-comma es5 --tab-width 2 --write",

    "url": "https://opencollective.com/react-native-qrcode-scanner"

[![npm version](https://badge.fury.io/js/react-native-qrcode-scanner.svg)](https://badge.fury.io/js/react-native-qrcode-scanner) [![Backers on Open Collective](https://opencollective.com/react-native-qrcode-scanner/backers/badge.svg)](#backers) [![Sponsors on Open Collective](https://opencollective.com/react-native-qrcode-scanner/sponsors/badge.svg)](#sponsors)

A QR code scanner component for React Native built on top of [react-native-camera by Lochlan Wansbrough](https://github.com/lwansbrough/react-native-camera)

Please note, this will also function as a generic barcode scanner by the virtue of the above module supporting barcode scanning, however, this module was initially built as a QR code scanner.

This module was originally written because the author couldn't find a module that could be simply plugged into a project without requiring too much setup.

Looking for active contributors. See [Contribution guide](https://github.com/moaazsidat/react-native-qrcode-scanner/blob/master/CONTRIBUTION.md) for more details.

_**Please note**: Most of the support on debugging new issues, especially with Android, relies on the open source community. The project is on the look out for active contributors who want to maintain this library more rigorously._

With iOS 10 and higher you need to add the "Privacy - Camera Usage Description" key to the info.plist of your project. This should be found in 'your_project/ios/your_project/Info.plist'. Add the following code:

<string>Your message to user when the camera is accessed for the first time</string>

<key>NSPhotoLibraryUsageDescription</key>

<string>Your message to user when the photo library is accessed for the first time</string>

<string>Your message to user when the microsphone is accessed for the first time</string>

With Android 7 and higher you need to add the "Vibration" permission to your AndroidManifest.xml of your project. This should be found in your `android/app/src/main/AndroidManifest.xml` Add the following:

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

[react-native-camera](https://github.com/lwansbrough/react-native-camera) is a dependency for this package that you'll need to add to your project. To install, run the following commands:

1. `npm install react-native-camera --save`

2. `react-native link react-native-camera`

If using an older version of this module with RCTCamera you will need to follow the docs [here](https://github.com/react-native-community/react-native-camera/blob/master/docs/migration.md) to move from the old RCTCamera to the new RNCamera. You will then need to install it as above.

**Versions of this library > 0.0.30 will not support react-native-camera versions less than 1.0.0.**

### To install and start using react-native-qrcode-scanner:

npm install react-native-qrcode-scanner --save

npm install react-native-permissions --save

react-native link react-native-qrcode-scanner

react-native link react-native-permissions

To use react-native-qrcode-scanner, `import` the `react-native-qrcode-scanner` module and use the `<QRCodeScanner />` tag. More usage examples can be seen under the `examples/` folder.

import QRCodeScanner from 'react-native-qrcode-scanner';

import { RNCamera } from 'react-native-camera';

      console.error('An error occured', err)

        flashMode={QRCodeScanner.Constants.FlashMode.torch}

        flashMode={RNCamera.Constants.FlashMode.torch}

            <Text style={styles.textBold}>wikipedia.org/wiki/QR_code</Text> on

            your computer and scan the QR code.

AppRegistry.registerComponent('default', () => ScanScreen);

![screenshot 2017-05-02 15 06 33](https://cloud.githubusercontent.com/assets/5963656/25634528/fae4290a-2f48-11e7-899d-4c91ea079678.png)

Please open an issue if something doesn't work or is not clear enough.

Call this method to programmatically enabling scanning again. Use this by attaching a `ref` like so `<QRCodeScanner ref={(node) => { this.scanner = node }}>` and calling `this.scanner.reactivate()`

default: `(e) => (console.log('QR code scanned!', e))`

Will call this specified method when a QR code or a barcode is detected in the camera's view passing in the event emitted upon reading the code.

When set to `true` this ensures that the camera view fades in after the initial load up instead of being rendered immediately.

Set this to false to prevent the animated fade in of the camera view.

When set to `false`, when a QR code is scanned, the `QRCodeScanner` will not scan another code until it is re-rendered.

When set to `true` this will reactivate the scanning ability of the component.

Use this to configure how long it should take before the `QRCodeScanner` should reactivate.

propType: `QRCodeScanner.Constants.FlashMode`

default: `QRCodeScanner.Constants.FlashMode.auto`

default: `RNCamera.Constants.FlashMode.auto`

FYI: [react-native-camera/flashMode](https://github.com/react-native-community/react-native-camera/blob/master/docs/RNCamera.md#flashmode)

- `QRCodeScanner.Constants.FlashMode.off` turns it off.

- `QRCodeScanner.Constants.FlashMode.on` means camera will use flash in all photos taken.

		@@ -150,3 +150,4 @@ 'use strict';
		toValue: 1,
		easing: Easing.inOut(Easing.quad)
		easing: Easing.inOut(Easing.quad),
		useNativeDriver: true
		})
		@@ -153,0 +154,0 @@ ]).start();

		{
		"name": "react-native-qrcode-scanner",
		"version": "1.4.0",
		"version": "1.4.1",
		"description": "A QR code scanner for React Native.",
		@@ -5,0 +5,0 @@ "main": "index.js",

		@@ -89,2 +89,3 @@ # react-native-qrcode-scanner
		import QRCodeScanner from 'react-native-qrcode-scanner';
		import { RNCamera } from 'react-native-camera';

		@@ -102,3 +103,3 @@ class ScanScreen extends Component {
		onRead={this.onSuccess}
		flashMode={QRCodeScanner.Constants.FlashMode.torch}
		flashMode={RNCamera.Constants.FlashMode.torch}
		topContent={
		@@ -190,4 +191,4 @@ <Text style={styles.centerText}>

		propType: `QRCodeScanner.Constants.FlashMode`
		default: `QRCodeScanner.Constants.FlashMode.auto`
		propType: `RNCamera.Constants.FlashMode`
		default: `RNCamera.Constants.FlashMode.auto`

		@@ -198,6 +199,6 @@ Flash modes

		- `QRCodeScanner.Constants.FlashMode.off` turns it off.
		- `QRCodeScanner.Constants.FlashMode.on` means camera will use flash in all photos taken.
		- `QRCodeScanner.Constants.FlashMode.auto` leaves your phone to decide when to use flash when taking photos, based on the lightning conditions that the camera observes.
		- `QRCodeScanner.Constants.FlashMode.torch` turns on torch mode, meaning the flash light will be turned on all the time (even before taking photo) just like a flashlight.
		- `RNCamera.Constants.FlashMode.off` turns it off.
		- `RNCamera.Constants.FlashMode.on` means camera will use flash in all photos taken.
		- `RNCamera.Constants.FlashMode.auto` leaves your phone to decide when to use flash when taking photos, based on the lightning conditions that the camera observes.
		- `RNCamera.Constants.FlashMode.torch` turns on torch mode, meaning the flash light will be turned on all the time (even before taking photo) just like a flashlight.

		@@ -204,0 +205,0 @@ #### `topContent`

Improved metrics