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rn-qr-generator
Advanced tools
Readme
https://www.npmjs.com/package/rn-qr-generator
$ npm install rn-qr-generator --save
$ react-native link rn-qr-generator
Linking is not needed anymore. react-native@0.60.0+
supports dependencies auto linking.
For iOS you also need additional step to install auto linked Pods (Cocoapods should be installed):
cd ios && pod install && cd ../
Libraries
➜ Add Files to [your project's name]
node_modules
➜ rn-qr-generator
and add RNQrGenerator.xcodeproj
libRNQrGenerator.a
to your project's Build Phases
➜ Link Binary With Libraries
Cmd+R
)<android/app/src/main/java/[...]/MainActivity.java
import com.gevorg.reactlibrary.RNQrGeneratorPackage;
to the imports at the top of the filenew RNQrGeneratorPackage()
to the list returned by the getPackages()
methodandroid/settings.gradle
:
rootProject.name = 'MyApp'
include ':app'
+ include ':rn-qr-generator'
+ project(':rn-qr-generator').projectDir = new File(rootProject.projectDir, '../node_modules/rn-qr-generator/android')
android/app/build.gradle
:
dependencies {
+ compile project(':rn-qr-generator')
}
import RNQRGenerator from 'rn-qr-generator';
RNQRGenerator.generate({
value: 'https://github.com/gevgasparyan/rn-qr-generator',
height: 100,
width: 100,
})
.then(response => {
const { uri, width, height, base64 } = response;
this.setState({ imageUri: uri });
})
.catch(error => console.log('Cannot create QR code', error));
// Detect QR code in image
RNQRGenerator.detect({
uri: PATH_TO_IMAGE
})
.then(response => {
const { values } = response; // Array of detected QR code values. Empty if nothing found.
})
.catch(error => console.log('Cannot detect QR code in image', error));
input properties
Property | Type | Description |
---|---|---|
value | string | Text value to be converted into QR image. (required) |
width | number | Width of the QR image to be generated. (required) |
height | number | Height of the QR image to be generated. (required) |
backgroundColor | string | Background color of the image. (white by default) |
color | string | Color of the image. (black by default) |
fileName | string | Name of the image file to store in FileSystem. (optional) |
correctionLevel | string | Data restoration rate for total codewords. Available values are 'L', 'M', 'Q' and 'H'. ('H' by default) |
base64 | boolean | If true will return base64 representation of the image. (optional, false by default) |
padding | Object | Padding params for the image to be generated: {top: number, left: number, bottom: number, right: number}. (default no padding) |
payload
Property | Type | Description |
---|---|---|
uri | string | Path of the generated image. |
width | number | Width of the generated image. |
height | number | Height of the generated image. |
base64 | boolean | Base64 encoded string of the image. |
input properties
Property | Type | Description |
---|---|---|
uri | string | Local path of the image. Can be skipped if base64 is passed. |
base64 | string | Base64 representation of the image to be scanned. If uri is passed this option will be skipped. |
payload
Property | Type | Description |
---|---|---|
values | string[] | Array of detected QR code values. Empty if nothing found. |
type | string | Type of detected code. |
The following barcode types are currently supported for decoding:
Example of 2FA QR code with Time Based (TOTP) or Counter Based (HOTP)
RNQRGenerator.generate({
...
value: 'otpauth://totp/Example:google@google.com?secret=HKSWY3RNEHPK3PXP&issuer=Issuer',
})
More information about totp can be found here.
This module uses Zxing
library for encoding and decoding codes ( ios, Android).
Some simulators may not generate qr code properly. Use real device if you get an error.
FAQs
React native QR Code generator / reader
The npm package rn-qr-generator receives a total of 4,765 weekly downloads. As such, rn-qr-generator popularity was classified as popular.
We found that rn-qr-generator demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
Did you know?
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