EFQRCode: A Swift repository from Eternaldream

EFQRCode is a lightweight, pure-Swift library for generating pretty QRCode image with input watermark or icon and recognizing QRCode from image, it is based on CoreGraphics, CoreImage and ImageIO. EFQRCode provides you a better way to operate QRCode in your app, it works on iOS, macOS, watchOS and tvOS, and it is available through CocoaPods, Carthage and Swift Package Manager. This project is inspired by qrcode.

中文介绍

Overview

Demo

App Store

You can click the App Store button below to download demo, support iOS and tvOS:

You can also click the Mac App Store button below to download demo for macOS:

Manual

To run the example project manually, clone the repo, demos are in the 'Examples' folder, remember run command sh Startup.sh in terminal to get all dependencies first, then open EFQRCode.xcworkspace with Xcode and select the target you want, run.

Or you can run the following command in terminal:

git clone git@github.com:EFPrefix/EFQRCode.git; cd EFQRCode; git submodule update --init --recursive; open 'EFQRCode.xcworkspace'

Requirements

Version	Needs
1.x	Xcode 8.0+ Swift 3.0+ iOS 8.0+ / macOS 10.11+ / tvOS 9.0+
4.x	Xcode 9.0+ Swift 4.0+ iOS 8.0+ / macOS 10.11+ / tvOS 9.0+ / watchOS 2.0+
5.x	Xcode 10.2+ Swift 5.0+ iOS 8.0+ / macOS 10.11+ / tvOS 9.0+ / watchOS 2.0+

Installation

CocoaPods

EFQRCode is available through CocoaPods. To install it, simply add the following line to your Podfile:

pod 'EFQRCode', '~> 5.1.0'

Then, run the following command:

$ pod install

Carthage

Carthage is a decentralized dependency manager that builds your dependencies and provides you with binary frameworks.

You can install Carthage with Homebrew using the following command:

$ brew update
$ brew install carthage

To integrate EFQRCode into your Xcode project using Carthage, specify it in your Cartfile:

github "EFPrefix/EFQRCode" ~> 5.1.0

Run carthage update to build the framework and drag the built EFQRCode.framework into your Xcode project.

Swift Package Manager

The Swift Package Manager is a tool for automating the distribution of Swift code and is integrated into the swift compiler.

Once you have your Swift package set up, adding EFQRCode as a dependency is as easy as adding it to the dependencies value of your Package.swift.

dependencies: [
    .Package(url: "https://github.com/EFPrefix/EFQRCode.git", Version(5, 1, 0))
]

Quick Start

1. Import EFQRCode

Import EFQRCode module where you want to use it:

import EFQRCode

2. Recognition

Get QR Codes from CGImage, maybe there are several codes in a image, so it will return an array:

if let testImage = UIImage(named: "test.png")?.toCGImage() {
    if let tryCodes = EFQRCode.recognize(image: testImage) {
        if tryCodes.count > 0 {
            print("There are \(tryCodes.count) codes in testImage.")
            for (index, code) in tryCodes.enumerated() {
                print("The content of \(index) QR Code is: \(code).")
            }
        } else {
            print("There is no QR Codes in testImage.")
        }
    } else {
        print("Recognize failed, check your input image!")
    }
}

3. Generation

Create QR Code image, quick usage:

//                    content: Content of QR Code
//            size (Optional): Width and height of image
// backgroundColor (Optional): Background color of QRCode
// foregroundColor (Optional): Foreground color of QRCode
//       watermark (Optional): Background image of QRCode

if let tryImage = EFQRCode.generate(
    content: "https://github.com/EFPrefix/EFQRCode",
    watermark: UIImage(named: "WWF")?.toCGImage()
) {
    print("Create QRCode image success: \(tryImage)")
} else {
    print("Create QRCode image failed!")
}

Result:

4. Generation from GIF

You can create GIF QRCode with function generateWithGIF of class EFQRCode, for example:

//                  data: Data of input GIF
//             generator: An object of EFQRCodeGenerator, use for setting
// pathToSave (Optional): Path to save the output GIF, default is temp path
//      delay (Optional): Output QRCode GIF delay, default is same as input GIF
//  loopCount (Optional): Output QRCode GIF loopCount, default is same as input GIF

if let qrcodeData = EFQRCode.generateWithGIF(data: data, generator: generator) {
    print("Create QRCode image success.")
} else {
    print("Create QRCode image failed!")
}

You can get more information from the demo, result will like this:

5. Next

Learn more from User Guide.

Todo

Support GIF
Support more styles

PS

Please select a high contrast foreground and background color combinations;
You should use magnification instead of size if you want to improve the definition of QRCode image, you can also increase the value of them;
Magnification too high／Size too long／Content too much may cause failure;
It is recommended to test the QRCode image before put it into use;
You can contact me if there is any problem, both Issue and Pull request are welcome.

PS of PS: I wish you can click the Star button if this tool is useful for you, thanks, QAQ...

Other Platforms/Languages

Platforms/Languages	Link
Objective-C	https://github.com/z624821876/YSQRCode
Java	https://github.com/SumiMakito/AwesomeQRCode
JavaScript	https://github.com/SumiMakito/Awesome-qr.js
Kotlin	https://github.com/SumiMakito/AwesomeQRCode-Kotlin
Python	https://github.com/sylnsfar/qrcode

Contributors

This project exists thanks to all the people who contribute. [Contribute]

PS: The original generation code of QRCode in watchOS is based on swift_qrcodejs, thanks for ApolloZhu's work.

Donations

If you think this project has brought you help, you can buy me a cup of coffee. If you like this project and are willing to provide further support for it's development, you can choose to become Backer or Sponsor in Open Collective.