A QR Code Scanning and Generating library for iOS 8+, written in Swift 4.

iOS 8+

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

pod 'QRBot'

Follow the steps to use QRBot:

• Steps for scanning QR Code:

1. You need to give permission to access Camera in Info.plist.

2. Make QRCodeScannerViewController superclass of your ViewController class.

 class ViewController: QRCodeScannerViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
    }
 }

3. Conform/ Implement QRCodeScannerDelegate protocol and implement its method to perform your tasks.

 class ViewController: QRCodeScannerViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
    }
 }
 extension ViewController: QRCodeScannerDelegate{
    func scanner(_ connection: AVCaptureConnection, didOutput data: String) {
        print("DemoApp : Data from QR Code - \(data)")
        // Perform your actions here with data from QRCode
    }
 }

( If AVCaptureConnection may show any error, just import AVFoundation in your ViewController. )

 import UIKit
 import AVFoundation
 import QRBot
 
 class ViewController: QRCodeScannerViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
    }
 }
 extension ViewController: QRCodeScannerDelegate{
    func scanner(_ connection: AVCaptureConnection, didOutput data: String) {
        print("DemoApp : Data from QR Code - \(data)")
        // Perform your actions here with data from QRCode
    }
 }

4. Set scannerDelegate property of your ViewController to self.

 class ViewController: QRCodeScannerViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        scannerDelegate = self
    }
 }

5. All set. Now implement your tasks in delegate method.

• Steps for generating QR Code from your own data:

1. Import QRBot in your ViewController.

 import QRBot

2. Call generate() method of QRCode class as shown below:

 import UIKit
 import QRBot
 class YourViewController: UIViewController{
    ovveride func viewDidLoad(){
        super.viewDidLoad()
        QRCode.generate(from: yourStringData,completion: { (image,error) in
            if error == nil{
                if let qrCodeImage = image{
                    // Set qrCodeImage to your ImageView
                    self.imageView.image = qrCodeImage // For example
                }
            }
        })
    }
 }

3. Below the list of supported methods are given. Their usages are as same as shown above.

   1. Simple Black & White QR Code from your String data

   QRCode.generate(from data: String, completion: @escaping (UIImage?,Error?) -> Void)

   2. Simple Black & White QRCode from your String data, with Image format you wish

   QRCode.generate(from data: String, imageFormat format: QRCodeImageFormat,completion: @escaping (UIImage?,Error?) -> Void)

   Here, QRCodeImageFormat is enum having values like .png, .jpg, .jpeg, .gif.

   3. QRCode with different Pattern Colour and Background Colour

   QRCode.generate(from data: String, patternColor color: QRCodeColor,backgroundColor bgcolor: QRCodeColor, completion: @escaping (UIImage?,Error?) -> Void)

   Here, QRCodeColor is enum, having all colours from Apple Colour Pallete.

   4. QRCode with different Pattern Colour and Background Colour, with Image format you wish

   QRCode.generate(from data: String, patternColor color: QRCodeColor,backgroundColor bgcolor: QRCodeColor, imageFormat format: QRCodeImageFormat, completion: @escaping (UIImage?,Error?) -> Void)

Take a look at Example Project for more clarity. To run the example project, clone the repo, and run pod install from the Example directory first.

Hardik Trivedi, [email protected]

Made with ❤️ in India.