Swift generate a QR Code from text

GenerateQRFromString.swift

import UIKit
import Foundation

func generateQR(from string: String) -> Data? {
	
	let data = string.data(using: String.Encoding.utf8)
	
	guard let qrFilter = CIFilter(name: "CIQRCodeGenerator") else { return nil }
	qrFilter.setValue(data, forKey: "inputMessage")
	
	guard let qrImage = qrFilter.outputImage else { return nil }
	let scaledImage = qrImage.transformed(by: CGAffineTransform(scaleX: 10, y: 10))
	
	// Get a CIContext
	let context = CIContext()
	guard let cgImage = context.createCGImage(scaledImage, from: scaledImage.extent) else { return nil }
  
	let output = UIImage(cgImage: cgImage)
	return output.pngData()
}

generateQR(from: "xxxx")