Swift से QR कोड जनरेट करें

import CoreImage
import UIKit

func generateQRCode(from string: String) -> UIImage? {
    let data = string.data(using: .ascii)
    guard let filter = CIFilter(name: "CIQRCodeGenerator") else { return nil }

    filter.setValue(data, forKey: "inputMessage")
    filter.setValue("Q", forKey: "inputCorrectionLevel")

    guard let ciImage = filter.outputImage else { return nil }

    // Scale up for crisp rendering
    let transform = CGAffineTransform(scaleX: 10, y: 10)
    let scaledImage = ciImage.transformed(by: transform)

    return UIImage(ciImage: scaledImage)
}

let qrImage = generateQRCode(from: "https://qrcode.fun")

func generateColoredQRCode(from string: String,
                              foreground: UIColor = .black,
                              background: UIColor = .white) -> UIImage? {
    let data = string.data(using: .ascii)
    guard let qrFilter = CIFilter(name: "CIQRCodeGenerator"),
          let colorFilter = CIFilter(name: "CIFalseColor") else { return nil }

    qrFilter.setValue(data, forKey: "inputMessage")
    qrFilter.setValue("H", forKey: "inputCorrectionLevel")

    colorFilter.setValue(qrFilter.outputImage, forKey: "inputImage")
    colorFilter.setValue(CIColor(color: foreground), forKey: "inputColor0")
    colorFilter.setValue(CIColor(color: background), forKey: "inputColor1")

    guard let output = colorFilter.outputImage else { return nil }
    let transform = CGAffineTransform(scaleX: 10, y: 10)
    return UIImage(ciImage: output.transformed(by: transform))
}