Generating QR code image in iOS SWIFT

Code to generate QR image in Swift 2.0.

Add Apple's 'Core media' framework to project.

    let reqStr = “string to convert as QR code”

    let data = reqStr.dataUsingEncoding(NSISOLatin1StringEncoding, allowLossyConversion: false)

                

    let filter = CIFilter(name: "CIQRCodeGenerator")

    filter!.setValue(data, forKey: "inputMessage")

                

    let qrImage:CIImage = filter!.outputImage!

        

    //qrImageView is a IBOutlet of UIImageView        

    let scaleX = qrImageView.frame.size.width / qrImage.extent.size.width

    let scaleY = qrImageView.frame.size.height / qrImage.extent.size.height

                

    let resultQrImage = qrImage.imageByApplyingTransform(CGAffineTransformMakeScale(scaleX, scaleY))

    qrImageView.image = UIImage(CIImage: resultQrImage)