How can add two filter on barcode image

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Swift

barcode

I'm developing an application in swift that can create barcode.but my problem is that when i want to create barcode for 2textfield such as EmailAddress type of barcode i can not add two filters to it.im very new in swift can any body help me?

@IBOutlet weak var textTextField: UITextField!

@IBOutlet weak var text2TextField: UITextField!
@IBOutlet weak var QRImage: UIImageView!
@IBAction func convertButton(_ sender: Any) {
    if let myString = textTextField.text
    {
     let data = myString.data(using: .ascii, allowLossyConversion: false)
        let data2 = myString.data(using: .ascii, allowLossyConversion: false)

        let filter = CIFilter(name : "CIQRCodeGenerator")
        filter?.setValue(data, forKey: "inputMessage")
        filter?.setValue(data2, forKey: "inputMessage")

        let img = UIImage(ciImage: (filter?.outputImage)!)
        QRImage.image = img
    }
}

What I have tried:

i tried above code but the second filter doesn't work