To display QR codes that can be scanned with other devices using SiriKit, you’ll need to use the SiriKit’s INCreateTaskListIntent or INCreateNoteIntent intents to create a note containing the QR code content. However, it’s important to note that SiriKit does not directly support generating or displaying QR codes. Instead, you can create a note with the QR code content and display it in your app’s user interface. Here’s a detailed approach:

1. Generate QR Code: Use a library like CoreImage or QRCodeGenerator to generate a QR code image based on the content you want to encode. Here’s an example using CoreImage:

import UIKit

func generateQRCode(from string: String) -> UIImage? {
    let data = string.data(using: String.Encoding.ascii)
    guard let filter = CIFilter(name: "CIQRCodeGenerator") else { return nil }
    filter.setValue(data, forKey: "inputMessage")
    guard let outputImage = filter.outputImage else { return nil }
    let context = CIContext()
    guard let cgImage = context.createCGImage(outputImage, from: outputImage.extent) else { return nil }
    return UIImage(cgImage: cgImage)
}

Create Note with QR Code Content: Use SiriKit’s INCreateTaskListIntent or INCreateNoteIntent to create a note containing the QR code content. Pass the QR code image as a media attachment to the intent.

import Intents

func createNoteWithQRCode(content: String) {
    let intent = INCreateTaskListIntent()
    intent.title = "QR Code Note"
    
    if let qrCodeImage = generateQRCode(from: content) {
        let data = qrCodeImage.pngData()
        let attachment = INImage(imageData: data!)
        intent.setImage(attachment, forParameterNamed: \.targetTaskList)
    }
    
    let interaction = INInteraction(intent: intent, response: nil)
    interaction.donate { error in
        if let error = error {
            print("Error donating interaction: \(error.localizedDescription)")
        } else {
            print("Interaction donated successfully")
        }
    }
}

Display Note in App: Once the note is created with the QR code content, you can display it in your app’s user interface. You can use INUIAddVoiceShortcutViewController to display the note and allow the user to add it to Siri.

import IntentsUI

func displayNoteInApp() {
    let intent = INCreateTaskListIntent()
    let addShortcutViewController = INUIAddVoiceShortcutViewController(shortcut: INShortcut(intent: intent))
    addShortcutViewController.delegate = self
    present(addShortcutViewController, animated: true, completion: nil)
}

Handle Add to Siri Action: Implement the INUIAddVoiceShortcutViewControllerDelegate methods to handle the add to Siri action.

With this approach, you’re using SiriKit intents to create a note containing the QR code content. Users can then add this note to Siri for easy access. However, it’s important to note that SiriKit’s capabilities for creating notes may be limited, and you may need to adjust your approach based on your app’s requirements and the available SiriKit intents.