ViewController that loads an INUIAddVoiceShortcutButton.

ViewController.swift

import UIKit
import IntentsUI

class ViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
        
        let addShortcutButton = INUIAddVoiceShortcutButton(style: .blackOutline)
        let intent = OrderPizzaIntent()
        intent.suggestedInvocationPhrase = "Order pizza"
        addShortcutButton.shortcut = INShortcut(intent: intent)
        addShortcutButton.delegate = self
        
        addShortcutButton.translatesAutoresizingMaskIntoConstraints = false
        view.addSubview(addShortcutButton)
        view.centerYAnchor.constraint(equalTo: addShortcutButton.centerYAnchor).isActive = true
        view.centerXAnchor.constraint(equalTo: addShortcutButton.centerXAnchor).isActive = true
    }
}

extension ViewController : INUIAddVoiceShortcutButtonDelegate {
    func present(_ addVoiceShortcutViewController: INUIAddVoiceShortcutViewController, for addVoiceShortcutButton: INUIAddVoiceShortcutButton) {
        addVoiceShortcutViewController.delegate = self
        present(addVoiceShortcutViewController, animated: true, completion: nil)
    }
    
    func present(_ editVoiceShortcutViewController: INUIEditVoiceShortcutViewController, for addVoiceShortcutButton: INUIAddVoiceShortcutButton) {
        editVoiceShortcutViewController.delegate = self
        present(editVoiceShortcutViewController, animated: true, completion: nil)
    }
}

extension ViewController : INUIAddVoiceShortcutViewControllerDelegate {
    func addVoiceShortcutViewController(_ controller: INUIAddVoiceShortcutViewController,
                                        didFinishWith voiceShortcut: INVoiceShortcut?,
                                        error: Error?) {
        if let error = error as NSError? {
            print("Error adding voice shortuct: %@", error)
        }
        
        controller.dismiss(animated: true, completion: nil)
    }
    
    func addVoiceShortcutViewControllerDidCancel(_ controller: INUIAddVoiceShortcutViewController) {
        controller.dismiss(animated: true, completion: nil)
    }
}

extension ViewController : INUIEditVoiceShortcutViewControllerDelegate {
    func editVoiceShortcutViewController(_ controller: INUIEditVoiceShortcutViewController,
                                         didUpdate voiceShortcut: INVoiceShortcut?,
                                         error: Error?) {
        if let error = error as NSError? {
            print("Error adding voice shortcut: %@", error)
        }
        
        controller.dismiss(animated: true, completion: nil)
    }
    
    func editVoiceShortcutViewController(_ controller: INUIEditVoiceShortcutViewController,
                                         didDeleteVoiceShortcutWithIdentifier deletedVoiceShortcutIdentifier: UUID) {
        controller.dismiss(animated: true, completion: nil)
    }
    
    func editVoiceShortcutViewControllerDidCancel(_ controller: INUIEditVoiceShortcutViewController) {
        controller.dismiss(animated: true, completion: nil)
    }
}