VoiceShortcutViewControllerDelegate, full project https://github.com/neungnarakjung/CookBook-Siri-Shortcuts-Example

ViewController.swift

import IntentsUI

extension ViewController: INUIAddVoiceShortcutViewControllerDelegate {
    func addVoiceShortcutViewController(_ controller: INUIAddVoiceShortcutViewController,
                                        didFinishWith voiceShortcut: INVoiceShortcut?,
                                        error: Error?) {
        if let error = error as NSError? {
            print(error)
            return
        }
        updateVoiceShortcuts()
        dismiss(animated: true, completion: nil)
    }

    func addVoiceShortcutViewControllerDidCancel(_ controller: INUIAddVoiceShortcutViewController) {
        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)
            return
        }
        updateVoiceShortcuts()
        dismiss(animated: true, completion: nil)
    }

    func editVoiceShortcutViewController(_ controller: INUIEditVoiceShortcutViewController,
                                         didDeleteVoiceShortcutWithIdentifier deletedVoiceShortcutIdentifier: UUID) {
        updateVoiceShortcuts()
        dismiss(animated: true, completion: nil)
    }

    func editVoiceShortcutViewControllerDidCancel(_ controller: INUIEditVoiceShortcutViewController) {
        dismiss(animated: true, completion: nil)
    }
}