Gists for "Rich and interactive cards in SwiftUI" blog post. Original: https://github.com/MarcoEidinger/ms-adaptivecards-ios-example

AdaptiveCardViewController.swift

import Foundation
import UIKit
import SafariServices

class AdaptiveCardViewController: UIViewController, ACRActionDelegate{

    internal var cardJson: String = "serialized Adaptive Card JSON to be set"
    
    override func viewDidLoad() {
        super.viewDidLoad()
        let cardParseResult = ACOAdaptiveCard.fromJson(cardJson);
        if((cardParseResult?.isValid)!){
            let renderResult = ACRRenderer.render(cardParseResult!.card, config: nil, widthConstraint: 335);

            if(renderResult?.succeeded ?? false)
            {
                let ad = renderResult?.view;
                ad!.acrActionDelegate = (self as ACRActionDelegate);
                self.view.autoresizingMask = [.flexibleHeight];
                self.view.addSubview(ad!);
                ad!.translatesAutoresizingMaskIntoConstraints = false;

                NSLayoutConstraint(item: ad!, attribute: .centerX, relatedBy: .equal, toItem: view, attribute: .centerX, multiplier: 1.0, constant: 0).isActive = true;
                NSLayoutConstraint(item: ad!, attribute: .centerY, relatedBy: .equal, toItem: view, attribute: .centerY, multiplier: 1.0, constant: 3).isActive = true;
            }
        }
    }

    func didFetchUserResponses(_ card: ACOAdaptiveCard, action: ACOBaseActionElement)
    {
        if(action.type == ACRActionType.openUrl){
            let url = URL.init(string:action.url());
            let svc = SFSafariViewController.init(url: url!);
            self.present(svc, animated: true, completion: nil);
        } else if action.type == ACRActionType.submit {
            guard let userInputsAsJson = card.inputs() else { return }
            guard let userInput = String(data: userInputsAsJson, encoding: .utf8) else { return }
            let alert = UIAlertController(title: action.title(), message: "User Input: \(userInput) and Data: \(String(describing: action.data()))", preferredStyle: .alert)
            alert.addAction(UIAlertAction(title: "Ok", style: .default, handler: nil))
            self.present(alert, animated: true)
        }
    }

}