ViewController.swift

import UIKit

class ViewController: CoronaViewController, CoronaViewDelegate {

    override func viewDidLoad() {
        super.viewDidLoad()

        let coronaController = CoronaViewController()  // Step 1
        self.addChildViewController(coronaController)  // Step 2

        let view:CoronaView = coronaController.view as! CoronaView
        view.frame = self.view.frame   // Step 3
        self.view.addSubview(view)     // Step 4
        view.coronaViewDelegate = self;
        view.run();                    // Step 5

        let event = ["name":"nativeMessage", "phase":"loaded", "message":"Hello from Swift!"]
        view.sendEvent(event)
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    func coronaView(_ view: CoronaView, receiveEvent event: [AnyHashable : Any]!) -> Any? {
        print("receive message: \(event["message"]!)")
        return "Nice to meet you!"
    }
}