I am trying to make a call from a javascript function in a UIWebView to Swift in iOS 10. I have setup a very basic project just to try and get this working, the code is below.

import UIKit



class ViewController: UIViewController, UIWebViewDelegate  {    

  @IBOutlet var webView: UIWebView!



    override func viewDidLoad() {

        super.viewDidLoad()



        let url = Bundle.main.url(forResource: products, withExtension: html)

        let request = NSURLRequest(url: url! as URL)

        webView.loadRequest(request as URLRequest)

    }



    @IBAction func closeDocumentViewer() {

        displayView.isHidden = true;

    }



    override func didReceiveMemoryWarning() {

        super.didReceiveMemoryWarning()

    }

}

If I just one to receive a string from a javascript function what would I have to add to the above?