How to use didFinish navigation on an WKWebView passed to another class - ios

Question

I'm setting up an app, where the WKWebView object is created in one class, and then passed to another class for handling, but when I use didFinish navigation in the second class, it never gets called.
I have added the WKNavigationDelegate protocol, and set navigationDelegate = self
class one: UIViewController {
var webView: WKWebView = WKWebView();
override func viewDidLoad(){
var second = Second()
second.web = webView;
second.test()
}
}
class second: NSObject, WKNavigationDelegate {
var web: WKWebView? = nil;
func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
print("Test")
}
func test(){
self.web!.load(URLRequest(url: URL(string: "https://google.com")!))
}
}
I never see the "Test" message.

Answer 1

Make it an instance var to retain the object so delegate to be called
var second = Second() /// << here
override func viewDidLoad(){
super.viewDidLoad()
......
}
func test(){
self.web!.navigationDelegate = self
self.web!.load(URLRequest(url: URL(string: "https://google.com")!))
}

Answer 2

import UIKit
import WebKit
class WKWebViewController: UIViewController, WKNavigationDelegate {
#IBOutlet weak var webWK: WKWebView!
#IBOutlet weak var activityIndi: UIActivityIndicatorView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
webWK.navigationDelegate = self
let appStoreURL = URL(string: "https://google.com")
webWK.load(URLRequest(url: appStoreURL!))
}
func webView(_ webView: WKWebView, didStartProvisionalNavigation navigation: WKNavigation!) {
activityIndi.startAnimating()
}
func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
activityIndi.stopAnimating()
}
}