WKWebView Navigation Delegate Not Called - swift

Question

I am having difficulty getting a WKWebview to call its delegate methods, namely the did finish one.
I am attempting something similar to this post generating a pdf report using html loaded into a WKWebView;
WKWebView not calling navigation delegate methods
However trying the suggestion there, that doesn't work for me. I have a WKWebView made in a separate class to the View controller that will be calling its methods.
If I strip things right down and just try to simply load a website in the WebView to see if the delegate functions get called I get nothing.
Here is my test class;
import UIKit
import WebKit
class TestWebview: NSObject {
let webView = WKWebView ()
func loadWebsite () {
print ("LOAD TEST CALLED")
webView.navigationDelegate = self
let link = URL(string: "https://www.apple.com")!
let request = URLRequest(url: link)
webView.load(request)
}
}
extension TestWebview: WKNavigationDelegate {
func webView(_ webView: WKWebView, didCommit navigation: WKNavigation!) {
print ("DID COMMIT")
}
func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
print ("FINISHED LOADING")
}
}
And here is how I am calling it in a separate view controller;
override func viewDidLoad() {
super.viewDidLoad()
let test = TestWebview ()
test.loadWebsite()
}
Although if I put a WKWebView as an outlet into a view controller using Storyboards then the delegate methods do get called. I am trying to avoid this however as I don't want to see a web view in the view controller and want to keep all the code for that separate in another class.
Am I missing something? Checking various other posts on Stack Overflow about this hasn't given me any solutions other than making sure the navigation delegate is being set, which I am. Any help would be greatly appreciated.

Answer 1

You need to move let test = TestWebview () to class level, otherwise this object is going to be evicted when viewDidLoad completes: the navigationDelegate is defined as weak, so it's not going to prevent it either.