WKWebView didFinish is not working Swift 4

Question

I am loading a url in WKWebView.

let url = URL(string: "myURL")
let request = URLRequest(url: url!)
webView1.navigationDelegate = self as! WKNavigationDelegate
webView1.load(request)

But, the delegate function,

func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
    print("Finished navigating to url \(webView.url)")
}

not trigger when it complete load.

Then I use KVO for the web view

webView1.addObserver(self, forKeyPath: "loading", options: .new, context: nil)

override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
   if (keyPath == "loading") {
       guard var web1 = object as? WKWebView else { return }
   }
}

Loading is working fine. But, is there any observer available for after load the webview

Answer 1

func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) 

must called if you set navigationDelegate properly.

Have you done this?

class ViewController: UIViewController, WKNavigationDelegate {

}

if you set the above WKNavigationDelegate, your code will be like this,

let url = URL(string: "http://www.google.com")
let request = URLRequest(url: url!)
webView.navigationDelegate = self
webView.load(request)

and delegate method,

func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
     print("Finished navigating to url \(String(describing: webView.url))")
}

Hope this helps, let me know in case of any queries.

FYI. No need to set external observers.

UPDATE

Enable App Transport Security in your info.plist like this?

<key>NSAppTransportSecurity</key>
<dict>
    <key>NSAllowsArbitraryLoads</key>
    <true/>
</dict>