WKWebView with UIActivityIndicatorView

WKWebView+UIActivityIndicatorView.swift

import Foundation
import UIKit
import WebKit

class ViewController: UIViewController, WKNavigationDelegate, WKUIDelegate {
    
    var loader: UIActivityIndicatorView!
    @IBOutlet weak var webView: WKWebView!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        webView.uiDelegate = self
        webView.navigationDelegate = self
        
        loader = UIActivityIndicatorView()
        loader.center = self.view.center
        loader.hidesWhenStopped = true
        loader.style = UIActivityIndicatorView.Style.large
        
        self.view.addSubview(loader)
        
        let myURL = URL(string:"https://www.sepettte.com")
        let myRequest = URLRequest(url: myURL!)
        webView.load(myRequest)
    }
    
    func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
        print("didFinish")
        showLoader(status: false)
    }
    
    func webView(_ webView: WKWebView, didStartProvisionalNavigation navigation: WKNavigation!) {
        print("didStartProvisionalNavigation")
        showLoader(status: true)
    }

    func webView(_ webView: WKWebView, didFail navigation: WKNavigation!, withError error: Error) {
        print("didFail")
        showLoader(status: false)
    }
    
    func showLoader(status: Bool) {
        if status {
            loader.startAnimating()
        } else {
            loader.stopAnimating()
        }
    }
}