Remove context menu from the swift 4.0 webview - ios

Question

I want to disable the context menu ie any action to maintain an element of my WKWebView swift 4
import UIKit
import WebKit
class ViewController: UIViewController, WKNavigationDelegate {
var webView: WKWebView!
override func loadView() {
webView = WKWebView()
webView.navigationDelegate = self
view = webView
}
override func viewDidLoad() {
super.viewDidLoad()
// 1
let url = URL(string: "https://www.google.com")!
webView.load(URLRequest(url: url))
// 2
let refresh = UIBarButtonItem(barButtonSystemItem: .refresh, target: webView, action: #selector(webView.reload))
toolbarItems = [refresh]
navigationController?.isToolbarHidden = false
}
func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
title = webView.title
}
func webView(_ webView: WKWebView, didStartProvisionalNavigation navigation: WKNavigation!) {
//show progress indicator
}
func webView(_ webView: WKWebView, didFail navigation: WKNavigation!, withError error: Error) {
//show error
}
func webView(_ webView: WKWebView, didFailProvisionalNavigation navigation: WKNavigation!, withError error: Error) {
//show error
}
private weak var lastPresentedController : UIViewController?
override func dismiss(animated flag: Bool, completion: (() -> Void)? = nil) {
// WKWebView actions sheets workaround
if presentedViewController != nil && lastPresentedController != presentedViewController {
lastPresentedController = presentedViewController;
presentedViewController?.dismiss(animated: flag, completion: {
completion?();
self.lastPresentedController = nil;
});
} else if lastPresentedController == nil {
super.dismiss(animated: flag, completion: completion);
}
}
}