IOS Swift web视图控件，隐藏页眉和页脚

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()

        let url = URL(string: "https://example.com")!
        webView.load(URLRequest(url: url))
    }

    func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
        webView.scrollView.contentInset = UIEdgeInsets(top: -webView.safeAreaInsets.top, left: 0, bottom: -webView.safeAreaInsets.bottom, right: 0)
    }
}