从WKWebview检索HTTP响应头

import WebKit

class ViewController: UIViewController, WKNavigationDelegate {

    override func viewDidLoad() {
        super.viewDidLoad()

        let webView = WKWebView(frame: view.bounds)
        webView.navigationDelegate = self
        view.addSubview(webView)

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

    func webView(_ webView: WKWebView, decidePolicyFor navigationResponse: WKNavigationResponse, decisionHandler: @escaping (WKNavigationResponsePolicy) -> Void) {
        if let httpResponse = navigationResponse.response as? HTTPURLResponse {
            let headers = httpResponse.allHeaderFields
            // 在这里可以处理响应头信息
            print(headers)
        }

        decisionHandler(.allow)
    }
}