如何将WKWebview的容器内容高度调整为webview内容？

import UIKit
import WebKit

class ViewController: UIViewController, WKNavigationDelegate {
    var webView: WKWebView!
    var containerView: UIView!

    override func viewDidLoad() {
        super.viewDidLoad()

        // 创建容器视图
        containerView = UIView(frame: CGRect(x: 0, y: 0, width: view.frame.width, height: 0))
        containerView.translatesAutoresizingMaskIntoConstraints = false
        view.addSubview(containerView)

        // 创建WKWebView
        let webViewConfiguration = WKWebViewConfiguration()
        webView = WKWebView(frame: containerView.bounds, configuration: webViewConfiguration)
        webView.translatesAutoresizingMaskIntoConstraints = false
        webView.navigationDelegate = self
        containerView.addSubview(webView)

        // 添加约束
        NSLayoutConstraint.activate([
            containerView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
            containerView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
            containerView.topAnchor.constraint(equalTo: view.topAnchor),
            containerView.bottomAnchor.constraint(equalTo: view.bottomAnchor),
            webView.leadingAnchor.constraint(equalTo: containerView.leadingAnchor),
            webView.trailingAnchor.constraint(equalTo: containerView.trailingAnchor),
            webView.topAnchor.constraint(equalTo: containerView.topAnchor),
            webView.bottomAnchor.constraint(equalTo: containerView.bottomAnchor)
        ])

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

    func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
        // 获取WebView内容高度
        webView.evaluateJavaScript("document.readyState", completionHandler: { (complete, error) in
            if complete != nil {
                webView.evaluateJavaScript("document.body.scrollHeight", completionHandler: { (height, error) in
                    if let contentHeight = height as? CGFloat {
                        // 调整容器高度
                        self.containerView.frame.size.height = contentHeight
                    }
                })
            }
        })
    }
}