wkwebview 执行js

import UIKit
import WebKit

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

    override func viewDidLoad() {
        super.viewDidLoad()
        
        let config = WKWebViewConfiguration()
        webView = WKWebView(frame: self.view.frame, configuration: config)
        webView.navigationDelegate = self
        self.view.addSubview(webView)
        
        if let url = URL(string: "https://example.com") {
            let request = URLRequest(url: url)
            webView.load(request)
        }
    }

    // 执行 JavaScript 代码
    func runJavaScript() {
        let jsString = "alert('Hello, World!');"
        webView.evaluateJavaScript(jsString, completionHandler: { (result, error) in
            if let error = error {
                print("Error executing JavaScript: \(error.localizedDescription)")
            } else {
                print("JavaScript executed successfully")
            }
        })
    }

    // WKNavigationDelegate 方法
    func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
        runJavaScript()
    }
}