ios与js的交互

import WebKit

class ViewController: UIViewController, WKScriptMessageHandler {
    override func viewDidLoad() {
        super.viewDidLoad()
        
        let webViewConfiguration = WKWebViewConfiguration()
        let userContentController = WKUserContentController()
        userContentController.add(self, name: "nativeHandler")
        webViewConfiguration.userContentController = userContentController
        
        let webView = WKWebView(frame: self.view.frame, configuration: webViewConfiguration)
        self.view.addSubview(webView)
        
        if let url = URL(string: "https://your-web-page.com") {
            let request = URLRequest(url: url)
            webView.load(request)
        }
    }
    
    func userContentController(_ userContentController: WKUserContentController, didReceive message: WKScriptMessage) {
        if message.name == "nativeHandler", let messageBody = message.body as? String {
            print("Received message from JavaScript: \(messageBody)")
        }
    }
}

window.webkit.messageHandlers.nativeHandler.postMessage('Hello from JavaScript');

webView.evaluateJavaScript("document.title") { (result, error) in
    if let title = result as? String {
        print("Page title: \(title)")
    }
}