ios与js传递json数据

import UIKit
import WebKit

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

    override func viewDidLoad() {
        super.viewDidLoad()
        
        let config = WKWebViewConfiguration()
        config.userContentController.add(self, name: "sendJSON")
        
        webView = WKWebView(frame: self.view.frame, configuration: config)
        self.view.addSubview(webView)
        
        if let url = URL(string: "https://your-web-app.com") {
            let request = URLRequest(url: url)
            webView.load(request)
        }
    }

    func userContentController(_ userContentController: WKUserContentController, didReceive message: WKScriptMessage) {
        if message.name == "sendJSON", let jsonString = message.body as? String {
            do {
                if let jsonData = jsonString.data(using: .utf8) {
                    let json = try JSONSerialization.jsonObject(with: jsonData, options: [])
                    print(json)
                }
            } catch {
                print("JSON解析错误: \(error)")
            }
        }
    }
}

function sendJSONToiOS() {
    const data = { key: "value", array: [1, 2, 3] };
    const jsonString = JSON.stringify(data);
    window.webkit.messageHandlers.sendJSON.postMessage(jsonString);
}