如何从WebView发送消息到React Native？

// 发送消息到React Native
function sendMessageToReactNative(message) {
  window.postMessage(JSON.stringify(message));
}

import React, { useEffect } from 'react';
import { WebView } from 'react-native-webview';

const MyWebView = () => {
  useEffect(() => {
    // 监听WebView发送的消息
    const handleMessage = (event) => {
      const message = JSON.parse(event.nativeEvent.data);
      // 处理消息
      console.log('Received message from WebView:', message);
    };

    // 清除监听
    return () => {
      window.removeEventListener('message', handleMessage);
    };
  }, []);

  return (
    <WebView
      source={{ uri: 'https://example.com' }}
      onMessage={handleMessage}
    />
  );
};

export default MyWebView;