从flutter更新地图中的云firestore数据

dependencies:
  cloud_firestore: ^2.5.4

import 'package:firebase_core/firebase_core.dart';
import 'package:cloud_firestore/cloud_firestore.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp();
  runApp(MyApp());
}

CollectionReference<Map<String, dynamic>> mapDataCollection =
    FirebaseFirestore.instance.collection('map_data');

Stream<QuerySnapshot<Map<String, dynamic>>> mapDataStream =
    mapDataCollection.snapshots();

// 监听数据变化
mapDataStream.listen((QuerySnapshot<Map<String, dynamic>> snapshot) {
  snapshot.docs.forEach((DocumentSnapshot<Map<String, dynamic>> doc) {
    // 处理每个文档的数据
    Map<String, dynamic> data = doc.data();
    // 更新地图中的数据
    updateMapWithData(data);
  });
});

void updateMapWithData(Map<String, dynamic> data) {
  // 解析数据并更新地图
  // ...
}