没有创建 Firebase App '[DEFAULT]' - 尽管正在初始化 Firebase，但调用 Firebase.initializeApp())

Question

I have a firebase_service.dart file when I create references to all my services. The code for that is here

import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:firebase_auth/firebase_auth.dart';
import 'package:firebase_storage/firebase_storage.dart';

class FirebaseService {
  FirebaseAuth _auth = FirebaseAuth.instance;
  FirebaseStorage _storage = FirebaseStorage.instance;
  FirebaseFirestore _db = FirebaseFirestore.instance;
  FirebaseService();
}

However I receive this error - Exception has occurred. FirebaseException ([core/no-app] No Firebase App '[DEFAULT]' has been created - call Firebase.initializeApp())

In my main.dart file I have initialized firebase as seen below

void main() async {
  WidgetsFlutterBinding.ensureInitialized(); //Ensures app is initialized first
  await Firebase.initializeApp; 
  GetIt.instance.registerSingleton<FirebaseService>(
    FirebaseService(),
  );
  runApp(const MyApp());
}

However I am seeing a squiggly line under the await keyword and this is the comment - 'await' applied to 'Future Function({String? name, FirebaseOptions? options})', which is not a 'Future'

Could that be the issue? I am not so sure what is wrong here

Answer 1

I got same problem. My Android application is working fine but when using IOS application it's throw this type of exception. make sure you have added GoogleServices-info.plist file in your ios project and google-service.json android folder. If it's not solve your issue then use this code. Also make sure you have configure Android project as per documentation. You have to add dependency in build.gradle.(When you add app in firebase you will get instruction). if all above change not working then in your main.dart

if (Platform.isIOS) {
    await Firebase.initializeApp(
        options: FirebaseOptions(
            apiKey: "your api key Found in GoogleService-info.plist",
            appId: "Your app id found in Firebase",
            messagingSenderId: "Your Sender id found in Firebase",
            projectId: "Your Project id found in Firebase"));
  } else {
    await Firebase.initializeApp();
  }