在flutter中访问firebase用户的当前uid时出错[重复]

Question

我想用Flutter获得用户的当前uid。

我尝试跟踪，但返回一个错误

final FirebaseAuth auth = FirebaseAuth.instance;
    void inputData() {
      final User user = auth.currentUser;
      final uid = user.uid;
      print(uid);
      // here you write the codes to input the data into firestore
    }

错误：

════════ Exception caught by widgets library ═══════════════════════════════════════════════════════
[core/no-app] No Firebase App '[DEFAULT]' has been created - call Firebase.initializeApp()

Answer 1

您必须调用firebase.initializeapp()

import 'package:firebase_core/firebase_core.dart';

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