在flutter中访问Firebase用户的当前uid时出错

问题描述

我想用Flutter获取用户的当前uid。

我尝试了以下操作，但返回了错误

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()

解决方法

您必须致电Firebase.initializeApp()

import 'package:firebase_core/firebase_core.dart';

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

,

Firebase现在已更新，需要您在使用任何Firebase产品之前初始化Firebase。 还要确保您的pubspec.yaml文件具有firebase_core：

dependencies:
  flutter:
    sdk: flutter
  firebase_core : ^0.5.0

主要在main.dart的主要功能中初始化Firebase

Firebase.initializeApp();