访问flutter中firebase用户的当前uid时出错

Question

我想获取flutter用户的当前uid。

我尝试了以下操作，但返回错误

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());
}

Answer 2

Firebase现已更新，要求您在使用任何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

并且主要在main.dart 的主要功能中初始化Firebase

Firebase.initializeApp();