android - 错误 : flutter instance of 'future string' ?

Question

我该如何解决？这是一个 flutter 身份验证错误。

GPT this error: flutter instance of 'future string'

这是代码:

import 'package:firebase_auth/firebase_auth.dart';
import 'dart:async';

class Auth {
  FirebaseAuth _auth = FirebaseAuth.instance;

  Future<String> signIn(String email, String password) async {
    FirebaseUser _user = await _auth.signInWithEmailAndPassword(email: email, password: password);
    return _user != null ? _user.uid : null;
  }

  Future<String> currentUser() async {
    FirebaseUser _user = await _auth.currentUser();
    return _user != null ? _user.uid : null;
  }

  Future<void> signOut() async {
    return _auth.signOut();
  }

  Future<void> resetAccount(String email) async {
    await _auth.sendPasswordResetEmail(email: email);
  }
}

Answer 1

这是避免 'future string' 的 flutter 实例的另一种方法？

我会建议你像这样使用你的代码

Future signIn(String email, String password) async {
    FirebaseUser _user = await _auth.signInWithEmailAndPassword(email: email, password: password);
    String data = _user != null ? _user.uid : null;
  }

或者像这样调用登录方法

_performSignIn(_email, _password){
     signIn(_email, _password).then((data), {
            //data will contains either null or uid
            print(data);

})