flutter - 为什么我会出现堆栈溢出？

问题描述

import 'package:firebase_auth/firebase_auth.dart';
import 'package:firebase_core/firebase_core.dart';
import 'package:flutter/material.dart';
import 'package:keol_beta/providers/authservice.dart';
import 'package:keol_beta/screen/home.dart';
import 'package:keol_beta/screen/login.dart';
import 'package:provider/provider.dart';

void main() {
  WidgetsFlutterBinding.ensureInitialized();
  runApp(
    ChangeNotifierProvider(
      create: (context) => AuthService(),
      child: MyApp(),
    ),
  );
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
        title: 'Keol Beta',
        theme: ThemeData(
          primarySwatch: Colors.blue,
          visualDensity: VisualDensity.adaptivePlatformDensity,
        ),
        home: MyApp(),
        debugShowCheckedModeBanner: false);
  }
}

FutureBuilder<User> mainMethod(BuildContext context) {
  return FutureBuilder(
    future: Provider.of<AuthService>(context).getUser(),
    builder: (BuildContext context, AsyncSnapshot snapshot) {
      Firebase.initializeApp();
      if (snapshot.connectionState == ConnectionState.done) {
        if (snapshot.error != null) {
          print("ini error di main");
          return Text(snapshot.error.toString());
        }
        print("Connect Done " + snapshot.toString());
        return snapshot.hasData
            // ? HomePage(currentUser: snapshot.data)
            // ? HomePage()
            // : LoginPage();
            ? LoginPage()
            : HomePage();
      } else {
        print("Connect Failure");
        return Center(
          child: Container(
            child: CircularProgressIndicator(),
            alignment: Alignment(0, 0),
          ),
        );
      }
    },
  );
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);
  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  bool _initialized = false;
  bool _error = false;

  void initializeFlutterFire() async {
    try {

      await Firebase.initializeApp();
      setState(() {
        _initialized = true;
      });
    } catch (e) {

      setState(() {
        _error = true;
      });
    }
  }

  @override
  void initState() {
    initializeFlutterFire();
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    
    if (_error) {
      return showAlertDialog(context, "error");
    }

    
    if (!_initialized) {
      return showAlertDialog(context, "loading");
    }

    return mainMethod(context);
  }
}

showAlertDialog(BuildContext context, String value) {
  
  Widget okButton = TextButton(
    child: Text("OK"),
    onPressed: () {},
  );

  
  AlertDialog alert = AlertDialog(
    title: Text("Error"),
    content: Text(value),
    actions: [
      okButton,
    ],
  );

  
  showDialog(
    context: context,
    builder: (BuildContext context) {
      return alert;
    },
  );
}

所以，我正在为我的学士学位做我的最后一个项目，而且还是新的。我正在尝试升级我的依赖项

firebase_core: ^0.7.0

之前是 0.5.0，在新版本中，它需要初始化默认的 firebase，我正在尝试这样做，但不知何故它得到了堆栈溢出错误。

快3天我什么都没得到，有什么解决办法吗？

标签： flutterdart

void main() async { WidgetsFlutterBinding.ensureInitialized(); await Firebase.initializeApp(); runApp( ChangeNotifierProvider( create: (context) => AuthService(), child: MyApp(), ), ); }

flutter - 为什么我会出现堆栈溢出？

问题描述

解决方案

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