底部溢出164像素，在试图修复的热重加载之后，将出现未实现的对丢失的静态目标的处理。

Question

我的应用程序不再工作了，这昨天起作用了，但是不管我尝试调试什么，即使我没有改变任何东西，只是热重新加载，都会出现未实现的错误。

昨天工作得很好。我的项目上的错误张贴在下面。它用一个列小部件写着，但我不知道它在哪里，因为它昨天运行得很好。

IT应该从LoginScreen开始，而不是直接到主屏幕，因为某种原因，当我尝试我制作的应用程序的github克隆时，它直接进入主屏幕，而不是先登录屏幕。

另外，我没有对我的主屏幕做任何更改，但在login.dart，register.dart上，仅从昨天起，防火墙认证工作，应用程序继续到主屏幕。

我增加了错误的图像

你可以尝试克隆我的项目https://github.com/rolandopeda/syncshop

误差

I/flutter ( 7581): ══╡ EXCEPTION CAUGHT BY RENDERING LIBRARY ╞═════════════════════════════════════════════════════════
I/flutter ( 7581): The following assertion was thrown during layout:
I/flutter ( 7581): A RenderFlex overflowed by 2.0 pixels on the bottom.
I/flutter ( 7581):
I/flutter ( 7581): The relevant error-causing widget was:
I/flutter ( 7581):   Column 
lib\login\login.dart:129
I/flutter ( 7581):
I/flutter ( 7581): The overflowing RenderFlex has an orientation of Axis.vertical.
I/flutter ( 7581): The edge of the RenderFlex that is overflowing has been marked in the rendering with a yellow and
I/flutter ( 7581): black striped pattern. This is usually caused by the contents being too big for the RenderFlex.
I/flutter ( 7581): Consider applying a flex factor (e.g. using an Expanded widget) to force the children of the
I/flutter ( 7581): RenderFlex to fit within the available space instead of being sized to their natural size.
I/flutter ( 7581): This is considered an error condition because it indicates that there is content that cannot be
I/flutter ( 7581): seen. If the content is legitimately bigger than the available space, consider clipping it with a
I/flutter ( 7581): ClipRect widget before putting it in the flex, or using a scrollable container rather than a Flex,
I/flutter ( 7581): like a ListView.
I/flutter ( 7581): The specific RenderFlex in question is: RenderFlex#7e604 relayoutBoundary=up9 OVERFLOWING:
I/flutter ( 7581):   creator: Column ← ConstrainedBox ← Container ← _PointerListener ← Listener ← _GestureSemantics ←
I/flutter ( 7581):     RawGestureDetector ← GestureDetector ← MouseRegion ← Semantics ← _FocusMarker ← Focus ← ⋯
I/flutter ( 7581):   parentData: <none> (can use size)
I/flutter ( 7581):   constraints: BoxConstraints(0.0<=w<=331.4, h=12.0)
I/flutter ( 7581):   size: Size(96.0, 12.0)
I/flutter ( 7581):   direction: vertical
I/flutter ( 7581):   mainAxisAlignment: start
I/flutter ( 7581):   mainAxisSize: max
I/flutter ( 7581):   crossAxisAlignment: center
I/flutter ( 7581):   verticalDirection: down
I/flutter ( 7581): ◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤◢◤
I/flutter ( 7581): ════════════════════════════════════════════════════════════════════════════════════════════════════
I/flutter ( 7581): Another exception was thrown: A RenderFlex overflowed by 164 pixels on the bottom.

════════ Exception caught by widgets library ═══════════════════════════════════
The following _CompileTimeError was thrown building MyApp(dirty):
Unimplemented handling of missing static target

The relevant error-causing widget was
    MyApp 

main.dart

import 'package:firebase_auth/firebase_auth.dart';
import 'package:flutter/material.dart';
import 'package:vmembershipofficial/login/register.dart';
import 'package:vmembershipofficial/screens/home_screen.dart';

import 'login/login.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {

  Widget _getScreenId() {
    return StreamBuilder<FirebaseUser>(
    stream: FirebaseAuth.instance.onAuthStateChanged, //check if we are login
    builder: (BuildContext context, snapshot) {
      if (snapshot.hasData) {
        return HomeScreen();
      } else {
        return LoginPage();
      }
    },
    );
  }
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: _getScreenId(),
      debugShowCheckedModeBanner: false,
      routes:  {
        HomeScreen.id: (context) => HomeScreen(),
        RegisterPage.id: (context) => RegisterPage(),
      },
    );
  }
}

登录

import 'package:flutter/material.dart';
import 'package:vmembershipofficial/login/register.dart';

class LoginPage extends StatefulWidget {
  LoginPage({Key key}) : super(key: key);

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

class _LoginPageState extends State<LoginPage> {
  @override
  Widget build(BuildContext context) {
    return SafeArea(
      child: Scaffold(
        backgroundColor: Color(0xff0D192A),
        body: Container(
          child: ListView(children: <Widget>[
            Padding(
              padding: EdgeInsets.all(10.0),
              child: Container(
                width: 120,
                height: 120,
                margin: EdgeInsets.fromLTRB(0, 50, 0, 0),
                child: Image(
                  image: AssetImage("assets/images/vlogo.png"),
                ),
              ),
            ),
            Padding(
              padding: EdgeInsets.all(5.0),
              child: Container(
                margin: EdgeInsets.all(5.0),
                child: Center(
                  child: Text(
                    "Login",
                    style: TextStyle(
                        color: Colors.white,
                        fontSize: 20,
                        fontWeight: FontWeight.bold),
                  ),
                ),
              ),
            ),
            //TEXTFIELDS //
            Padding(
              padding: EdgeInsets.all(40.0),
              child: Column(
                children: <Widget>[
                  Container(
                    width: MediaQuery.of(context).size.width * 0.5,
                    height: MediaQuery.of(context).size.height * 0.5,
                    padding: EdgeInsets.all(5.0),
                    decoration: BoxDecoration(
                      color: Colors.black,
                      borderRadius: BorderRadius.circular(10),
                    ),
                    child: Center(
                      child: Padding(
                        padding: EdgeInsets.fromLTRB(20, 0, 0, 0),
                        child: TextField(
                            decoration: InputDecoration(
                          border: InputBorder.none,
                          hintText: "Enter Your Email",
                          hintStyle: TextStyle(color: Colors.grey[400]),
                        )),
                      ),
                    ),
                  ),
                  SizedBox(height: 20.0),
                  Container(
                    width: MediaQuery.of(context).size.width,
                    padding: EdgeInsets.all(5.0),
                    decoration: BoxDecoration(
                      color: Colors.black,
                      borderRadius: BorderRadius.circular(10),
                    ),
                    child: Center(
                      child: Padding(
                        padding: EdgeInsets.fromLTRB(20, 0, 0, 0),
                        child: TextField(
                            decoration: InputDecoration(
                          border: InputBorder.none,
                          hintText: "Enter Your Password",
                          hintStyle: TextStyle(color: Colors.grey[400]),
                        )),
                      ),
                    ),
                  ),
                  SizedBox(height: 50),
                  InkWell(
                    onTap: () {
                      setState(() {});
                    },
                    child: Container(
                      height: 50,
                      decoration: BoxDecoration(
                          color: Color.fromRGBO(211, 184, 117, 100)),
                      child: Center(
                        child: Text(
                          "Login",
                          style: TextStyle(
                              color: Colors.white,
                              fontWeight: FontWeight.bold,
                              fontSize: 20),
                        ),
                      ),
                    ),
                  ),
                  SizedBox(height: 40),
                  Container(
                    height: 10,
                    child: Row(
                      mainAxisAlignment: MainAxisAlignment.center,
                      children: <Widget>[
                        Text(
                          "Don't have an account?",
                          style: TextStyle(color: Colors.white, fontSize: 12.0),
                        ),
                        SizedBox(width: 12.0),
                        InkWell(
                          onTap: () {
                            setState(
                              () {
                                Navigator.push(
                                  context,
                                  MaterialPageRoute(
                                      builder: (context) => RegisterPage()),
                                );
                              },
                            );
                          },
                          child: Text(
                            "Register Here",
                            style: TextStyle(
                                color: Color.fromRGBO(211, 184, 117, 100),
                                fontSize: 12.0),
                          ),
                        )
                      ],
                    ),
                  ),
                  SizedBox(height: 10),
                  InkWell(
                    onTap: () {
                      setState(() {});
                    },
                    child: Container(
                        height: MediaQuery.of(context).size.height,
                        child: Column(
                          children: <Widget>[
                            Text(
                              "Forgot password?",
                              style: TextStyle(
                                  color: Colors.white, fontSize: 12.0),
                            ),
                          ],
                        )),
                  ),
                ],
              ),
            ),
          ]),
        ),
      ),
    );
  }
}

主屏幕

import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';
import 'package:vmembershipofficial/Widgets/afterintroducing.dart';
import 'package:vmembershipofficial/Widgets/discount_carousel.dart';
import 'package:vmembershipofficial/Widgets/header_carousel.dart';
import 'package:vmembershipofficial/Widgets/introducing_vmembership.dart';


class HomeScreen extends StatefulWidget {
  static final  String id = 'home_screen';

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

class _HomeScreenState extends State<HomeScreen> {
    int _currentTab = 0;
  @override
  Widget build(BuildContext context) {
    return SafeArea(
          child: Scaffold(
        body: ListView(
          children: <Widget>[
            Padding(
            padding:  EdgeInsets.symmetric(horizontal: 30.0, vertical: 10.0),
              child: Text("Explore V!", style: TextStyle(fontWeight: FontWeight.w600, fontSize: 20.0),
              ),
              ),
          SizedBox(height:5.0),
         HeaderCarousel(),
         SizedBox(height: 30.0),
         Padding(
           padding:  EdgeInsets.symmetric(horizontal: 30.0, vertical: 10.0),
           child: Text("Discount", style: TextStyle(fontWeight: FontWeight.w600, fontSize: 20.0),
           ),
         ),
         Padding(
           padding: EdgeInsets.symmetric(horizontal: 30.0, vertical: 5.0),
           child: Text("Lorem ipsum dolor sit amet, consectetuer adipiscing elit.", style: TextStyle(fontSize: 12.0),),
         ),
         DiscountCarousel(),
         SizedBox(height: 30.0),
         Padding(
           padding:  EdgeInsets.symmetric(horizontal: 30.0, vertical: 10.0),
           child: Text(
             "Introducing V Membership Plus", style: TextStyle(fontSize: 20.0, fontWeight: FontWeight.w600),
           ),
         ),
          Padding(
           padding: EdgeInsets.symmetric(horizontal: 30.0, vertical: 4.0),
           child: Text("Lorem ipsum dolor sit amet, consectetuer adipiscing elit.", style: TextStyle(fontSize: 12.0),),
         ),
         VmembershipPlus(),
         SizedBox(height: 30.0),
         Padding(
           padding:  EdgeInsets.symmetric(horizontal: 30.0, vertical: 10.0),
           child: Text(
             "Lorem Ipsum", style: TextStyle(fontSize: 20.0, fontWeight: FontWeight.w600),
           ),
         ),
          Padding(
           padding: EdgeInsets.symmetric(horizontal: 30.0, vertical: 4.0),
           child: Text("Lorem ipsum dolor sit amet, consectetuer adipiscing elit.", style: TextStyle(fontSize: 12.0),),
         ),
         SizedBox(height: 10.0,),
         AfterIntroducing(),
         SizedBox(height: 10.0,),
         Padding(
           padding: const EdgeInsets.symmetric(horizontal: 30.0),
           child: FlatButton(
               padding: EdgeInsets.all(15.0),
              color: Colors.blue,
              textColor: Colors.white,
              onPressed: () {
              },
              child: Text(
              "LOREM IPSUM",
              style: TextStyle(fontSize: 15.0, fontWeight: FontWeight.w600),
            ),
           ),
         ),
                SizedBox(height: 50.0,),
        ],
        ),
        bottomNavigationBar: BottomNavigationBar(
          type: BottomNavigationBarType.fixed,
          currentIndex: _currentTab, //makes a new variable called current Tab
          onTap: (int value) {
            setState(
              () {
                _currentTab = value;
              },
            );
          },
          items: [
            BottomNavigationBarItem(
              icon: Icon(Icons.search, size: 30.0),
              title: Text('Search', style: TextStyle(fontSize: 12.0),),
            ),
            BottomNavigationBarItem(
              icon: Icon(Icons.favorite),
              title: Text('Favorites', style: TextStyle(fontSize: 12.0),),
            ),
            BottomNavigationBarItem(
              icon: Icon(Icons.home),
              title: Text('Home', style: TextStyle(fontSize: 12.0),),
            ),
            BottomNavigationBarItem(
              icon: Icon(Icons.message),
              title: Text('Messages', style: TextStyle(fontSize: 12.0),),
            ),
            BottomNavigationBarItem(
              // icon: CircleAvatar(
              //   backgroundImage: NetworkImage(
              //       'https://randomuser.me/api/portraits/men/31.jpg'),
              //   radius: 15.0,
              // ),
              icon: Icon(Icons.account_circle),
              title: Text('Account', style: TextStyle(fontSize: 12.0),),
            ),
          ],
        ),
      ),
    );
  }
}

寄存器

import 'package:flutter/material.dart';
import 'package:vmembershipofficial/services/auth_service.dart';

class RegisterPage extends StatefulWidget {
  static final String id = 'register';

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

class _RegisterPageState extends State<RegisterPage> {
  final _formKey = GlobalKey<FormState>();
  String _name, _email, _password;

  _submit() {
    if (_formKey.currentState.validate()) {
      _formKey.currentState.save();
      AuthService.signUpUser(context, _name, _email, _password); //
    }
  }

  @override
  Widget build(BuildContext context) {
    return SafeArea(
      child: Scaffold(
        backgroundColor: Color(0xff0D192A),
        body: Container(
          child: ListView(
            children: <Widget>[
              Column(
                children: <Widget>[
                  Padding(
                    padding: EdgeInsets.all(20.0),
                    child: Container(
                      width: 120,
                      height: 120,
                      margin: EdgeInsets.fromLTRB(0, 50, 0, 0),
                      child: Image(
                        image: AssetImage("assets/images/vlogo.png"),
                      ),
                    ),
                  ),
                  Padding(
                    padding: EdgeInsets.all(5.0),
                    child: Container(
                      margin: EdgeInsets.all(5.0),
                      child: Center(
                        child: Text("Register an Account",
                            style: TextStyle(
                                color: Colors.white,
                                fontWeight: FontWeight.bold,
                                fontSize: 20)),
                      ),
                    ),
                  ),
                  Form(
                    key: _formKey,
                    child: Column(
                      children: <Widget>[
                        SizedBox(height: 20.0),
                        Padding(
                          padding: EdgeInsets.fromLTRB(20, 0, 0, 0),
                          child: Column(
                            children: <Widget>[
                              Row(
                                children: <Widget>[
                                  Text("Email Address",
                                      style: TextStyle(
                                          fontSize: 10.0,
                                          color: Color(0xFFD3B875),),),
                                ],
                              ),
                            ],
                          ),
                        ),
                        SizedBox(height: 10.0),
                        Container(
                            margin: EdgeInsets.fromLTRB(20, 0, 20, 0),
                            padding: EdgeInsets.all(1.0),
                            decoration: BoxDecoration(
                              color: Color(0xFFD3B875),
                              borderRadius: BorderRadius.circular(10),
                            ),
                            child: Center(
                              child: Padding(
                                padding: EdgeInsets.fromLTRB(20, 0, 0, 0),
                                child: TextFormField(
                                  decoration: InputDecoration(
                                    border: InputBorder.none,
                                    labelText: "Email Address",
                                    labelStyle:
                                        TextStyle(color: Colors.black),
                                  ),
                                  validator: (input) => !input.contains("@")
                                      ? 'Please enter a valid email'
                                      : null,
                                  onSaved: (input) => _email = input,
                                ),
                              ),
                            )),
                        SizedBox(height: 20.0),
                        Padding(
                          padding: EdgeInsets.fromLTRB(20, 0, 0, 0),
                          child: Column(
                            children: <Widget>[
                              Row(
                                children: <Widget>[
                                  Text("Choose Password",
                                      style: TextStyle(
                                          fontSize: 10.0,
                                          color: Color(0xFFD3B875),),),
                                ],
                              ),
                            ],
                          ),
                        ),
                        SizedBox(height: 10.0),
                        Container(
                            margin: EdgeInsets.fromLTRB(20, 0, 20, 0),
                            padding: EdgeInsets.all(1.0),
                            decoration: BoxDecoration(
                              color: Color(0xFFD3B875),
                              borderRadius: BorderRadius.circular(10),
                            ),
                            child: Center(
                              child: Padding(
                                padding: EdgeInsets.fromLTRB(20, 0, 0, 0),
                                child: TextFormField(
                                  decoration: InputDecoration(
                                    border: InputBorder.none,
                                    labelText: "Password",
                                    labelStyle:
                                        TextStyle(color: Colors.black),
                                  ),
                                  validator: (input) => input.length < 8
                                      ? 'Must be at least 8 characters'
                                      : null,
                                  onSaved: (input) => _password = input,
                                  obscureText: true,
                                ),
                              ),
                            )),
                        SizedBox(height: 20.0),
                        Padding(
                          padding: EdgeInsets.fromLTRB(20, 0, 0, 0),
                          child: Column(
                            children: <Widget>[
                              Row(
                                children: <Widget>[
                                  Text("Choose a Name",
                                      style: TextStyle(
                                          fontSize: 10.0,
                                          color: Color(0xFFD3B875),),),
                                ],
                              ),
                            ],
                          ),
                        ),
                        SizedBox(height: 10.0),
                        Container(
                            margin: EdgeInsets.fromLTRB(20, 0, 20, 0),
                            padding: EdgeInsets.all(1.0),
                            decoration: BoxDecoration(
                              color: Color(0xFFD3B875),
                              borderRadius: BorderRadius.circular(10),
                            ),
                            child: Center(
                              child: Padding(
                                padding: EdgeInsets.fromLTRB(20, 0, 0, 0),
                                child: TextFormField(
                                  decoration: InputDecoration(
                                    border: InputBorder.none,
                                    labelText: "Name",
                                    labelStyle:
                                        TextStyle(color: Colors.black),
                                  ),
                                  validator: (input) => input.trim().isEmpty
                                      ? 'Enter a valid name'
                                      : null,
                                  onSaved: (input) => _name = input,
                                ),
                              ),
                            )),
                        SizedBox(height: 50),
                        Container(
                          width: 250.0,
                          child: FlatButton(
                            onPressed: _submit,
                            color: Colors.blue,
                            padding: EdgeInsets.all(10.0),
                            child: Text(
                              'Sign Up',
                              style: TextStyle(
                                color: Colors.white,
                                fontSize: 18.0,
                              ),
                            ),
                          ),
                        ),
                        SizedBox(height: 40),
                        Container(
                          height: 20,
                          child: Row(
                            mainAxisAlignment: MainAxisAlignment.center,
                            children: <Widget>[
                              Text(
                                "Already have an account?",
                                style: TextStyle(
                                    color: Colors.white, fontSize: 12.0),
                              ),
                              SizedBox(width: 12.0),
                              InkWell(
                                onTap: () {
                                  setState(() {
                                    Navigator.pop(
                                        context,
                                        MaterialPageRoute(
                                            builder: (context) =>
                                                RegisterPage()));
                                  });
                                },
                                child: Text(
                                  "Login Here",
                                  style: TextStyle(
                                      color: Color.fromRGBO(211, 184, 117, 100),
                                      fontSize: 12.0),
                                ),
                              )
                            ],
                          ),
                        ),
                      ],
                    ),
                  ),
                ],
              )
            ],
          ),
        ),
      ),
    );
  }
}

登录屏幕

​

热重加载错误--无论我是否更改了，都会发生这种错误

​

Answer 1

我在飞镖上运行你的登录屏幕代码，这就是我得到的

您持有电子邮件TextField的容器占用了屏幕宽度和高度的50%。

​

​

我建议你把

 width: MediaQuery.of(context).size.width * 0.5,
                height: MediaQuery.of(context).size.height * 0.5,

从你的容器里。