底部溢出无限像素

Question

我已经为新的Messenger游戏的登录页面和注册页面编写了此代码。

https://github.com/wileecoyote2point0/math_game

在模拟器中，我收到错误消息：底部被无限像素溢出

谁能指导我正确的方向？

我尝试实现滚动视图，并尝试了MainAxisSize.Min

但似乎无法使其正常工作。

Answer 1

您已经使用了所有刚性容器，行和列。 与其使用固定大小的容器，不如使用固定大小的容器，以使其适合所需的大小。 在这里，您只需要简单地将Expanded Widget放在Container Widget之外。 工作应用程序的链接是工作应用程序映像

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

import 'signup.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
        theme: new ThemeData(primarySwatch: Colors.purple),
        home: new LoginPage(),
        routes: <String, WidgetBuilder>{
          '/signup': (BuildContext context) => new SignupPage()
        });
  }
}

class LoginPage extends StatefulWidget {
  @override
  State createState() => new LoginPageState();
}

class LoginPageState extends State<LoginPage>
    with SingleTickerProviderStateMixin {
  Animation<double> _iconAnimation;
  AnimationController _iconAnimationController;

  @override
  void initState() {
    super.initState();
    _iconAnimationController = AnimationController(
      vsync: this,
      duration: new Duration(milliseconds: 500),
    );
    _iconAnimation = new CurvedAnimation(
        parent: _iconAnimationController, curve: Curves.easeOut);
    _iconAnimation.addListener(() => this.setState(() {}));
    _iconAnimationController.forward();
  }

  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      backgroundColor: Colors.tealAccent,
      body: new Stack(
        fit: StackFit.expand,
        children: <Widget>\[
          new Image(
            image: new AssetImage("assets/nevroner3.jpg"),
            fit: BoxFit.cover,
            color: Colors.black87,
            colorBlendMode: BlendMode.darken,
          ),
          new Theme(
            data: new ThemeData(
              brightness: Brightness.dark,
              inputDecorationTheme: new InputDecorationTheme(
                labelStyle:
                    new TextStyle(color: Colors.tealAccent, fontSize: 20.0),
              ),
            ),
            isMaterialAppTheme: true,
            child: new Column(
              mainAxisAlignment: MainAxisAlignment.center,
              children: <Widget>\[
                new Image(
                  image: new AssetImage("assets/math_logo3.png"),
                ),
                Expanded(
                  child: new Container(
                    padding: EdgeInsets.all(20.0),
                    child: new Form(
                      autovalidate: true,
                      child: new Column(
                        mainAxisAlignment: MainAxisAlignment.start,
                        children: <Widget>\[
                          new TextFormField(
                            decoration: new InputDecoration(
                              labelText: "Enter Email",
                              fillColor: Colors.white,
                            ),
                            keyboardType: TextInputType.emailAddress,
                          ),
                          new TextFormField(
                            decoration: new InputDecoration(
                              labelText: "Enter Password",
                              fillColor: Colors.white,
                            ),
                            obscureText: true,
                            keyboardType: TextInputType.text,
                          ),
                          new Padding(
                            padding: const EdgeInsets.only(top: 20.0),
                          ),
                          new MaterialButton(
                              color: Colors.teal,
                              textColor: Colors.white,
                              child: new Text("Login"),
                              onPressed: () => {}),
                          SizedBox(height: 50.0),
                          Row(
                            mainAxisAlignment: MainAxisAlignment.center,
                            children: <Widget>\[
                              Text(
                                "New to Math Messenger ?",
                                style: TextStyle(
                                    color: Colors.grey,
                                    decoration: TextDecoration.underline),
                              )
                            \],
                          ),
                          SizedBox(height: 20.0),
                          InkWell(
                            onTap: () {
                              Navigator.of(context).pushNamed('/signup');
                            },
                          ),
                          Row(
                            mainAxisAlignment: MainAxisAlignment.center,
                            children: <Widget>\[
                              Text(
                                "Register",
                                style: TextStyle(
                                  color: Colors.tealAccent,
                                  decoration: TextDecoration.underline,
                                ),
                              ),
                            \],
                          ),
                        \],
                      ),
                    ),
                  ),
                )
              \],
            ),
          ),
        \],
      ),
    );
  }
}][1]