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Widget build(BuildContext context) {
    return Scaffold(
      body: Stepper(
        steps: buildStep(),...

List<Step> buildStep() {
_steps = <Step>[
  Step(
    isActive: true,title: Text('Enter your name'),content: TextField(
      controller: _name,decoration: InputDecoration(labelText: 'Enter your Name'),),Step(
    isActive: true,title: Text('Enter your age'),content: TextField(
      keyboardType: TextInputType.number,controller: _age,decoration: InputDecoration(
        labelText: 'Enter your Age',title: Text('Step 3'),content: Column(
      children: <Widget>[
        Text('You have entered: '),Text('Your name is : ${_nameDisplay}'),Text('Your age is : ${_ageDisplay}'),],)
];

return _steps;
}

工作演示

完整代码

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',theme: ThemeData(
        // This is the theme of your application.
        //
        // Try running your application with "flutter run". You'll see the
        // application has a blue toolbar. Then,without quitting the app,try
        // changing the primarySwatch below to Colors.green and then invoke
        // "hot reload" (press "r" in the console where you ran "flutter run",// or simply save your changes to "hot reload" in a Flutter IDE).
        // Notice that the counter didn't reset back to zero; the application
        // is not restarted.
        primarySwatch: Colors.blue,home: StoreManagement(),);
  }
}

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

  // This widget is the home page of your application. It is stateful,meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  final String title;

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

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

  void _incrementCounter() {
    setState(() {
      // This call to setState tells the Flutter framework that something has
      // changed in this State,which causes it to rerun the build method below
      // so that the display can reflect the updated values. If we changed
      // _counter without calling setState(),then the build method would not be
      // called again,and so nothing would appear to happen.
      _counter++;
    });
  }

  @override
  Widget build(BuildContext context) {
    // This method is rerun every time setState is called,for instance as done
    // by the _incrementCounter method above.
    //
    // The Flutter framework has been optimized to make rerunning build methods
    // fast,so that you can just rebuild anything that needs updating rather
    // than having to individually change instances of widgets.
    return Scaffold(
      appBar: AppBar(
        // Here we take the value from the MyHomePage object that was created by
        // the App.build method,and use it to set our appbar title.
        title: Text(widget.title),body: Center(
        // Center is a layout widget. It takes a single child and positions it
        // in the middle of the parent.
        child: Column(
          // Column is also a layout widget. It takes a list of children and
          // arranges them vertically. By default,it sizes itself to fit its
          // children horizontally,and tries to be as tall as its parent.
          //
          // Invoke "debug painting" (press "p" in the console,choose the
          // "Toggle Debug Paint" action from the Flutter Inspector in Android
          // Studio,or the "Toggle Debug Paint" command in Visual Studio Code)
          // to see the wireframe for each widget.
          //
          // Column has various properties to control how it sizes itself and
          // how it positions its children. Here we use mainAxisAlignment to
          // center the children vertically; the main axis here is the vertical
          // axis because Columns are vertical (the cross axis would be
          // horizontal).
          mainAxisAlignment: MainAxisAlignment.center,children: <Widget>[
            Text(
              'You have pushed the button this many times:',Text(
              '$_counter',style: Theme.of(context).textTheme.display1,floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,tooltip: 'Increment',child: Icon(Icons.add),// This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}


class StoreManagement extends StatefulWidget {
  static const String pageId = 'StoreManagement';
  @override
  _StoreManagementState createState() => _StoreManagementState();
}

class _StoreManagementState extends State<StoreManagement> {
  List<Step> _steps;
  int _current;
  TextEditingController _name;
  TextEditingController _age;
  String _nameDisplay;
  String _ageDisplay;

  void _stepContinue() {
    setState(() {
      _current++;
      if (_current >= _steps.length) _current = _steps.length - 1;
      print('current ${_current}');
      if (_current == 2) {
        _ageDisplay = _age.text;
        print('_ageDisplay ${_ageDisplay}');
        _nameDisplay = _name.text;
        print('_nameDisplay ${_nameDisplay}');
      }
    });
  }

  void _stepCancel() {
    setState(() {
      _current--;
      if (_current < 0) _current = 0;
    });
  }

  void _stepTap(int index) {
    setState(() {
      _current = index;
    });
  }

  @override
  void initState() {
    _name = TextEditingController();
    _age = TextEditingController();
    _current = 0;

    super.initState();
  }

  List<Step> buildStep() {
    _steps = <Step>[
      Step(
        isActive: true,content: TextField(
          controller: _name,Step(
        isActive: true,content: TextField(
          keyboardType: TextInputType.number,decoration: InputDecoration(
            labelText: 'Enter your Age',content: Column(
          children: <Widget>[
            Text('You have entered: '),)
    ];

    return _steps;
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Stepper(
        steps: buildStep(),currentStep: _current,type: StepperType.vertical,onStepCancel: _stepCancel,onStepContinue: _stepContinue,onStepTapped: _stepTap,);
  }
}