1

lib/main.dart

 import 'package:flutter/material.dart';
 import 'package:flutter/material.dart';
 
 
-void main() {
+main() {
   runApp(const MyApp());
   runApp(const MyApp());
 }
 }
 
 
 class MyApp extends StatelessWidget {
 class MyApp extends StatelessWidget {
   const MyApp({Key? key}) : super(key: key);
   const MyApp({Key? key}) : super(key: key);
 
 
-  // This widget is the root of your application.
   @override
   @override
   Widget build(BuildContext context) {
   Widget build(BuildContext context) {
-    return MaterialApp(
-      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.red,
-      ),
-      home: const MyHomePage(title: '我的訂單'),
-    );
-  }
-}
-
-class MyHomePage extends StatefulWidget {
-  const MyHomePage({Key? key, required 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
-  State<MyHomePage> createState() => _MyHomePageState();
-}
-
-class _MyHomePageState extends State<MyHomePage> {
-  List tabs = ["全部", "待付款", "點評/投票"];
-  @override
-  Widget build(BuildContext context) {
-    return new DefaultTabController(
-      length: tabs.length,
-      child: new Scaffold(
-      appBar: AppBar(
-        ... //省略无关代码
-        bottom: TabBar(   //生成Tab菜单
-          tabs: tabs.map((e) => Tab(text: e)).toList()
-        ),
-      ),
-      ... //省略无关代码
-        body: new TabBarView(
-        children: tabs.map((e) { //分别创建对应的Tab页面
-           return Container(
-           alignment: Alignment.center,
-           child: Text(e, textScaleFactor: 5),
-         );
-       }).toList(),
-        ),
-      ),
-    );
+    return Container();
   }
   }
 }
 }