Flutter -带图像的TabBar

flutter create tabbar_with_images
cd tabbar_with_images

flutter:
  assets:
    - assets/images/tab1.png
    - assets/images/tab2.png
    - assets/images/tab3.png

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'TabBar with Images',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> with SingleTickerProviderStateMixin {
  late TabController _tabController;

  @override
  void initState() {
    super.initState();
    _tabController = TabController(length: 3, vsync: this);
  }

  @override
  void dispose() {
    _tabController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('TabBar with Images'),
        bottom: TabBar(
          controller: _tabController,
          tabs: [
            Tab(icon: Image.asset('assets/images/tab1.png', height: 30)),
            Tab(icon: Image.asset('assets/images/tab2.png', height: 30)),
            Tab(icon: Image.asset('assets/images/tab3.png', height: 30)),
          ],
        ),
      ),
      body: TabBarView(
        controller: _tabController,
        children: [
          Center(child: Text('Tab 1 Content')),
          Center(child: Text('Tab 2 Content')),
          Center(child: Text('Tab 3 Content')),
        ],
      ),
    );
  }
}

flutter run