ToggleButtons 一组切换按钮

Flutter 通过ToggleButtons实现一组切换按钮。

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(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({Key? key}) : super(key: key);

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

class _MyHomePageState extends State<MyHomePage> {
  List<bool> _selections = List.generate(3, (index) => false);
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Container(
        height: 200,
        width: 300,
        child: Center(
          child: ToggleButtons(
            children: [
              Icon(Icons.cake),
              Icon(Icons.fastfood),
              Icon(Icons.local_cafe),
            ],
            isSelected: _selections,
            onPressed: (index) {
              setState(() {
                _selections[index] = !_selections[index];
              });
            },
            color: Colors.green,
            selectedColor: Colors.orange,
            fillColor: Colors.red,
          ),
        ),
      ),
    );
  }
}