flutter:将所有小部件排成一行

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(title: Text('Row Example')),
        body: Center(
          child: Row(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              RaisedButton(onPressed: () {}, child: Text('Button 1')),
              RaisedButton(onPressed: () {}, child: Text('Button 2')),
              RaisedButton(onPressed: () {}, child: Text('Button 3')),
            ],
          ),
        ),
      ),
    );
  }
}

Row(
  mainAxisAlignment: MainAxisAlignment.center,
  children: [
    RaisedButton(onPressed: () {}, child: Text('Button 1')),
    SizedBox(width: 10), // 添加空间
    RaisedButton(onPressed: () {}, child: Text('Button 2')),
    SizedBox(width: 10), // 添加空间
    RaisedButton(onPressed: () {}, child: Text('Button 3')),
  ],
)