Flexible 设置每个组件所占的空间比例

Flexible 设置每个控制所占的空间比例

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 StatelessWidget {
  const MyHomePage({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("Flexible Demo"),
      ),
      body: Container(
        child: Center(
          child: Column(
            children: [
              Flexible(
                flex: 2,
                fit: FlexFit.loose,
                child: Container(
                  //height: 100,
                  color: Colors.cyan,
                ),
              ),
              Flexible(
                flex: 3,
                child: Container(
                  //height: 100,
                  color: Colors.indigo,
                ),
              ),
              Flexible(
                flex: 1,
                child: Container(
                  // height: 100,
                  color: Colors.teal,
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }
}