Flutter - 限制自组件大小

import 'package:flutter/material.dart';
import 'package:flutter/widgets.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      theme: ThemeData.light(),
      home: Scaffold(
          body: Center(
        child: ConstrainedBox(
          constraints: BoxConstraints(
            maxHeight: 200.0,  // 限制child最大高度为200
            maxWidth: 100.0, // 限制child最大宽度为100
          ),
          child: Container(
            color: Colors.yellow,
          ),
        ),
      )),
    );
  }
}

效果图:

ConstrainedBox可以限制最大高宽度，最小高端度。