Flutter：一个关于SliverFillRemaining的页面布局

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
        useMaterial3: true,
      ),
      home: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
        title: Text(widget.title),
      ),
      body: SafeArea(
        child: SizedBox(
          width: double.infinity,
          child: CustomScrollView(
            slivers: [
              const SliverToBoxAdapter(
                child: Column(
                  children: [
                    FlutterLogo(size: 150),
                    FlutterLogo(size: 150),
                    FlutterLogo(size: 150),
                  ],
                ),
              ),
              SliverFillRemaining(
                hasScrollBody: false, // 禁止滚动
                child: Align(
                  alignment: Alignment.bottomCenter,
                  child: FilledButton(
                    onPressed: () {},
                    child: const Text("点击"),
                  ),
                ),
              )
            ],
          ),
        ),
      ),
    );
  }
}