Flutter – Layout

중복된 요소

import 'package:flutter/material.dart';

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

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Route One'),
      ),
      body: Padding(
        padding: const EdgeInsets.symmetric(horizontal: 8.0),
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: [
            ElevatedButton(
              onPressed: () {
                 Navigator.of(context).push(
                   MaterialPageRoute(
                     builder: (BuildContext context) => RouteOneScreen(),
                   ),
                );              
              },
              child: Text('Pop'),
            )
          ],
        ),
      ),
    );
  }
}

import 'package:flutter/material.dart';

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

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Route Two'),
      ),
      body: Padding(
        padding: const EdgeInsets.symmetric(horizontal: 8.0),
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: [
            ElevatedButton(
              onPressed: () {
                Navigator.of(context).pop();
              },
              child: Text('Pop'),
            )
          ],
        ),
      ),
    );
  }
}

위와 같이 중복될 경우, 중복되는 영역을 layout 화 시켜서 사용하자.

// lib/layout/main_layout.dart

import 'package:flutter/material.dart';

class MainLayout extends StatelessWidget {
  final String title; // 변경되어야 하는 부분을 변수로 받음
  final List<Widget> children; // 변경되어야 하는 부분을 변수로 받음

  const MainLayout({required this.title, required this.children, super.key});

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(title),
      ),
      body: Padding(
        padding: const EdgeInsets.symmetric(horizontal: 8.0),
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: children,
        ),
      ),
    );
  }
}