Flutter – SnackBar

import 'package:flutter/material.dart';

void main() => runApp(const SnackBarDemo());

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'SnackBar Demo',
      home: Scaffold(
        appBar: AppBar(
          title: const Text('SnackBar Demo'),
        ),
        body: const SnackBarPage(),
      ),
    );
  }
}

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

  @override
  Widget build(BuildContext context) {
    return Center(
      child: ElevatedButton(
        onPressed: () {
          final snackBar = SnackBar(
            content: Text('Yay! A Snack Bar!'),
          );
          ScaffoldMessenger.of(context).showSnackBar(snackBar);
        },
        child: const Text('Show SnackBar'),
      ),
    );
  }
}

SnackBarAction 추가하기

onPressed: () {
  final snackBar = SnackBar(
    content: Text('Yay! A Snack Bar!'),
    action: SnackBarAction(
      label: 'Close',
      onPressed: () {
        ScaffoldMessenger.of(context).hideCurrentSnackBar();
      },
    ),
  );
  ScaffoldMessenger.of(context).showSnackBar(snackBar);
},