[Flutter] 코딩셰프 순한맛 19 - Builder Widget 없이 스낵바 구현, 토스트 메세지 구현하기

Builder Widget 없이 스낵바 만들기

• 강의에서는 RaisedButton으로 구현했지만 deprecated 됨
• ElevatedButton으로 대체 구현함

Builder Widge 없이 snack bar

 

main.dart

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: 'AppBar',
      theme: ThemeData(primarySwatch: Colors.red),
      home: const MyPage(),
    );
  }
}

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

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text(
          'Snack Bar',
          style: TextStyle(color: Colors.white),
        ),
        centerTitle: true,
        backgroundColor: Colors.red,
      ),
      body: MySnackBar(),
    );
  }
}

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

  @override
  Widget build(BuildContext context) {
    return Center(
      child: ElevatedButton(
          onPressed: () {
            ScaffoldMessenger.of(context)
                .showSnackBar(const SnackBar(
              content: Text('Hello',
                textAlign: TextAlign.center,
                style: TextStyle(
                    color: Colors.white),
              ),
              backgroundColor: Colors.teal,
              duration: Duration(milliseconds: 1000),
            ),
            );
          },
          child: Text('Show me')),
    );
  }
}

 

 

토스트 메세지 구현하기

토스트 메시지 구현

 

main.dart

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

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

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

  @override
  Widget build(BuildContext context) {
    return const MaterialApp(
      title: 'Toast',
      home: MyPage(),
    );
  }
}

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

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Toast message'),
        centerTitle: true,
      ),
      body: Center(
        child: TextButton(
          onPressed: () {
            flutterToast();
          },
          style: TextButton.styleFrom(backgroundColor: Colors.blue),
          child: const Text(
            'Toast',
            style: TextStyle(color: Colors.amber, fontSize: 30.0),
          ),
        ),
      ),
    );
  }
}

void flutterToast() {
  Fluttertoast.showToast(
      msg: "Flutter",
      gravity: ToastGravity.BOTTOM,
      backgroundColor: Colors.redAccent,
      fontSize: 20.0,
      textColor: Colors.white,
      toastLength: Toast.LENGTH_SHORT);
}

 

pubspec.yaml

name: flutter_practice
description: "A new Flutter project."
# The following line prevents the package from being accidentally published to
# pub.dev using `flutter pub publish`. This is preferred for private packages.
publish_to: 'none' # Remove this line if you wish to publish to pub.dev

# The following defines the version and build number for your application.
# A version number is three numbers separated by dots, like 1.2.43
# followed by an optional build number separated by a +.
# Both the version and the builder number may be overridden in flutter
# build by specifying --build-name and --build-number, respectively.
# In Android, build-name is used as versionName while build-number used as versionCode.
# Read more about Android versioning at https://developer.android.com/studio/publish/versioning
# In iOS, build-name is used as CFBundleShortVersionString while build-number is used as CFBundleVersion.
# Read more about iOS versioning at
# https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
# In Windows, build-name is used as the major, minor, and patch parts
# of the product and file versions while build-number is used as the build suffix.
version: 1.0.0+1

environment:
  sdk: ^3.5.1

# Dependencies specify other packages that your package needs in order to work.
# To automatically upgrade your package dependencies to the latest versions
# consider running `flutter pub upgrade --major-versions`. Alternatively,
# dependencies can be manually updated by changing the version numbers below to
# the latest version available on pub.dev. To see which dependencies have newer
# versions available, run `flutter pub outdated`.
dependencies:
  http: ^1.2.2
  flutter:
    sdk: flutter

  # The following adds the Cupertino Icons font to your application.
  # Use with the CupertinoIcons class for iOS style icons.
  cupertino_icons: ^1.0.8
  fluttertoast: ^8.2.8

dev_dependencies:
  flutter_test:
    sdk: flutter

  # The "flutter_lints" package below contains a set of recommended lints to
  # encourage good coding practices. The lint set provided by the package is
  # activated in the `analysis_options.yaml` file located at the root of your
  # package. See that file for information about deactivating specific lint
  # rules and activating additional ones.
  flutter_lints: ^4.0.0

# For information on the generic Dart part of this file, see the
# following page: https://dart.dev/tools/pub/pubspec

# The following section is specific to Flutter packages.
flutter:

  # The following line ensures that the Material Icons font is
  # included with your application, so that you can use the icons in
  # the material Icons class.
  uses-material-design: true

  # To add assets to your application, add an assets section, like this:
  assets:
   - assets/mario.jpg
   - assets/sonic.jpg

  # An image asset can refer to one or more resolution-specific "variants", see
  # https://flutter.dev/to/resolution-aware-images

  # For details regarding adding assets from package dependencies, see
  # https://flutter.dev/to/asset-from-package

  # To add custom fonts to your application, add a fonts section here,
  # in this "flutter" section. Each entry in this list should have a
  # "family" key with the font family name, and a "fonts" key with a
  # list giving the asset and other descriptors for the font. For
  # example:
  # fonts:
  #   - family: Schyler
  #     fonts:
  #       - asset: fonts/Schyler-Regular.ttf
  #       - asset: fonts/Schyler-Italic.ttf
  #         style: italic
  #   - family: Trajan Pro
  #     fonts:
  #       - asset: fonts/TrajanPro.ttf
  #       - asset: fonts/TrajanPro_Bold.ttf
  #         weight: 700
  #
  # For details regarding fonts from package dependencies,
  # see https://flutter.dev/to/font-from-package

 

이슈

• pubspec.yaml 파일에 fluttertoast 를 추가하고 typo 에러가 발생 후 main.dart 파일에 fluttertoast 가 import 되지 않는 현상

해결

• https://power-of-optimism.tistory.com/1075#google_vignette

 

---

출처

https://youtu.be/7E8l9ggxz-Q?si=TWIgD9UxKg_ySPEV