Created
February 23, 2024 03:45
-
-
Save Nunocky/262b89dcd3e249351bb930df50a28406 to your computer and use it in GitHub Desktop.
AsyncNotifierの使い方
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
const sentenceList = { | |
'Your code transforms ideas into reality.', | |
'Each bug you fix makes you a stronger developer.', | |
'Your dedication to learning is inspiring.', | |
'You turn complex problems into elegant solutions.', | |
'Your creativity in app design is remarkable.', | |
'Every line of code you write is a step towards mastery.', | |
'You have a unique talent for making the complex understandable.', | |
'Your commitment to quality is evident in your work.', | |
'You\'re not just coding; you\'re crafting future technologies.', | |
'Your passion for development lights up the path for others.', | |
}; | |
class MessageNotifier extends AsyncNotifier<String> { | |
@override | |
String build() => ''; | |
Future<void> refresh() async { | |
final _ = await future; | |
state = const AsyncValue.loading(); | |
await Future.delayed(const Duration(seconds: 1)); | |
final index = Random().nextInt(sentenceList.length); | |
state = AsyncValue.data(sentenceList.elementAt(index)); | |
} | |
} | |
final _messageProvider = AsyncNotifierProvider<MessageNotifier, String>(() { | |
return MessageNotifier(); | |
}); |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
@override | |
Widget build(BuildContext context, WidgetRef ref) { | |
final message = ref.watch(_messageProvider); | |
... | |
message.when( | |
data: (String text) { | |
return Text(text); | |
}, | |
error: (Object error, StackTrace stackTrace) { | |
return Container(); | |
}, | |
loading: () { | |
return const CircularProgressIndicator(); | |
}, | |
), |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment