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June 21, 2025 05:02
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stream_controller_tutorial
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| import 'dart:async'; | |
| import 'package:flutter/material.dart'; | |
| void main() { | |
| var controller = StreamController<String>.broadcast(); | |
| var subscription01 = controller.stream; | |
| subscription01.listen( | |
| (data) { | |
| print('[01 Listen] onData - data: $data'); | |
| }, | |
| onDone: () { | |
| print('[01 Listen] onDone'); | |
| }, | |
| onError: (err) { | |
| print('[01 Listen] onError - err: $err'); | |
| }, | |
| cancelOnError: true, | |
| ); | |
| var subscription02 = controller.stream; | |
| subscription02.listen( | |
| (data) { | |
| print('[02 Listen] onData - data: $data'); | |
| }, | |
| onDone: () { | |
| print('[02 Listen] onDone'); | |
| }, | |
| onError: (err) { | |
| print('[02 Listen] onError - err: $err'); | |
| }, | |
| cancelOnError: true, | |
| ); | |
| print('controller.hasListener: ${controller.hasListener}'); | |
| controller.add("안녕하세요! 1"); | |
| controller.add("안녕하세요! 2"); | |
| controller.close(); | |
| controller.add("안녕하세요! 3"); | |
| // controller.addError('에러입니다.!'); | |
| controller.add("안녕하세요! 4"); | |
| controller.addStream(someDelayedWords()); | |
| // runApp(const MyApp()); | |
| } | |
| Stream<String> someDelayedWords() async* { | |
| await Future.delayed(Duration(seconds: 2)); | |
| yield '오늘도'; | |
| await Future.delayed(Duration(seconds: 2)); | |
| yield '빡코딩'; | |
| } |
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