小编Dr.*_*hug的帖子

我真的很困惑如何让集团发出初始状态。bloc.state 发出最新状态。由于新的 bloc 库中没有可用的 @overrideinitialState，initialState 被传递给超级构造函数。但 bloc 仍然不会发出初始状态，在本例中是 Empty()。

number_trivia_bloc.dart

import 'package:clean_architecture/core/error/failure.dart';
import 'package:clean_architecture/core/utils/input_converter.dart';
import 'package:clean_architecture/features/number_trivia/domain/usecases/get_concrete_number_trivia_repository.dart';
import 'package:clean_architecture/features/number_trivia/domain/usecases/get_random_number_trivia.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'number_trivia_state.dart';
import 'number_trivia_event.dart';

const SERVER_FAILURE = 'Server failure';
const CACHE_FAILURE = 'Cache failure';
const INVALID_INPUT_FAILURE =
    'Invalid Input Failure - The input should not be a negative integer or zero';

class NumberTriviaBloc extends Bloc<NumberTriviaEvent, NumberTriviaState> {
  final GetConcreteNumberTrivia getConcreteNumberTrivia;
  final GetRandomNumberTrivia getRandomNumberTrivia;
  final InputConverter inputConverter;

  NumberTriviaBloc({
    // Changed the name of the constructor parameter (cannot use 'this.') …