flutter - 信息 : 'runZoned' is deprecated and shouldn't be used. 这将在 v9.0.0 中删除。使用 Bloc.Bloc.transformer 代替

Question

我在尝试在 DartPad 上运行我的代码时遇到了这个问题。

'runZoned' is deprecated and shouldn't be used. This will be removed in v9.0.0. Use Bloc.Bloc.transformer instead...

正确的替换方法是什么？

代码:

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

void main() {
  BlocOverrides.runZoned(
    () => runApp(const App()),
    blocObserver: AppBlocObserver(),
  );
}

/// Custom [BlocObserver] that observes all bloc and cubit state changes.
class AppBlocObserver extends BlocObserver {
  @override
  void onChange(BlocBase bloc, Change change) {
    super.onChange(bloc, change);
    if (bloc is Cubit) print(change);
  }

  @override
  void onTransition(Bloc bloc, Transition transition) {
    super.onTransition(bloc, transition);
    print(transition);
  }
}

Answer 1

解决方案是:

void main() {
  Bloc.observer = AppBlocObserver();
  runApp(const App());
}