关于Bloc

[cuixm]

最近看了一些获取祖先元素的文档，获取Bloc的方法做了小改如下：

abstract class BlocBase {
  Future getData({String labelId, int page});

  Future onRefresh({String labelId});

  Future onLoadMore({String labelId});

  void dispose();
}
class BlocProvider<T extends BlocBase> extends StatefulWidget {
  BlocProvider({
    Key key,
    @required this.child,
    @required this.bloc,
    this.userDispose: true,
  }) : super(key: key);

  final T bloc;
  final Widget child;
  final bool userDispose;

  @override
  _BlocProviderState<T> createState() => _BlocProviderState<T>();

  /*static T of<T extends BlocBase>(BuildContext context) {
    final type = _typeOf<BlocProvider<T>>();
    BlocProvider<T> provider = context.ancestorWidgetOfExactType(type);
    return provider.bloc;
  }*/

  static T of<T extends BlocBase>(BuildContext context){
    final type = _typeOf<_BlocProviderInherited<T>>();
    _BlocProviderInherited<T> provider = context.ancestorInheritedElementForWidgetOfExactType(type)?.widget;
    return provider?.bloc;
  }
  static Type _typeOf<T>() => T;
}

class _BlocProviderInherited<T> extends InheritedWidget {
  _BlocProviderInherited({
    Key key,
    @required Widget child,
    @required this.bloc,
  }) : super(key: key, child: child);

  final T bloc;

  @override
  bool updateShouldNotify(_BlocProviderInherited oldWidget) => false;
}

class _BlocProviderState<T extends BlocBase> extends State<BlocProvider<BlocBase>> {
  @override
  void dispose() {
    if (widget.userDispose) widget.bloc.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return new _BlocProviderInherited<T>(
      bloc: widget.bloc,
      child: widget.child,
    );
  }
}

把原来的一级一级找的方法，改成Inherited模式，

[uddsoft]

项目的bloc看的不是很明白。方便出个简单的教程或者Demo吗。