假设我在blocprovidertree中有3个集团,这意味着这些集团可用于类。其中一个被用作bloclistener,现在我希望其他两个集团用作blocuilders,因为我需要在同一页面上构建两个群体。bloclistener接受孩子而不是孩子。请帮助!
Bloclistener接受孩子而不是孩子。请帮助!
BlocProviderTree(
blocProviders: [
BlocProvider<EvenBloc>(bloc: _evenBloc),
BlocProvider<SumBloc>(bloc: _sumsBloc,),
BlocProvider<SpacesBloc>(bloc: _spacesBloc,),
],
child: BlocListener(
bloc: _evenBloc,
listener: (BuildContext context, EvenState state) {
if (state is NowEven) {
_sumsBloc.dispatch(LoadSums());
}
},
child: BlocBuilder<SumsEvent,SumsState>(
bloc: _programsBloc,
builder: (BuildContext context, SumsState state) {
if (state is SumsEmpty)
return Container(height: 0.0, width: 0.0,);
if (state is SumsLoading)
return Evens(
child: SpinKitDoubleBounce(
color: darkIndigo,
size: 70.0,
),
);
else if (state is SumsLoaded)
return _body( context,state.sums);
},
)
)
),
如果项目数为偶数,我想要带有总和的间隔。我得到的总和正确,但是空间在其他集团中。如何定义两个blocbuilders?
您可以彼此嵌套BlocBuilder
s:
BlocBuilder(
bloc: BlocProvider.of<Foo>(context),
builder: (context, FooState fooState) {
return BlocBuilder(
bloc: BlocProvider.of<Bar>(context),
builder: (context, BarState barState) {
return Text('$fooState $barState');
},
);
},
);