combineReducers拆分后不同的Reducers狀態(tài)不共享嗎？

當(dāng)我寫了ReducerA和ReducerB后，使用combineReducers

const rootReducer = combineReducers({
    ReducerA,
    ReducerB
});

export default rootReducer;

狀態(tài)就變成了

state:{
    ReducerA:...,
    ReducerB:...
}

相對應(yīng)的ActionA和ActionB也就只能通過對應(yīng)的Reducer更改對應(yīng)的state部分

ActionA → state:{ReducerA:...}

ActionB → state:{ReducerB:...}

應(yīng)該是這樣的嗎？有辦法通過ActionB去影響state:{ReducerA:...}的內(nèi)容嗎？