如题，我在BottomNavigationBar调用了一个点击方法，代码如下
bottomNavigationBar: BottomNavigationBar( backgroundColor: Colors.white, unselectedItemColor: Colors.black54, elevation: 1, selectedItemColor: Colors.deepOrange, type: BottomNavigationBarType.fixed, onTap: (currentIndex) { dispatch(EntranceActionCreator.onChangeIndexAction(currentIndex)); },

Action:
static Action onChangeIndexAction(int index) { return Action(EntranceAction.changeIndexAction, payload: index); }

Effect:
void _onChangeIndexAction(Action action, Context<EntranceState> ctx) { println("buildEffect---changeIndex"); int selectedIndex = action.payload; ctx.state.mainPageController.jumpToPage(selectedIndex); }

Reducer:
EntranceState _onAction(EntranceState state, Action action) { final EntranceState newState = state.clone(); newState.selectedIndex = action.payload; return newState; }
打过断点，应该是没刷新，请问需要如何解决