ReSwift中間件加載初始狀態

Question

如何使用ReSwift從數據庫加載初始應用程序狀態？

我在想什麼時候應用程序狀態首次被初始化，即第一次調用reducer時，就像一箇中間件。

Answer 1

例如，在AppDelegate中

var store = Store<AppState>(reducer: AppReducer(), state: nil) 

在AppReducer

func handleAction(action: Action, state: AppState?) -> AppState { 
    return AppState(
     dbState: DBReducer(state: state?.dbState, action: action) 
     //other states 
    ) 
} 

在DBReducer

func DBReducer(state: DBState?, action: Action) -> dbState { 
    var state = state ?? DBState() 
    //actions state change 
} 

在初始化DBState從數據庫