DrawerController的iOS狀態恢復問題

Question

我有一個使用Xcode 8.3.3在Swift 3.1中編寫的應用程序。

我目前正在嘗試實施國家保護/恢復。

為此，我在AppDelegate.swift實現了shouldSaveApplicationState和willFinishLaunchingWithOptions方法，並設置為返回true ：

// AppDelegate.swift
// STATE RESTORATION CALLBACKS

func application(_ application: UIApplication, shouldSaveApplicationState coder: NSCoder) -> Bool {
    debug_print(this: "shouldSaveApplicationState")
    return true
}
func application(_ application: UIApplication, shouldRestoreApplicationState coder: NSCoder) -> Bool {
    debug_print(this: "shouldRestoreApplicationState")
    restoringState = true
    return true
}

func application(application: UIApplication, willFinishLaunchingWithOptions launchOptions: [NSObject : AnyObject]?) -> Bool {
    debug_print(this: "willFinishLaunchingWithOptions")
    return true
}

我還為所有相關的viewcontrollers和navigationcontrollers提供了恢復ID。

我正在使用第三方庫來處理側抽屜導航容器（ https://github.com/sascha/DrawerController ）。 初始viewcontroller是在didFinishLaunchingWithOptions方法中以編程方式設置的，見下文。

// AppDelegate.swift
var centerContainer: DrawerController?

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {

    let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
    let centerViewController =   mainStoryboard.instantiateViewController(withIdentifier: "RootViewControllerNav") as! UINavigationController 
    let leftViewController = mainStoryboard.instantiateViewController(withIdentifier: "SideDrawerViewController") as! UITableViewController

    centerContainer = DrawerController(centerViewController: centerViewController, leftDrawerViewController: leftViewController)

    centerContainer?.restorationIdentifier = "DrawerControllerView"
    window = UIWindow(frame: UIScreen.main.bounds)
    window?.restorationIdentifier = "MainWindow"
    window?.rootViewController = centerContainer
    window?.makeKeyAndVisible()

    return true
}

當應用程序打開並嘗試恢復狀態時，它會暫時顯示正確的viewcontroller（應用程序關閉前的最后一個控制器），然后一旦應用程序變為活動狀態，它將恢復為初始viewcontroller。

例如，發生以下情況：

1. 打開應用程序通過側面菜單導航到“設置”視圖
2. 導航到主屏幕
3. 停止運行xcode並重新啟動它
4. 應用程序將打開顯示設置視圖，然后恢復為主視圖

任何人都可以告訴我是什么導致了這個，或者我哪里出錯了？ 如果您需要更多代碼示例，請與我們聯系。

Answer 1

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
        // Override point for customization after application launch.

        let mainStoryboard: UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
        let leftSideDrawerViewController = mainStoryboard.instantiateViewController(withIdentifier: "SideDrawerViewController") as! UITableViewController
        let centerViewController = mainStoryboard.instantiateViewController(withIdentifier: "RootViewControllerNav") as! UINavigationController
        let navigationController = UINavigationController(rootViewController: centerViewController)
        navigationController.restorationIdentifier = "navigationControllerKey"
        let leftSideNavController = UINavigationController(rootViewController: leftSideDrawerViewController)
        leftSideNavController.restorationIdentifier = "LeftNavigationController"
        self.drawerController = DrawerController(centerViewController: navigationController, leftDrawerViewController: leftSideNavController, rightDrawerViewController: nil)
        self.drawerController.openDrawerGestureModeMask = .all
        self.drawerController.closeDrawerGestureModeMask = .all
        self.window = UIWindow(frame: UIScreen.main.bounds)
        self.window?.rootViewController = self.drawerController
        return true
    }