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import UIKit

import CoreData

@UIApplicationMain

class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?

    func application(_ application: UIApplication,

                     didFinishLaunchingWithOptions

        launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {

        return true

    }

    func applicationWillResignActive(_ application: UIApplication) {

    }

    func applicationDidEnterBackground(_ application: UIApplication) {

    }

    func applicationWillEnterForeground(_ application: UIApplication) {

    }

    func applicationDidBecomeActive(_ application: UIApplication) {

    }

    func applicationWillTerminate(_ application: UIApplication) {

    }

    // MARK: - Core Data stack

    lazy var persistentContainer: NSPersistentContainer = {

        let container = NSPersistentContainer(name: "hangge_1841")

        container.loadPersistentStores(completionHandler: { (storeDescription, error) in

            if let error = error as NSError? {

                fatalError("Unresolved error \(error), \(error.userInfo)")

            }

        })

        return container

    }()

    // MARK: - Core Data Saving support

    func saveContext () {

        let context = persistentContainer.viewContext

        if context.hasChanges {

            do {

                try context.save()

            } catch {

                let nserror = error as NSError

                fatalError("Unresolved error \(nserror), \(nserror.userInfo)")

            }

        }

    }

}