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- // MARK: - Core Data stack
- lazy var persistentContainer: NSPersistentContainer = {
- /*
- The persistent container for the application. This implementation
- creates and returns a container, having loaded the store for the
- application to it. This property is optional since there are legitimate
- error conditions that could cause the creation of the store to fail.
- */
- let container = NSPersistentContainer(name: "coreDataTestForPreOS")
- container.loadPersistentStores(completionHandler: { (storeDescription, error) in
- if let error = error as NSError? {
- // Replace this implementation with code to handle the error appropriately.
- // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
- /*
- Typical reasons for an error here include:
- * The parent directory does not exist, cannot be created, or disallows writing.
- * The persistent store is not accessible, due to permissions or data protection when the device is locked.
- * The device is out of space.
- * The store could not be migrated to the current model version.
- Check the error message to determine what the actual problem was.
- */
- 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 {
- // Replace this implementation with code to handle the error appropriately.
- // fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
- let nserror = error as NSError
- fatalError("Unresolved error (nserror), (nserror.userInfo)")
- }
- }
- }
- }
- let ad = UIApplication.shared.delegate as! AppDelegate
- let context = ad.persistentContainer.viewContext
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