SimpleCoreDataStackSinceiOS10.swift

//
//  CoreDataStack.swift
//  CoreDataShowcase
//
//  Created by Barbara Rodeker on 31.10.17.
//
//  THIS CLASS CONTAINS ALL THE REQUIRED PROPERTIES THAT NEED TO BE CREATED
//  FOR CORE DATA AFTER NSPersistentContainer was added in IOS 10
//
// SWIFT 4

import Foundation
import CoreData

class CoreDataStack: NSObject {
    
    private static let modelName = "YOURMODELNAME"
    static var shared = CoreDataStack()
    
    private(set) lazy var container: NSPersistentContainer = {
        
        let description = NSPersistentStoreDescription()
        description.type = NSSQLiteStoreType
        description.shouldInferMappingModelAutomatically = true
        description.shouldMigrateStoreAutomatically = true
        
        let container = NSPersistentContainer(name: CoreDataStack.modelName)
        container.persistentStoreDescriptions = [description]
        
        container.loadPersistentStores(completionHandler: { (storeDescription, error) in
            if let error = error as NSError? {
                fatalError("Unresolved error \(error), \(error.userInfo)")
            }
        })
        return container
    }()

    // MARK: -  Saving
    
    func save() {
        let context = container.viewContext
        if context.hasChanges {
            do {
                try context.save()
            } catch {
                let nserror = error as NSError
                fatalError("Unresolved error \(nserror), \(nserror.userInfo)")
            }
        }
    }
    
    
}