andrehsouza

import UIKit
import CoreData

//MARK: - Core Data stack
class CoreDataStack: NSObject {
    
    static let sharedInstance = CoreDataStack()
    static let containerName = "CoreDataExample" //CoreDataExample.xcdatamodeld
    
    private override init() {}

andrehsouza

if let appDelegate = UIApplication.shared.delegate as? AppDelegate {
    let managedContext = appDelegate.persistentContainer.viewContext
    if let customer: Customer = NSEntityDescription.insertNewObject(forEntityName: "Customer", into: managedContext) as? Customer {
         customer.name = "Mike"
        //stuff
    }
}

andrehsouza

import Foundation

protocol DescribeProtocol: class { }

extension DescribeProtocol where Self: NSObject {
    static var objectName: String {
        return String(describing: self)
    }
}

andrehsouza

import Foundation
import CoreData

protocol FetchableProtocol: class {
    associatedtype FetchableType: NSManagedObject = Self
}

extension FetchableProtocol where Self : NSManagedObject, FetchableType == Self {
    
    static func fetchAll() -> [FetchableType] {

andrehsouza

import Foundation
import CoreData

@objc(Customer)
class Customer: CustomNSManagedObject, FetchableProtocol { 
    
    @NSManaged var name: String
    @NSManaged var email: String
    @NSManaged var password: String
    

andrehsouza

let customer = Customer()
customer.name = "Mike"
customer.email = "mike@gmail.com"
customer.password = "mike123"

andrehsouza

let customerList = Customer.fetchAll()

andrehsouza

lazy var persistentContainer: NSPersistentContainer = {
        let container = NSPersistentContainer(name: "CoreDataExample")
        container.loadPersistentStores(completionHandler: { (storeDescription, error) in
            if let error = error as NSError? {
                fatalError("Unresolved error \(error), \(error.userInfo)")
            }
        })
        return container
    }()

andrehsouza

// UILabel
label.font = .preferredFont(forTextStyle: .headline)
label.adjustsFontForContentSizeCategory = true

// UIImageView
imageView.adjustsImageSizeForAccessibilityContentSizeCategory = true

andrehsouza

view.accessibilityIgnoresInvertColors = true