Trying To Save My Item To CoreData FrameWork - swift

Question

I'm trying to use CoreData to save my favourites locally and I have a set that acts as storage so that they will be accessed when the program terminates but I am not sure how to make my object persistent to do that. This is what I tried to do.
import Foundation
import CoreData
class PersistenceService {
private init() {}
static var context: NSManagedObjectContext {
return persistentContainer.viewContext
}
// MARK: CoreData
static 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: "playerModel")
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
}()
static 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)")
}
}
}
}
This is the object I want to save
var item = CurrentPlayers(context: PersistenceService.context) //make it reference NSManagededContext so it can be saved
//this method adds to Favourites
#IBAction func addToFav(_ sender: Any) {
let alert = UIAlertController(title: "Favourite Added 💙", message: "\(name.text ?? "") is added to favourites", preferredStyle: .alert)
alert.addAction(UIAlertAction(
title: "OK",
style: UIAlertAction.Style.default)
{ [self] _ in
FavouriteManager.shared.add(item)
})
self.present(alert, animated: true, completion: nil)
print("Favourite button Pressed")
}
This is where I want to store my objects
import Foundation
class FavouriteManager {
static let shared = FavouriteManager()
var favSet: Set<CurrentPlayers> = Set()
func add(_ player: CurrentPlayers) {
favSet.insert(player)
NotificationCenter.default.post(
name: .passFavNotification,
object: player
)
}
}