save increase int as multiple core data entities - swift

Question

In my swift code below I am trying to save ints to core data. Every time a user hits a button a new int is created. So if the user hits the button twice there are know 2 int entities in core data. My code below is having a runtime error and I dont know how to solve it.
pic
var pageNumber = 0
var itemName : [NSManagedObject] = []
func enterData() {
let appDeldeaget = UIApplication.shared.delegate as! AppDelegate
let context = appDeldeaget.persistentContainer.viewContext
let entity = NSEntityDescription.entity(forEntityName: "Player", in: context)
let theTitle = NSManagedObject(entity: entity!, insertInto: context)
theTitle.setValue(pageNumber, forKey: "positon")
do {
try context.save()
itemName.append(theTitle)
pageNumber += 1
}
catch {
}
self.theScores.reloadData()
positionTextField.text = ""
positionTextField.resignFirstResponder()
}

Answer 1

You are introducing a few complications that might be causing the issue.
First, if I understood your purpose, the itemName should not be an array of NSManagedObject, but rather an array of Player. Also, creating the theTitle can be simplified.
Try this instead of the code you proposed:
var pageNumber = 0
// If I understand correctly, you should have an array of Players
var itemName : [Player] = []
func enterData() {
let appDeldeaget = UIApplication.shared.delegate as! AppDelegate
let context = appDeldeaget.persistentContainer.viewContext
// Simpler way to create a new Core Data object
let theTitle = Player(context: context)
// Simpler way to set the position attribute
theTitle.position = pageNumber // pageNumber must be of type Int64, otherwise use Int64(pageNumber)
do {
try context.save()
itemName.append(theTitle)
pageNumber += 1
} catch {
// handle errors
}
// rest of the code
}