Deleting String from CoreData - swift

Question

I'm having problems deleting an item from my Core Data, and having looked at lots of other examples and questions - they all say about deleting an NSManagedObject whereas I'm trying to delete the item at the indexPath.row (which is a String).
var itemsArray = [String]()
let context = (UIApplication.shared.delegate as! AppDelegate).persistentContainer.viewContext
What would I put in the following function?
func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCell.EditingStyle, forRowAt indexPath: IndexPath) {
if (editingStyle == .delete) {
}
}
Loading items in Core Data
func loadItems() {
let request = NSFetchRequest<NSFetchRequestResult>(entityName: "Items")
request.returnsObjectsAsFaults = false
do {
let results = try context.fetch(request)
if results.count > 0 {
for result in results as! [NSManagedObject] {
if let product = result.value(forKey: "product") as? String {
self.itemsArray.append(product)
}
}
}
} catch {
print("Error")
}
}

Answer 1

To be able to delete the object you have to use the NSManagedObject as data source
var itemsArray = [Items]()
The loadItems can be reduced to
func loadItems() throws {
let request = NSFetchRequest<Items>(entityName: "Items")
request.returnsObjectsAsFaults = false
itemsArray = try context.fetch(request)
}
Put the do - catch block around the loadItems() call and print the error instance, not a meaningless literal string.
In cellForRow use
let item = itemArray[indexPath.row]
let product = item.product
To delete the item you have to remove it from the data source, then delete the item in the context and then save the context:
func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCell.EditingStyle, forRowAt indexPath: IndexPath) {
if editingStyle == .delete {
let objectToDelete = itemArray[indexPath.row]
itemArray.remove(at: indexPath.row)
context.delete(objectToDelete)
// here add code to save the context
self.tableView.deleteRows(at: [indexPath], with: .fade) // and you have to update the table view
}
}