如何将INT数组保存到CoreData中？

Question

当我尝试保存整数数组（即sets变量）时，会将\ n添加到数组中并使应用崩溃。这是我保存到核心数据的方式；集合看起来与此类似：[225,5,225,5]

func saveExercise(){

    let exercise = Exercise(context: PersistanceManager.shared.context)
    exercise.sets = sets
    exercise.name = exerciseName.text
    print(sets)
    print(exercise)
    PersistanceManager.shared.save()


}

运动实体：

import Foundation
import CoreData


extension Exercise {

@nonobjc public class func fetchRequest() -> NSFetchRequest<Exercise> {
    return NSFetchRequest<Exercise>(entityName: "Exercise")
}

@NSManaged public var name: String?
@NSManaged public var sets: [Int]?

}

PersistanceManager：

import Foundation
import CoreData

final class PersistanceManager {

private init() {}
static let shared = PersistanceManager() 

lazy var persistentContainer: NSPersistentContainer = {

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

lazy var context = persistentContainer.viewContext

func save() { 
    if context.hasChanges {
        do {
            try context.save()
            print("Saved Successfully!")
        } catch {
            let nserror = error as NSError
            fatalError("Unresolved error \(nserror), \(nserror.userInfo)")
        }
    }
 }
 }

这是我的xc.datamodel的样子：

xc.datamodel

最后，这是我运行它时得到的输出： The error that occurs

然后输出print（sets），然后输出print（exercise）： Print Statement Outputs