如何将我自己的枚举作为属性存储在CoreData中

enum MyEnum: Int, NSCoding {
    case case1
    case case2
    case case3
    
    func encode(with coder: NSCoder) {
        coder.encode(self.rawValue, forKey: "rawValue")
    }
    
    init?(coder: NSCoder) {
        guard let rawValue = coder.decodeObject(forKey: "rawValue") as? Int else {
            return nil
        }
        self.init(rawValue: rawValue)
    }
}

class MyEntity: NSManagedObject {
    @NSManaged var myEnum: MyEnum
}

// 存储枚举属性
let context = persistentContainer.viewContext
let entity = NSEntityDescription.insertNewObject(forEntityName: "MyEntity", into: context) as! MyEntity
entity.myEnum = .case1

// 获取枚举属性
let fetchRequest: NSFetchRequest<MyEntity> = MyEntity.fetchRequest()
let results = try context.fetch(fetchRequest)
let myEnum = results.first?.myEnum