我正在尝试在swift中创建一个本地数据库，它将把数据传递给视图控制器中的元素

import UIKit
import CoreData

class ViewController: UIViewController {

    var managedObjectContext: NSManagedObjectContext!

    override func viewDidLoad() {
        super.viewDidLoad()

        // 获取持久化容器
        guard let appDelegate = UIApplication.shared.delegate as? AppDelegate else {
            return
        }
        managedObjectContext = appDelegate.persistentContainer.viewContext

        // 创建实体对象
        let entity = NSEntityDescription.entity(forEntityName: "Person", in: managedObjectContext)!
        let person = NSManagedObject(entity: entity, insertInto: managedObjectContext)
        
        // 设置属性值
        person.setValue("John", forKey: "name")
        person.setValue(25, forKey: "age")
        
        // 保存数据
        do {
            try managedObjectContext.save()
        } catch let error as NSError {
            print("保存数据失败：\(error), \(error.userInfo)")
        }
        
        // 从数据库中检索数据
        let fetchRequest = NSFetchRequest<NSFetchRequestResult>(entityName: "Person")
        do {
            let results = try managedObjectContext.fetch(fetchRequest)
            for data in results as! [NSManagedObject] {
                let name = data.value(forKey: "name") as! String
                let age = data.value(forKey: "age") as! Int
                print("姓名：\(name)，年龄：\(age)")
            }
        } catch let error as NSError {
            print("检索数据失败：\(error), \(error.userInfo)")
        }
    }
}