Apple Mach-O 链接器警告未找到目录

Swift
import UIKit
import CoreData
class ViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 获取应用程序的代理对象
        guard let appDelegate = UIApplication.shared.delegate as? AppDelegate else {
            return
        }
        
        // 获取托管对象上下文
        let managedContext = appDelegate.persistentContAIner.viewContext
        
        // 创建实体描述
        guard let entity = NSEntityDescription.entity(forEntityName: "Person", in: managedContext) else {
            return
        }
        
        // 创建新的Person对象
        let person = NSManagedObject(entity: entity, insertInto: managedContext)
        
        // 设置属性值
        person.setValue("John", forKey: "name")
        person.setValue(25, forKey: "age")
        
        // 保存上下文
        do {
            try managedContext.save()
        } catch let error as NSError {
            print("Could not save. \(error), \(error.userInfo)")
        }
    }
}