使用Swift从核心数据获取数据并在UITextFields中显示

import UIKit
import CoreData

class ViewController: UIViewController {

    @IBOutlet weak var textField1: UITextField!
    @IBOutlet weak var textField2: UITextField!
    
    var managedObjectContext: NSManagedObjectContext!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 初始化核心数据栈
        guard let appDelegate = UIApplication.shared.delegate as? AppDelegate else {
            fatalError("AppDelegate未正确设置")
        }
        managedObjectContext = appDelegate.persistentContainer.viewContext
        
        // 获取数据
        if let data = fetchData() {
            // 在UITextFields中显示数据
            textField1.text = data.value(forKey: "field1") as? String
            textField2.text = data.value(forKey: "field2") as? String
        }
    }
    
    func fetchData() -> NSManagedObject? {
        let fetchRequest = NSFetchRequest<NSManagedObject>(entityName: "YourEntityName")
        
        do {
            let results = try managedObjectContext.fetch(fetchRequest)
            return results.first
        } catch let error as NSError {
            print("获取数据失败：\(error), \(error.userInfo)")
            return nil
        }
    }
}