获取单个核心数据元素并合并为单个数组

Question

下面我的快捷代码将3个名称保存到核心数据中。然后在玩笑话中，它获取数据并将其转换为数组。问题出在调试区域，而不是列出3个名称，例如[kim，Hailey，jessica]。它在每一行上列出它们，因此它们不会分组在一个数组中。所以我希望所有3个名字都像[name1，name2，name3]。

    import UIKit
import CoreData

class ViewController: UIViewController,UITextFieldDelegate {
@IBOutlet var labelName : UILabel!
@IBOutlet var enterT : UITextField!

let appDelegate = UIApplication.shared.delegate as! AppDelegate //Singlton instance
var context:NSManagedObjectContext!

override func viewDidLoad() {
    super.viewDidLoad()

    openDatabse()
    joke()

}
func joke() {

    let fetchRequest = NSFetchRequest<NSFetchRequestResult>(entityName: "Users")

 do {
    let results = try context.fetch(fetchRequest)
     let  Locations = results as! [Users]

     for location in Locations {
        print("Array: ",location.username)


     }
    } catch let error as NSError {
       print("Could not fetch \(error) ")
 }

}

func openDatabse()
{
    context = appDelegate.persistentContainer.viewContext
    let entity = NSEntityDescription.entity(forEntityName: "Users", in: context)
    let newUser = NSManagedObject(entity: entity!, insertInto: context)
    let newUser2 = NSManagedObject(entity: entity!, insertInto: context)
    let newUser3 = NSManagedObject(entity: entity!, insertInto: context)
    saveData(UserDBObj: newUser, UserDBObj2: newUser2, UserDBObj3: newUser3)

}

func saveData(UserDBObj:NSManagedObject,UserDBObj2:NSManagedObject,UserDBObj3:NSManagedObject)
{
    UserDBObj.setValue("kim kardashian", forKey: "username")
    UserDBObj2.setValue("jessica biel", forKey: "username")
    UserDBObj3.setValue("Hailey Rienhart", forKey: "username")




    print("Storing Data..")
    do {
        try context.save()
    } catch {
        print("Storing data Failed")
    }

    fetchData()
}

func fetchData()
{
    print("Fetching Data..")
    let request = NSFetchRequest<NSFetchRequestResult>(entityName: "Users")
    request.returnsObjectsAsFaults = false
    do {
        let result = try context.fetch(request)
        for data in result as! [NSManagedObject] {
            let userName = data.value(forKey: "username") as! String

            print("User Name is : "+userName)
        }
    } catch {
        print("Fetching data Failed")
    }
}}

Answer 1

从CoreData获取数据时，将managed object转换为模型类数组。

附加代码以供参考。

   do{
        if let userData = try managedContext?.fetch(fetchRequest) as? [Users]{
               // use this userData for your result and update ui accordingly    
       }

    }catch let error as NSError {
         print("Could not fetch. \(error), \(error.userInfo)")
    }