Clash Royale CLAN TAG#URR8PPP

fetch core data string and place in a label (Swift4)

I am trying to call 2 different core data strings and place them each on separate labels. Right now I am getting the error Cannot invoke initializer for type 'init(_:)' with an argument list of type '([NSManagedObject])'. This error is coming from j1.text = String(itemsName). I added both view controllers for saving and displaying.

import UIKit
import CoreData

class ViewController: UIViewController

@IBOutlet var j1 : UITextField!
@IBOutlet var j2 : UITextField!


@IBAction func save()

let appD = UIApplication.shared.delegate as! AppDelegate

let context = appD.persistentContainer.viewContext
let entity = NSEntityDescription.entity(forEntityName: "Team", in : context)!

let theTitle = NSManagedObject(entity: entity, insertInto: context)
theTitle.setValue(j1.text, forKey: "score")
theTitle.setValue(j2.text, forKey: "alba")


do
try context.save()

catch
print("Tom Corley")



class twoVC: UIViewController

@IBOutlet var j1 : UILabel!
@IBOutlet var j2 : UILabel!

var itemsName : [NSManagedObject] =
var itemsName2 : [NSManagedObject] =
override func viewDidLoad()
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.

let appD = UIApplication.shared.delegate as! AppDelegate

let context = appD.persistentContainer.viewContext

let fetchRequest = NSFetchRequest<NSManagedObject>(entityName: "Team")
fetchRequest.sortDescriptors = [NSSortDescriptor(key: "score", ascending: true)]


let fetchRequest2 = NSFetchRequest<NSManagedObject>(entityName: "Team")
fetchRequest.sortDescriptors = [NSSortDescriptor(key: "alba", ascending: true)]





do
itemsName = try context.fetch(fetchRequest)
itemsName2 = try context.fetch(fetchRequest2)
if let score = itemsName[0].value(forKey: "score")
j1.text = (score as! String)

if let alba = itemsName2[0].value(forKey: "alba")
j2.text = (alba as? String)



catch
print("Ashley Tisdale")




itemsName

itemsName2

NSManagedObject

2 Answers
2

Loop over the result from the fetch and append to a string that is then used as value for the label, this goes inside the do... where you do the fetch today. Note that I am only using one fetch request here.

do...

itemsName = try context.fetch(fetchRequest)
var mergedScore: String = ""
var mergedAlba: String = ""
for item in itemsName
if let score = item.value(forKey: "score") as? String
mergedScore.append(score)
mergedScore.append(" ") //separator

if let alba = item.value(forKey: "alba") as? String
mergedScore.append(alba)
mergedScore.append(" ") //separator


j1.text = mergedScore
j2.text = mergedAlba


Try this one it's Working for me Swift 4 I think You need to store the value as int which are used as sortDescriptor.

func FetchManagedObjectFromDatabaseForStoreData(Entity :NSEntityDescription) ->
[NSManagedObject]

let fetchRequest = NSFetchRequest<NSFetchRequestResult>()

// Add Sort Descriptor
let sortDescriptor = NSSortDescriptor(key: "order", ascending: true)
let sortDescriptor1 = NSSortDescriptor(key: "is_favourite", ascending: false)

fetchRequest.sortDescriptors = [sortDescriptor,sortDescriptor1]

// Create Entity Description
fetchRequest.entity = Entity

let result : [NSManagedObject] =

// Execute Fetch Request
do
let result = try appDelegate.managedObjectContext.fetch(fetchRequest) as! [NSManagedObject]

if result.count > 0

return result


else

// return result



catch
let fetchError = error as NSError
print(fetchError)


return result



For Fetch Data

// Create Entity Description
let entityDescription = NSEntityDescription.entity(forEntityName: "Your Entity Name Here", in: appDel.managedObjectContext)

let DataObject = FetchManagedObjectFromDatabaseForStoreData(Entity: entityDescription!)

//Convert Array of NSManagedObject into array of [String:AnyObject]
for item in DataObject

let keys = Array(item.entity.attributesByName.keys)

// Here is your result
print((item.dictionaryWithValues(forKeys: keys) as NSDictionary).value(forKey: "id") as Any) // And so On Whatewer you Fetch




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