Saving array to Core Data - ios

Question

I've created two arrays (imgUrl and imgTitle). I want to save these array values in Core Data. I tried like below. However, it is not successful.
//Mark:- Method to save data in local data base(CoreData)
func saveDataInLocal(imageUrl: [String], imageTitle: [String]){
let context = CoreDataStack.sharedInstance.persistentContainer.viewContext
let contactEntity = NSEntityDescription.entity(forEntityName: "Photos", in: context)
let newContact = NSManagedObject(entity: contactEntity!, insertInto: context)
for eachValue in imageTitle{
newContact.setValue(eachValue, forKey: "imgTitle")
}
for eachValue in imageUrl{
newContact.setValue(eachValue, forKey: "imgUrl")
}
do {
try context.save()
fetchData()
} catch {
print("Failed saving")
}
}
XcmodelID is shown in image.
In these two arrays one is image title and another one image URL.
Fetching I'm doing like below.
//Mark:- Method to fetch data from local database(CoreData)
func fetchData(){
let context = CoreDataStack.sharedInstance.persistentContainer.viewContext
let request = NSFetchRequest<NSFetchRequestResult>(entityName: "Photos")
request.returnsObjectsAsFaults = false
do {
let result = try context.fetch(request)
for data in result as! [NSManagedObject] {
imgTitleNew.append(data.value(forKey: "imgTitle") as! String)
imgUrlNew.append(data.value(forKey: "imgUrl") as! String)
}
} catch {
print("Failed")
}
DispatchQueue.main.async {
self.myCollectionView.reloadData()
}
}
Can somebody suggest how to save the array in Core Data?
Array data displayed below.
var imgUrl = [String]() //contains urls in array
var imgTitle = [String]() //contains titles in array

Answer 1

A simple solution is to save both arrays joined with tab (or other unique) characters and use computed properties for the conversion
Assuming the Core Data properties are declared as
#NSManaged public var imageURL: String
#NSManaged public var imageTitle: String
Add these two computed properties
var imageURLArray : [String] {
get { return imageURL.components(separatedBy: "\t") }
set { imageURL = newValue.joined(separator: "\t") }
}
var imageTitleArray : [String] {
get { return imageTitle.components(separatedBy: "\t") }
set { imageTitle = newValue.joined(separator: "\t") }
}