Populating UICollection with images via Core Data get blank cell image

Hi I currently have the following flow:

UIImagePickerController

Core Data

UICollectionView

UICollectionView

My issue is that I randomly get images loaded and sometimes I dont get any, do I need to set a delay for the view so it can fetch all the images?

PictureViewController

class PictureViewController: UIViewController {

@IBOutlet weak var collectionView: UICollectionView!
let reuseIdentifier = "CellIdentifier"

var imageObj: [Image] =

let appDelegate = UIApplication.shared.delegate as! AppDelegate

override func viewDidLoad() {
super.viewDidLoad()

}

override func viewWillAppear(_ animated: Bool) {
fetchData()
}

override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()

}

func fetchData() {
// Setup fetch data

let container = appDelegate.persistentContainer
let context = container.viewContext
let fetchRequest = NSFetchRequest<Image>(entityName: "Image")

do {
// Retrieve array of all images entities in core data
let images = try context.fetch(fetchRequest)
print("COUNT IS ",images.count)

// For each image entity get the imageData from filepath and assign it to image view
for image in images {
imageObj.append(image)
}
} catch {
print("entered catch for image fetch request")
}
} }

extension PictureViewController: UICollectionViewDelegate, UICollectionViewDataSource {



//UICollectionViewDatasource methods
func numberOfSectionsInCollectionView(collectionView: UICollectionView) -> Int {

return 1
}

func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return self.imageObj.count
}

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: reuseIdentifier, for: indexPath as IndexPath) as! ImagesViewCell

let nsDocumentDirectory = FileManager.SearchPathDirectory.documentDirectory
let nsUserDomainMas = FileManager.SearchPathDomainMask.userDomainMask
let paths = NSSearchPathForDirectoriesInDomains(nsDocumentDirectory, nsUserDomainMas, true)

let imageURL = URL(fileURLWithPath: imageObj[indexPath.row].filePath!)
let image = UIImage(contentsOfFile: imageURL.path)
cell.vaultImageView.image = image

return cell
}
}


ViewCell

class ImagesViewCell: UICollectionViewCell {

@IBOutlet weak var vaultImageView: UIImageView!
}


This is the random stuff I get

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