change cell's backGroundColor from imagePickerController

Question

Tell me pls how to change cell's backGroundColor from imagePickerController func:

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
        self.dismiss(animated: true, completion: nil)
        //let imageUser = info[UIImagePickerController.InfoKey.editedImage] as! UIImage

        let indexPath = IndexPath(item: 0, section: 0)
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cellRegisterMarket", for: indexPath) as! cellRegisterMarket
        cell.backgroundColor = .red
}

Answer 1

Replace this

let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cellRegisterMarket", for: indexPath) as! cellRegisterMarket

with

let cell = collectionView.cellForItem(at:indexPath) as! cellRegisterMarket

BTW this isn't a good way , update the model and reload the collection