I want to create subscription, that allows user to work my with app

I already have an array: var imgArr = [UIImage]() I want to add there elements: imgArr.append(UIImage) Save it, for example: imgArr.save() // example And then get items from it, to add array elements to cells: func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {         let cell = tableView.dequeueReusableCell(withIdentifier: "MyCell", for: indexPath) 	 cell.imageView!.image = imgArr[indexPath.row]         return cell     }

I have array: var imgs: [UIImage] = userDefaults.object(forKey: "myKey") as? [UIImage] ?? [] How I can save it?