如何在swift4中点击addImage按钮将图片逐个添加到tableviewcell中

var images = [UIImage]()

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return images.count
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! CustomTableViewCell
    cell.imageView?.image = images[indexPath.row]
    return cell
}

@IBAction func addImage(_ sender: UIButton) {
    let imagePicker = UIImagePickerController()
    imagePicker.delegate = self
    present(imagePicker, animated: true, completion: nil)
}

extension ViewController: UIImagePickerControllerDelegate, UINavigationControllerDelegate {
    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
        if let image = info[.originalImage] as? UIImage {
            images.append(image)
            tableView.reloadData()
        }
        picker.dismiss(animated: true, completion: nil)
    }
}