[Leading and Trailing Action on Cell] #swipe

ProductTableViewController.swift

override func tableView(_ tableView: UITableView, trailingSwipeActionsConfigurationForRowAt indexPath: IndexPath) -> UISwipeActionsConfiguration? {
    guard let product = dataStore?.products[indexPath.row] else {
      return nil
    }
    
    let addAction = UIContextualAction(style: .normal, title: "Add") { [weak self](action, view, completionHandler) in
      guard let `self` = self else {
        completionHandler(false)
        return
      }
      self.listController?.addItem(named: product.name)
      completionHandler(true)
    }
    addAction.backgroundColor = UIColor.ggGreen
    
    let configuration = UISwipeActionsConfiguration(actions: [addAction])
    return configuration
  }
  
  override func tableView(_ tableView: UITableView, leadingSwipeActionsConfigurationForRowAt indexPath: IndexPath) -> UISwipeActionsConfiguration? {
    guard let product = dataStore?.products[indexPath.row] else {
      return nil
    }
    
    let copyAction = UIContextualAction(style: .normal, title: "Copy") { (action, view, completionHandler) in
      let data = NSKeyedArchiver.archivedData(withRootObject: product)
      UIPasteboard.general.setData(data, forPasteboardType: Product.productTypeId)
      completionHandler(true)
    }
    copyAction.backgroundColor = UIColor.ggDarkGreen
    
    let configuration = UISwipeActionsConfiguration(actions: [copyAction])
    return configuration
  }