[TIL] 2021.06.17

✅⠀TableView Cell Swipe Action

UITableViewDelegate를 활용할 때

• TableView에 연결된 데이터를 삭제 한 후 tableView.deleteRows(at:, with: )를 호출해야 된다.

extension ViewController: UITableViewDelegate{
    func tableView(_ tableView: UITableView, trailingSwipeActionsConfigurationForRowAt indexPath: IndexPath) -> UISwipeActionsConfiguration? {
        guard indexPath.item > 0 else { return nil }
        
        let delete = UIContextualAction(style: .normal, title: nil) { (action, view, completion) in
            self.num -= 1 // 데이터 삭제 후 
            tableView.deleteRows(at: [indexPath], with: .automatic) // 호출 
            completion(true)
        }
        
        delete.backgroundColor = .red
        delete.title = "삭제"
        
        let insert = UIContextualAction(style: .normal, title: nil) { (action, view, completion) in
            self.num += 1
            tableView.reloadData()
            completion(true)
        }
        
        insert.title = "삽입"
        
        
        let configuration = UISwipeActionsConfiguration(actions: [delete, insert])
        configuration.performsFirstActionWithFullSwipe = false
        return configuration
    }
}

• 왼쪽, 오른쪽 둘 다 구현 가능하다.

// leadingSwipe
func tableView(_ tableView: UITableView, leadingSwipeActionsConfigurationForRowAt indexPath: IndexPath) 
// trailing Swipe
func tableView(_ tableView: UITableView, trailingSwipeActionsConfigurationForRowAt indexPath: IndexPath)

RxCocoa를 활용할 때

tableView.rx.itemDeleted
         .subscribe(onNext: { [weak self] indexPath in
            self?.finedustListViewModel.removeFineDust(indexPath.item)
         })
         .disposed(by: disposeBag)