如何在 swift 的 tableView 中向左滑动时更改单元格颜色

Question

我在表格视图中有 3 个操作按钮，我想在滑动时更改当前单元格的背景颜色，如果我滑动另一个单元格，则应还原预选的单元格，仅应更改当前单元格的背景颜色。 我正在使用trailingSwipeActionsConfigurationForRowAt代表进行滑动操作，但我不知道如何更改当前滑动单元格的背景颜色，任何想法请帮助我。

func tableView(_ tableView: UITableView, trailingSwipeActionsConfigurationForRowAt indexPath: IndexPath) -> UISwipeActionsConfiguration? {
        
        let viewButton = UIContextualAction(style: .normal, title: "") {  (contextualAction, view, boolValue) in
            // View action
            print("View action")
            
        }
        viewButton.backgroundColor = .gray
        viewButton.image = UIImage(named: "view")
    
        //Approve
    
        let approveButton = UIContextualAction(style: .normal, title: "") {  (contextualAction, view, boolValue) in
            // Approve action
            print("Approve action")
            
        }
        approveButton.backgroundColor = .gray
        approveButton.image = UIImage(named: "accept")
    
    
        //Reject
    
        let rejectButton = UIContextualAction(style: .normal, title: "") {  (contextualAction, view, boolValue) in
            // Reject action
            print("Reject action")
            
        }
        rejectButton.backgroundColor = .gray
        rejectButton.image = UIImage(named: "reject")
    

        var swipeActions = UISwipeActionsConfiguration(actions: [rejectButton, approveButton, viewButton])
        
        swipeActions.performsFirstActionWithFullSwipe = false
        return swipeActions
   }

Answer 1

有一百万种方法可以实现数据 model。 只是给你一个想法，你可以改变你可以使用tableView.cellForRow(at: indexPath :

var selectedCell:IndexPath? //this hold the index path of the selected cell 

override func tableView(_ tableView: UITableView, trailingSwipeActionsConfigurationForRowAt indexPath: IndexPath) -> UISwipeActionsConfiguration? {
   
    // your code here .....

    if let cell = tableView.cellForRow(at: indexPath) {
            if selectedCell == nil {
                print("selected cell is nil")
                //first selection
                cell.backgroundColor = .red
                selectedCell = indexPath
                
            }else{
                if tableView.indexPath(for: cell) != selectedCell {
                    // you are selecting another cell
                    cell.backgroundColor = .red
                    tableView.cellForRow(at: selectedCell!)?.backgroundColor = nil
                    selectedCell = indexPath
                }
            }
      }
}

Answer 2

func tableView(_ tableView: UITableView, willBeginEditingRowAt indexPath: IndexPath) {
    let cell = tableView.cellForRow(at: indexPath)
    cell?.contentView.backgroundColor = .red

}

func tableView(_ tableView: UITableView, didEndEditingRowAt indexPath: IndexPath?) {
    if indexPath != nil {
        let cell = tableView.cellForRow(at: indexPath!)
        cell?.contentView.backgroundColor = .red
    }
    
}