Swipe To Delete TableView Row

Question

I have my array:

self.colorNames = [[NSArray alloc] 
initWithObjects:@\"Red\", @\"Green\",
@\"Blue\", @\"Indigo\", @\"Violet\", nil];

I\'ve

Answer 1

You have to implement the necessary UITableViewDelegate and UITableViewDataSource methods.

First, add this:

- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
    return YES;
}

Then:

- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
    if (editingStyle == UITableViewCellEditingStyleDelete) {
        //remove the deleted object from your data source.
        //If your data source is an NSMutableArray, do this
        [self.dataArray removeObjectAtIndex:indexPath.row];
        [tableView reloadData]; // tell table to refresh now
    }
}

Answer 2

Swift 3 and Swift 4 answer without using reloadData

I prefer using deleteRows instead of using reloadData.

func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
    // Enables editing only for the selected table view, if you have multiple table views
    return tableView == yourTableView
}

func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
    if editingStyle == .delete {
        // Deleting new item in the table
        yourTableView.beginUpdates()
        yourDataArray.remove(at: indexPath.row)
        yourTableView.deleteRows(at: [indexPath], with: .automatic)
        yourTableView.endUpdates()
    }
}

Answer 3

You have to add UITableViewDelegate and UITableViewDataSource methods.

You can add multiple buttons on UITableView Row Swipe:

- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
        return YES;
    }

-(NSArray *)tableView:(UITableView *)tableView editActionsForRowAtIndexPath:(NSIndexPath *)indexPath {
    
        UITableViewRowAction *delete = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleDefault title:@"Delete" handler:^(UITableViewRowAction *action, NSIndexPath *indexPath)
        {
            // Delete something here
        }];
        delete.backgroundColor = [UIColor redColor];
    
        UITableViewRowAction *more = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleDefault title:@" More " handler:^(UITableViewRowAction *action, NSIndexPath *indexPath)
        {
           //You function call:
        }];
        more.backgroundColor = [UIColor colorWithRed:0.188 green:0.514 blue:0.984 alpha:1];
    
        return @[delete, more]; //array with all the buttons.
    }`

Answer 4

Swift Version:

func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath) {
     if editingStyle == UITableViewCellEditingStyle.Delete {
         dataArray?.removeAtIndex(indexPath.row)
         tableview.reloadData()
     }
}

Answer 5

Implement the following method:

- (UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath
{
    return UITableViewCellEditingStyleDelete;
}

Answer 6

For a start, your colorNames should be an NSMutableArray rather than an NSArray. You can’t add or remove objects from a regular (non-mutable) array; you’d have to recreate it each time you made a change. Switching that will make this easier. For your implementation of -tableView:commitEditingStyle:forRowAtIndexPath:, you’ll then be able to do something like this:

- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
    if(editingStyle == UITableViewCellEditingStyleDelete)
    {
        [colorNames removeObjectAtIndex:indexPath.row];
        [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationLeft];
    }
}