iOS 7 Programming Cookbook

4.4. Enabling Swipe Deletion of Table View Cells

Problem

You want your application users to be able to delete rows from a table view easily.

Solution

Implement the tableView:editingStyleForRowAtIndexPath: selector in the delegate and the tableView:commitEditingStyle:forRowAtIndexPath: selector in the data source of your table view:

- (UITableViewCellEditingStyle)tableView:(UITableView *)tableView
           editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath{

    return UITableViewCellEditingStyleDelete;

}

- (void) setEditing:(BOOL)editing
           animated:(BOOL)animated{

    [super setEditing:editing
             animated:animated];

    [self.myTableView setEditing:editing
                        animated:animated];


}

- (void)  tableView:(UITableView *)tableView
 commitEditingStyle:(UITableViewCellEditingStyle)editingStyle
  forRowAtIndexPath:(NSIndexPath *)indexPath{

    if (editingStyle == UITableViewCellEditingStyleDelete){

        /* First remove this object from the source */
        [self.allRows removeObjectAtIndex:indexPath.row];

        /* Then remove the associated cell from the Table View */
        [tableView deleteRowsAtIndexPaths:@[indexPath]
                         withRowAnimation:UITableViewRowAnimationLeft];

    }

}

The tableView:editingStyleForRowAtIndexPath: method can enable deletions. It is called by the table view, and its return value determines what the table view allows the user to do (insertion, deletion, etc.). The tableView:commitEditingStyle:forRowAtIndexPath: method carries out the user’s requested deletion. The latter method is defined in the delegate, but its functionality is a bit ...