How to delete a row of a Table in iPhone - iphone

Question

I have a UITableView and I want to provide the functionality to user to delete the row when he slips or flicks his finger on the row. I know the editing style which provides a circular red button with -ve sign on it. But How to implement the flicking style. I saw many applications using it, so does apple provide any inbuilt delegate for it or we need to write our own controller for it.

Answer 1

In order to get the swipe affect you need to implement the table view delegate
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
method, this will provide access to the swipe interaction for deletion. I typically provide an edit interaction as well for tableviews where deletion is possible since the swipe interaction tends to be a little bit hidden from users.
As an example:
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
[tableView beginUpdates];
if (editingStyle == UITableViewCellEditingStyleDelete) {
// Do whatever data deletion you need to do...
// Delete the row from the data source
[tableView deleteRowsAtIndexPaths:[NSArray arrayWithObjects:indexPath, nil] withRowAnimation:UITableViewRowAnimationTop];
}
[tableView endUpdates];
}
Hope that helps.

Answer 2

I'm almost positive that there is a sample application that does this. A more concrete answer will come soon.
UPDATE: iPhoneCoreDataRecipes gives probably exactly what you're looking for.
On topic, here is one of the sweetest provided methods:
// If I want to delete the next 3 cells after the one you click
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
NSMutableArray* indexPaths = [NSMutableArray array];
for (int i = indexPath.row + 3; i < indexPath.row + 3; i++)
{
[indexPaths addObject:[NSIndexPath indexPathForRow:i inSection:0]];
}
[tableView beginUpdates];
[tableView deleteRowsAtIndexPaths:indexPaths withRowAnimation:UITableViewRowAnimationFade];
[tableView endUpdates];
[tableView deselectRowAtIndexPath:indexPath animated:YES];
}
I think that there is an easier way to accomplish what you want, but then again this is pretty easy. The only difficulty might be deleting yourself...just watch out for segfaults.