UIButton Event for Delete Row in UITableView - iphone

Question

I add button in UITableView cell. My code is
UIButton *btnView = [[UIButton buttonWithType:UIButtonTypeContactAdd] retain];
btnView.frame = CGRectMake(280.0, 8.0, 25.0, 25.0);
//[btnView setImage:[UIImage imageNamed:#"invite.png"] forState:UIControlStateNormal];
[btnView addTarget:self action:#selector(action:) forControlEvents:UIControlEventTouchUpInside];
[cell.contentView addSubview:btnView];
[btnView release];
My button action is
- (void)action:(id)sender
{
}
I want to know, how to get current table row index when click. I want to delete table row when click on button.
Edit::
I found a way for delete with animation
[listOfItems removeObjectAtIndex:indexPath.row];
[self.tableview deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationRight];

Answer 1

I believe one approach is to store the row number in the button tag
btnView.tag = [indexPath row]
in the action
- (void)action:(id)sender
{
UIButton * btn = (UIButton)sender;
int row = btn.tag;
}

Answer 2

I usually use this method:
- (IBAction)buttonAction:(id)sender {
UIButton *button = sender;
UIView *contentView = [button superview];
UITableViewCell *cell = (UITableViewCell *)[contentView superview];
NSIndexPath *indexPath = [tableView indexPathForCell:cell];
//Do something
}
Depending on the layout of your UITableViewCell it is possible that you have to traverse deeper into your TableViewCell Views.

Answer 3

http://nshipster.com/associated-objects/ Use an associated object of a NSNumber surrounding the row or the index path itself as the associated object
//when you create the button
objc_setAssociatedObject(button, associationKeyForButton, [NSNumber numberWithInteger:indexPath.row], OBJC_ASSOCIATION_RETAIN_NONATOMIC);
//in the touch up inside handler to get the row back.
NSNumber* rowNumber = objc_getAssociatedObject(sender, associationKeyForButton);