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iphone - Custom UITableViewCell button action?

I've been looking around to find a solution to this, but can't seem to find one that works for me. I have a custom cell with a button inside. My problem is how do I pass the indexPath to the action method?

Right now I'm doing

 [cell.showRewards addTarget:self action:@selector(myAction:) forControlEvents:UIControlEventTouchUpInside];

In my cellForRowAtIndexPath method and my method is:

-(IBAction)myAction:(id)sender{
NSIndexPath *indexPath = [self.tableView indexPathForCell:(MyCustomCell *)[sender superview]];
NSLog(@"Selected row is: %d",indexPath.row);
}

Any tips? Thanks.

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cell.showRewards.tag = indexPath.row;

-(IBAction)myAction:(id)sender
{
UIButton *btn = (UIButton *)sender;
int indexrow = btn.tag;
NSLog(@"Selected row is: %d",indexrow);
}

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