How to get indexpath of button in a tableView row ?

NSIndexPath *indexPath =[self.YourTable indexPathForCell:(UITableViewCell *)[[sender superview] superview]];
   

Detecting a when a a UIScrollView reaches the bottom.

- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
 if (scrollView.contentOffset.y == scrollView.contentSize.height - scrollView.frame.size.height) {
 // reached the bottom
 }
}