indexPathForCell returns nil since ios7

-(UITableViewCell*)GetCellFromTableView:(UITableView*)tableView Sender:(id)sender {
    CGPoint pos = [sender convertPoint:CGPointZero toView:tableView];
    NSIndexPath *indexPath = [tableView indexPathForRowAtPoint:pos];
    return [tableView cellForRowAtIndexPath:indexPath];
}

http://stackoverflow.com/questions/18743099/indexpathforcell-returns-nil-since-ios7