找 Btn 在那個(gè)cell上，計(jì)算好幾層父視圖就寫幾個(gè)superview
UITableViewCell * cell = (UITableViewCell *)[[[btn superview] superview] superview];
NSIndexPath * path = [self.tableView indexPathForCell:cell];
NSInteger sectionIndex = [path section];
NSInteger rowIndex = [path row];
