[uitableview] Pit 1: tableview:heightforheaderinsection: method does not execute

iOS11 after

tableView:heightForHeaderInSection: Proxy method method does not execute

- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section {

return 10;

}

- (CGFloat)tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)section {

   return 10;

}

After setting the following two attribute values , The above two methods can respond to

_tableView.sectionHeaderHeight = 0.01;

_tableView.sectionFooterHeight = 0.01;