无需调用即可刷新tableView willDisplay in Swift

Question

我在ViewController中使用func tableView（_ tableView：UITableView，willDisplay cell：UITableViewCell，forRowAt indexPath：IndexPath）方法对API请求的结果进行分页。一切正常，当我向下滚动并到达最后一个单元格时，将加载下一页，但是我的问题是，当我使用refreshControl刷新表格视图时，我的意思是，当我滚动到顶部并调用refreshControl时，我只需要加载第一页，但之前已加载的所有页均已收费，因为willDisplay已触发。

    class UsersViewController: BaseViewController, UITableViewDelegate, UITableViewDataSource, UIAlertViewDelegate, floatMenuDelegate, UISearchBarDelegate {

        override func viewDidLoad() {

           super.viewDidLoad()

           let refreshControl = UIRefreshControl()

           refreshControl.addTarget(self, action: #selector(refreshTableMain), for: .valueChanged)

            usersTable.refreshControl = refreshControl
       }

       @objc func refreshTableMain(refreshControl: UIRefreshControl) {

           self.page = 1
           self.cUsers.removeAll(keepingCapacity: false)
           self.cSearchUsers.removeAll(keepingCapacity: false)

           self.getUsers(self.page, searchText: self.usersSearchBar.text!, isSearching: false)
           refreshControl.endRefreshing()
       }

        func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {

              let lastSectionIndex = tableView.numberOfSections - 1
              let lastRowIndex = tableView.numberOfRows(inSection: lastSectionIndex) - 1

              if indexPath.section ==  lastSectionIndex && indexPath.row == lastRowIndex {
                   if page < totalPages{
                        page = page + 1
                        getUsers(page, searchText: searchTextField.text!, isSearching: false)
                   }
              }
          }


          func getUsers(_ page: Int, searchText: String, isSearching: Bool) {
                  //get Users of each page
                  // reloadData is called here
          }


   }