ios - headerview from previous view takes up space in UISearchController search results -

i have simple tableview, dailyattendancecontroller, searchbar. searchbar added in viewdidload. view tableview here.

import uikit  class oldcellstableviewcontroller: uitableviewcontroller {      let data = ["a", "b", "c"]     var searchcontroller:uisearchcontroller!     let resultscontroller = searchresultsupdater()      override func viewdidload() {         super.viewdidload()          resultscontroller.data = data          searchcontroller = uisearchcontroller(searchresultscontroller: resultscontroller)          let searchbar = self.searchcontroller.searchbar         searchbar.scopebuttontitles = ["all", "short", "long"]         searchbar.placeholder = "search student"         searchbar.sizetofit()         self.tableview.tableheaderview = searchbar          self.searchcontroller.searchresultsupdater = resultscontroller     }      // mark: - table view data source      override func tableview(tableview: uitableview, numberofrowsinsection section: int) -> int {         return data.count     }      override func tableview(tableview: uitableview, cellforrowatindexpath indexpath: nsindexpath) -> uitableviewcell {         let cell = uitableviewcell()         let info = data[indexpath.row]         cell.textlabel?.text = info         return cell     }  } 

i created class, searchresultscontroller, handle search. searching works fine, space allocated dailyattendancecontroller's header. view searchresultscontroller here

how remove this?

code searchresultscontroller:

import uikit import coredata  class searchresultscontroller: uitableviewcontroller, uisearchresultsupdating {  var data:[string] = [] var filtereddata:[string] = []  override func viewdidload() {     super.viewdidload() }  override func didreceivememorywarning() {     super.didreceivememorywarning() }  // mark: - table view data source  override func tableview(tableview: uitableview, numberofrowsinsection section: int) -> int {     return filtereddata.count }  func updatesearchresultsforsearchcontroller(searchcontroller: uisearchcontroller) {     filtereddata.removeall(keepcapacity: true)     let searchstring = searchcontroller.searchbar.text      info in data {         if (info.uppercasestring.rangeofstring(searchstring.uppercasestring) != nil) {             filtereddata.append(info)         }     }      tableview.reloaddata() }  override func tableview(tableview: uitableview, cellforrowatindexpath indexpath: nsindexpath) -> uitableviewcell {     let cell = uitableviewcell()     cell.textlabel?.text = filtereddata[indexpath.row]     return cell }  }