ios - Adding search bar programmatically to tableview in swift -

i have textfield represents tableview inputview. want add 2 things tableview.

1) add search bar.
2) add cancell button top of tableview.

class enteryourdealvc: uiviewcontroller, uitableviewdatasource, uitableviewdelegate, uisearchbardelegate, uisearchdisplaydelegate, uisearchresultsupdating { var tableview: uitableview  =   uitableview() let searchcontroller = uisearchcontroller(searchresultscontroller: nil)  var dealairports = [     airports(name: "airport1", shortcut: "ap1")!),     airports(name: "airport2", shortcut: "ap2")!) ] var filteredairports = [airports]()   //view did load     tableview = uitableview(frame: uiscreen.mainscreen().bounds, style: uitableviewstyle.plain)     tableview.delegate      =   self     tableview.datasource    =   self     tableview.registerclass(uitableviewcell.self, forcellreuseidentifier: "cell")      searchcontroller.searchresultsupdater = self     searchcontroller.dimsbackgroundduringpresentation = false     definespresentationcontext = true     tableview.tableheaderview = searchcontroller.searchbar     totextfield.inputview = self.tableview  //here search function func filtercontentforsearchtext(searchtext: string, scope: string = "all") {     filteredairports = dealairports.filter { ap in         return ap.name.lowercasestring.containsstring(searchtext.lowercasestring)     }      tableview.reloaddata() } } 

the problem code, doesn't search. when click search bar dismiss tableview , returns me viewcontroller. how can fix this?

and how can add cancel button tableview?

this add seachbar

lazy var searchbar:uisearchbar = uisearchbar()  override func viewdidload() {     searchbar.searchbarstyle = uisearchbarstyle.prominent     searchbar.placeholder = " search..."     searchbar.sizetofit()     searchbar.translucent = false     searchbar.backgroundimage = uiimage()     searchbar.delegate = self     navigationitem.titleview = searchbar  }  func searchbar(searchbar: uisearchbar, textdidchange textsearched: string) {     ...your code... }