ios - How do I put UISearchController Searchbar onto navigation bar with code -


if embed viewcontroller navigation bar, navigationitem.titleview.resultsearchcontroller?.searchbar put search bar navigation bar. however, i've created uisearchcontroller , uinavigationbar code. time, navbar showing up, searchbar isn't. 

resultsearchcontroller = uisearchcontroller(searchresultscontroller: locationsearchtable) resultsearchcontroller?.searchresultsupdater = locationsearchtable  let searchbar = resultsearchcontroller!.searchbar searchbar.sizetofit() searchbar.delegate = self  let navbar: uinavigationbar = uinavigationbar(frame: cgrect(x: 0, y:0, width: 375, height: 64)) self.view.addsubview(navbar) //navbar.topitem = resultsearchcontroller?.searchbar self.navigationitem.titleview = resultsearchcontroller?.searchbar

navbar.topitem = resultsearchcontroller?.searchbar doesn't work because topitem string value , resultsearchcontroller?.searchbar uiview type. how can achieve same effect?

create uinavigationitem instance , add created navigation bar. add search controller search bar uinavigationitem titleview.

class searchviewcontroller: uiviewcontroller, uisearchcontrollerdelegate, uisearchresultsupdating, uisearchbardelegate {      var searchcontroller: uisearchcontroller!      override func viewdidload() {         super.viewdidload()         self.addnavigationbar()     }      func addnavigationbar() {         let navbar = uinavigationbar(frame: cgrect(x: 0, y: 0, width: self.view.frame.size.width, height: 60))         self.view.addsubview(navbar)          let navigationitem = uinavigationitem(title: "")         self.searchcontroller = searchcontrollerwith(searchresultscontroller: nil)         navigationitem.titleview = self.searchcontroller.searchbar          navbar.setitems([navigationitem], animated: false)         self.definespresentationcontext = true     }      func searchcontrollerwith(searchresultscontroller: uiviewcontroller?) -> uisearchcontroller {          let searchcontroller = uisearchcontroller(searchresultscontroller: searchresultscontroller)         searchcontroller.delegate = self         searchcontroller.searchresultsupdater = self         searchcontroller.searchbar.delegate = self         searchcontroller.hidesnavigationbarduringpresentation = false         searchcontroller.dimsbackgroundduringpresentation = true          return searchcontroller     }

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