ios - How to Enable Local Storage in Web Application Swift View -

i developing small app in swift3 ios, developed android had problem replicated here. happens have webview have upload videos, youtube videos reproduced without problems (both android , ios), problem arises when want play video example jwplayer, problem had in android property not enabled write disk , solution follows:

final webview mybrowser; mybrowser.getsettings().setdomstorageenabled(true); 

what solution swift3?

i found solution:

var prefs: webpreferences? = webview.prefereces prefs?._setlocalstoragedatabasepath("~/library/application support/myapp") prefs?.localstorageenabled = true 

but error:

use of undeclared type webpreferences

i pay attention comments, greetings , many in advance.

i update question.

import uikit import webkit  class viewcontroller: uiviewcontroller {     @iboutlet var webview: webview!      override func viewdidload() {         super.viewdidload()          webview.loadurl( string: "www.google.com")     }      class webview: wkwebview{         required init?(coder: nscoder) {             if let _view = uiview(coder: coder){                 super.init(frame: _view.frame, configuration: wkwebviewconfiguration())                 autoresizingmask = _view.autoresizingmask              }else{             return nil             }         }          func loadurl(string: string){             if let url = url(string: string ) {                 load(urlrequest(url: url))             }         }     } }