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

Question

I am developing a small app in Swift3 for iOS, I previously developed it for Android where I had a problem that is replicated here. It happens that I have a webview where you have to upload some videos, youtube videos are reproduced without problems (both Android and iOS), the problem arises when you want to play a video for example with JWPlayer, the problem I had in Android Was that the property was not enabled to write to disk and the solution was as follows:
final WebView myBrowser;
myBrowser.getSettings().setDomStorageEnabled(true);
What would be the solution for Swift3?
I found this solution:
var prefs: WebPreferences? = webView.prefereces
prefs?._setLocalStorageDatabasePath("~/Library/Application Support/MyApp")
prefs?.localStorageEnabled = true
But I get an error:
Use of undeclared type WebPreferences
I pay attention to your comments, greetings and many thanks in advance.
I update my 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))
}
}
}
}