How to prevent navbar hiding when keyboard appears ios? - swift

Question

I have an app which has a webview on a storyboard, which loads a registration form in ASP, so when the keyboard or a picker appears, the navbar hides, but never comes back, so I'm not able to go back to the last page.
Here's my code:
import UIKit
class BannerViewController: UIViewController {
#IBOutlet var webView11: UIWebView!
override var preferredStatusBarStyle: UIStatusBarStyle {
return .default
}
override var prefersStatusBarHidden: Bool {
return false
}
override func viewWillAppear(_ animated: Bool) {
self.navigationItem.setHidesBackButton(false, animated: true)
self.setNeedsStatusBarAppearanceUpdate()
self.navigationController?.navigationBar.barTintColor = UIColor(red: 0, green: 0.38, blue: 0.667, alpha: 1)
self.navigationController?.navigationBar.tintColor = UIColor(red: 1, green: 1, blue: 1, alpha: 1)
var titleTextAttributes = [String : AnyObject]();
titleTextAttributes[NSFontAttributeName] = UIFont.systemFont(ofSize: 17, weight: UIFontWeightSemibold)
titleTextAttributes[NSForegroundColorAttributeName] = UIColor(red: 1, green: 1, blue: 1, alpha: 1)
self.navigationController?.navigationBar.titleTextAttributes = titleTextAttributes
}
override func viewDidLoad() {
super.viewDidLoad();
self.navigationController?.navigationBar.barStyle = .default
self.setNeedsStatusBarAppearanceUpdate()
self.navigationController?.setNavigationBarHidden(false, animated: true)
self.webView11.delegate = self;
if let unwrappedwebView11 = URL(string: "http://www.stackoverflow") {
self.webView11.loadRequest(URLRequest(url: unwrappedwebView11))
}
}
}
extension BannerViewController: UIWebViewDelegate {
}

Answer 1

So, it looks like i need to refresh the view or something, as i added a back button out of the webView and when i click and go back to last view, and then i got in again to the webView the navBar doesn´t move anymore