I try to switch from one screen to another through the service, in the service code:

static func openBannerWebView(_ nav: UINavigationController) { let vc = BannerViewController() nav.pushViewController(vc, animated: true) }

This code is called like this:

 if let nav = self.vc?.navigationController { PostService.openBannerWebView(nav) }

BannerViewController:

 import UIKit import WebKit class BannerViewController: UIViewController { //var url = "" //@IBOutlet weak var webView: UIWebView! override func viewDidLoad() { super.viewDidLoad(); } override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning(); } }

It also created an empty BannerViewController.xib with its specified FileOwner : BannerViewController

When switching to debug, it writes:

 2018-11-14 13:00:00.787712+0300 MyApp_Debug[8610:80602] invalid mode 'kCFRunLoopCommonModes' provided to CFRunLoopRunSpecific - break on _CFRunLoopError_RunCalledWithInvalidMode to debug. This message will only appear once per execution.

What did I miss? Inside xib only label with default text

  • I see you have a commented out webView: UIWebView!, Did you delete the link of this element in the storyboard? Sometimes due to connections in the storyboard there may be mistakes ... - Victor Mishustin

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