UINavigationControllerDelegate‘s didShowViewController method was called twice

Question

class ViewController: UIViewController, UINavigationControllerDelegate {

      override func viewDidLoad() {
         super.viewDidLoad()
         navigationController!         


        

Answer 1

I hit the same issue in my code. I was able to work around it by waiting until viewDidAppear to set the navigation delegate instead of setting it in viewDidLoad. To translate it to your example:

override func viewDidLoad() {
   super.viewDidLoad()
}

// ...

override func viewDidAppear(_ animated: Bool) {
    super.viewDidAppear(animated)
    navigationController!.delegate = self
}