CNContactViewController hide navigation bar after contactImage fullscreenView

Question

I am showing the contact information page from my application using the following code

let unkvc = CNContactViewController(forContact: Contact)
            unkvc.contactStore = CNContactStore()
            unkvc.delegate = self
            unkvc.allowsActions = true
            self.navigationController?.pushViewController(unkvc, animated: true)

Where Contactis the CNContactfacility

When his push unkvccontroller displays the navigation bar, the back button and the default edit button on the right will appear in the navigation bar. but if the contact has an image, and when I click on the image, its full-screen image is on the screen, but its navigation bar to hide the reverse display does not have a navigation bar, so I have no way to return to the application page. therefore, how to prevent it from hiding the navigation bar

edited: I post a small gif to describe my problem more

Answer 1

Apple.

: fooobar.com/questions/211565/...