Navigation bar is moving up to statusbar

问题:

I have a viewController. Which does not have navigationBar. I am pushing another viewController that has navigationBar. Which is going up I am using following code to show the navigationBar

self.navigationController?.setNavigationBarHidden(false, animated: false)

回答1:

I believe you trying to hide navigationBar in firstVC and show it in secondVC.

Try following method into your firstVC and make sure you embedded your firstVC with navigationController.

Your storyBoard flow layout should be look like below...

Implement below method in firstVC.

override func viewWillAppear(_ animated: Bool) {

    self.navigationController?.setNavigationBarHidden(true, animated: true)
}

override func viewWillDisappear(_ animated: Bool) {

    self.navigationController?.setNavigationBarHidden(false, animated: true)   
}

Output:Updated