swift - ios 11 custom navbar goes under status bar

Question

just downloaded xcode 9 and i'm having this weird issue, on ios 11 my custom navbar appears to be half in size and is under the status bar, on ios 10 works fine.

so here is my code

let newNavbar: UINavigationBar = UINavigationBar(frame: CGRect(x: 0, y: 0, width: view.frame.width, height: 64))
let navItem = UINavigationItem()

//create and assign the items

newNavbar.setItems([navItem], animated: false)
view.addSubview(newNavbar)

here is a screenshot, ios11 on the left and ios10 on the right,

Answer 1

Your code was always wrong. You should not be setting the height of a manually added navigation bar yourself or placing it at the top of the view. You should pin the top of the navigation bar to the bottom of the status bar (e.g. the top of the Safe Area) and give it a delegate so that you can use the UIBarPositioningDelegate mechanism to set its position to .topAttached, which will cause it to stretch up to the top of the screen correctly.

(But you should also be asking yourself why you are adding a navigation bar manually. There is usually no reason not to wrap your view controller in a UINavigationController — even if you don't intend to do any actual navigation — just to get the navigation bar, with all its automatic management.)