Late answer but I stumbled across this problem today and found your question and it doesn't have an accepted answer yet.
I got this error while going from a prompted viewController to a non prompted viewController in storyboard.
I got that black bar just like you.
And to fix:
// In prompted vc
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
UIView.setAnimationsEnabled(false)
self.navigationItem.prompt = nil
UIView.setAnimationsEnabled(true)
}
This will remove the prompt instantly before switching viewcontroller.
UPDATE
func prompt() -> String? {
return nil
}
override func viewWillAppear(animated: Bool) {
let action = { self.navigationItem.prompt = self.prompt() }
if self.navigationController?.viewControllers.count <= 1 {
UIView.performWithoutAnimation(action)
}
else {
action()
}
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
UIView.performWithoutAnimation {
self.navigationItem.prompt = (segue.destinationViewController as? ViewController)?.prompt()
}
}