ios swift Hide UINavigationBar created by NavigationViewController
<p>I have several views in my storyboard. 
The flow of the program is a user enters start mileage in my MileageViewController (which is a standard UIViewController) and then clicks a button to select their start location from a separate view. This view is a treeviewcontroller and because of editing I had to embed in a NavigationViewController which introduced a UINavigationBar and I have an edit button. I can edit my list (and I'll eventually add adding to the list). </p>

<p>All is fine... until I segue from a cell in the treeview back to my MileageViewController into which I update the title from the selected cell into startLocation UIText... hope I've painted a picture you understand... :)</p>

<p>My problem is that on getting back to the MileageViewController it now has a header (UINavigationBar) with Back to LocationChoiceTreeViewController.... how do I disable the header in this instance?</p>