Navigation Bars are a versatile part of iOS. Let's take a look at some different ways we can customize their appearance and behavior.
Custom Fonts and Colors
let nba = UINavigationBar.appearance() let bba = UIBarButtonItem.appearance() let titleTextAttributes = [ NSFontAttributeName : navBarFont ] nba.barTintColor = green nba.tintColor = darkGreen nba.titleTextAttributes = titleTextAttributes bba.setTitleTextAttributes(titleTextAttributes, forState: .Normal)
Hide/Show Navigation Bar when Scrolling
navigationController?.hidesBarsOnSwipe = true
This will cause our navigation bar to slide on and off screen as the user scrolls, just like in Safari for iOS.
Empty Back Button
We want a back button with no text. We could set the title of our first view controller to an empty string, but then our first view controller would be title-less. We can get the best of both worlds by giving the first view controller a custom back button item with an empty title. We'll need to do this before we push on a new view controller.
navigationItem.backBarButtonItem = UIBarButtonItem(title: "", style: .Plain, target: nil, action: nil)
Use an Image as a Title
let imageView = UIImageView(image: UIImage(named: "app-logo")!) navigationItem.titleView = imageView