Make UINavigationBar Clear

navBarClear.swift

extension UINavigationBar {
 func makeClear() {
  backgroundColor = .clear
  setBackgroundImage(UIImage(), for .default)
  shadowImage = UIImage()
 }
}

// USAGE

class ViewController: UIViewController {
 override func viewDidLoad() {
  super.viewDidLoad()
  navigationController?.navigationBar.makeClear()
 }
}