NavBar/CustomBackButton/CustomBackButtonNavController.swift

/*
 Copyright (C) 2017 Apple Inc. All Rights Reserved.
 See LICENSE.txt for this sample’s licensing information
 
 Abstract:
 UINavigationController subclass used for targeting appearance
  proxy changes in the Custom Back Button example.
 */
 
import UIKit
 
class CustomBackButtonNavController: UINavigationController { }