/*

 Copyright (C) 2017 Apple Inc. All Rights Reserved.

 See LICENSE.txt for this sample’s licensing information

 Abstract:

 A UIView subclass that draws a gray hairline along its bottom

  border, similar to a navigation bar.  This view is used as the navigation

  bar extension view in the Extended Navigation Bar example.

 */

import UIKit

class ExtendedNavBarView: UIView {

    /**

     *  Called when the view is about to be displayed.  May be called more than

     *  once.

     */

    override func willMove(toWindow newWindow: UIWindow?) {

        super.willMove(toWindow: newWindow)

        // Use the layer shadow to draw a one pixel hairline under this view.

        layer.shadowOffset = CGSize(width: 0, height: CGFloat(1) / UIScreen.main.scale)

        layer.shadowRadius = 0

        // UINavigationBar's hairline is adaptive, its properties change with

        // the contents it overlies.  You may need to experiment with these

        // values to best match your content.

        layer.shadowColor = #colorLiteral(red: 0, green: 0, blue: 0, alpha: 1).cgColor

        layer.shadowOpacity = 0.25

    }

}