material-components_material-components-ios/components/ShadowElevations/examples/ShadowElevationsTypicalUseExample.swift

/*
 Copyright 2017-present the Material Components for iOS authors. All Rights Reserved.

 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at

 http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
 */

import Foundation
import MaterialComponents

class ShadowElevationsTypicalUseExample: UIViewController {

  let appBar = MDCAppBar()
  let paper = ShadowElevationsPointsLabel()

  init() {
    super.init(nibName: nil, bundle: nil)

    self.title = "Shadow Elevations (Swift)"
    self.addChildViewController(appBar.headerViewController)

    let color = UIColor(white: 0.2, alpha:1)
    appBar.headerViewController.headerView.backgroundColor = color
    appBar.navigationBar.tintColor = .white
    appBar.navigationBar.titleTextAttributes = [NSForegroundColorAttributeName : UIColor.white]

    let paperDim = CGFloat(200)
    paper.frame =
      CGRect(x: (view.frame.width - paperDim) / 2, y: paperDim, width: paperDim, height: paperDim)
    view.addSubview(paper)

    paper.elevation = .fabResting
  }

  required init?(coder aDecoder: NSCoder) {
    super.init(coder: aDecoder)
  }

  override func viewDidLoad() {
    super.viewDidLoad()

    appBar.addSubviewsToParent()
  }

  override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated)
    self.view.backgroundColor = .white

    self.navigationController?.setNavigationBarHidden(true, animated: animated)
  }

}

// MARK: Catalog by convention
extension ShadowElevationsTypicalUseExample {
  @objc class func catalogBreadcrumbs() -> [String] {
    return ["Shadow", "Shadow Elevations (Swift)"]
  }

  @objc class func catalogIsPrimaryDemo() -> Bool {
    return false
  }

  func catalogShouldHideNavigation() -> Bool {
    return true
  }

  @objc class func catalogIsPresentable() -> Bool {
    return true
  }
}