IconGlyphController.swift

class IconGlyphController: UIViewController {
  let collectionView: UICollectionView = {
    // Construct a collectionView
  }()
  let cellId = "ColorCell"
  let iconsNames = [] //Icon Names
  
  override func viewDidLoad() {
    super.viewDidLoad()
    setupCollectionView()
  }
  
  fileprivate func setupCollectionView() {
    // collectionView AutoLayout...
    // setup collectionView FlawLayout properties..
    self.collectionView.dataSource = self
    self.collectionView.delegate = self
    self.collectionView.register(IconChooseColorCell.self, forCellWithReuseIdentifier: cellId)
  }
}

extension IconGlyphController: UICollectionViewDelegate, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout {
  //..
  
  func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: cellId, for: indexPath) as! IconChooseColorCell
    DispatchQueue.main.async {
      cell.view.image = UIImage(named: self.iconsNames[indexPath.row])
      cell.view.image = cell.view.image?.withRenderingMode(.alwaysTemplate)
      cell.view.tintColor = #colorLiteral(red: 0.1764705926, green: 0.4980392158, blue: 0.7568627596, alpha: 1)
    }
    return cell
  }
  
  func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
    let selectedIcon = UIImage(named: iconsNames[indexPath.row])!
    let iconDict: [String: UIImage] = ["iconDict": selectedIcon]
    NotificationCenter.default.post(name: Notification.Name(rawValue: "iconRefresh"), object: nil, userInfo: iconDict)
  }
  
  //..
}