ImageView scale transform when loading in swift

LoadingViewWithImageViewScaleTransform.swift

class LoadingViewWithLogo: NSObject {
  private static let shared = LoadingViewWithLogo()
  private var backView: UIView?
  private var fitcoLogoImageView: UIImageView?
  private override init() { }
  
  static func show() {
    let backView = UIView(frame: .zero)
    backView.backgroundColor = UIColor.black.withAlphaComponent(0.4)
    
    let popupView = UIImageView(image: UIImage(named: "imgLogoBlack"))
    
    if let window = UIApplication.shared.keyWindow {
      window.addSubview(backView)
      backView.frame = window.frame
      backView.addSubview(popupView)
      popupView.center = backView.center
      shared.backView?.removeFromSuperview()
      shared.backView = backView
      shared.fitcoLogoImageView?.removeFromSuperview()
      shared.fitcoLogoImageView = popupView
      shared.startAnimate()
    }
  }
  func startAnimate(){
    UIView.animate(withDuration: 1.0, delay:0, options: [.repeat, .autoreverse], animations: {
      self.fitcoLogoImageView?.transform = CGAffineTransform(scaleX: 1.2, y: 1.2)
    }, completion: {completion in
      self.fitcoLogoImageView?.transform = CGAffineTransform(scaleX: 1, y: 1)
    })
  }
  
  static func hide() {
    if let popupView = shared.fitcoLogoImageView, let backView = shared.backView {
      DispatchQueue.main.async {
        popupView.stopAnimating()
        popupView.removeFromSuperview()
        backView.removeFromSuperview()
      }
    }
  }
}

Scale animation works in the centered imageView.