UIColor-Utility.swift

import UIKit

extension UIColor {
  static func randomLightColor() -> UIColor {
    let halfRange: ClosedRange<CGFloat> = 0.5 ... 1.0
    return UIColor(
      red: CGFloat.random(in: halfRange),
      green: CGFloat.random(in: halfRange),
      blue: CGFloat.random(in: halfRange),
      alpha: 1
    )
  }
}

UIView-Utility.swift

import UIKit

extension UIView {
  func addSubviewWithFlair(_ view: UIView) {
    self.addSubview(view)
    view.transform = CGAffineTransform(scaleX: 0.0001, y: 0.0001)
    UIView.animate(withDuration: 1.0, delay: 0.0, usingSpringWithDamping: 0.4, initialSpringVelocity: 0.0, options: [], animations: { view.transform = .identity }, completion: nil)
  }
  
  var hasShadow: Bool {
    get {
      return self.layer.shadowPath != nil
    }
    set(newValue) {
      switch newValue {
      case true: // add shadow
        self.layer.shadowRadius = 4
        self.layer.shadowOffset = CGSize(width: 4, height: 4)
        self.layer.shadowOpacity = 0.5
        self.layer.shadowPath = UIBezierPath(roundedRect: self.bounds, cornerRadius: self.layer.cornerRadius).cgPath
      case false: // remove shadow
        self.layer.shadowRadius = 0
        self.layer.shadowOffset = .zero
        self.layer.shadowOpacity = 0
        self.layer.shadowPath = nil
      }
    }
  }
}