class NewAnimation : RAMItemAnimation

  // method call when Tab Bar Item is selected
  override func playAnimation(icon: UIImageView, textLabel: UILabel) {
    // add animation
  }

  // method call when Tab Bar Item is deselected
  override func deselectAnimation(icon: UIImageView, textLabel: UILabel, defaultTextColor: UIColor, defaultIconColor: UIColor) {
    // add animation
  }

  // method call when TabBarController did load
  override func selectedState(icon: UIImageView, textLabel: UILabel) {
    // set selected state  
  }

import RAMAnimatedTabBarController

class RAMBounceAnimation : RAMItemAnimation {

    override func playAnimation(_ icon: UIImageView, textLabel: UILabel) {
        playBounceAnimation(icon)
        textLabel.textColor = textSelectedColor
    }

    override func deselectAnimation(_ icon: UIImageView, textLabel: UILabel, defaultTextColor: UIColor, defaultIconColor: UIColor) {
        textLabel.textColor = defaultTextColor
    }

    override func selectedState(_ icon: UIImageView, textLabel: UILabel) {
        textLabel.textColor = textSelectedColor
    }

    func playBounceAnimation(_ icon : UIImageView) {

        let bounceAnimation = CAKeyframeAnimation(keyPath: "transform.scale")
        bounceAnimation.values = [1.0 ,1.4, 0.9, 1.15, 0.95, 1.02, 1.0]
        bounceAnimation.duration = TimeInterval(duration)
        bounceAnimation.calculationMode = kCAAnimationCubic

        icon.layer.add(bounceAnimation, forKey: "bounceAnimation")
    }
}