あにめ

    class func animationBtn(img : UIImageView){

        img.transform = CGAffineTransformMakeScale(0.2, 0.2)

        img.alpha = 0

        UIView.animateWithDuration(2.0,

            delay: 0,

            usingSpringWithDamping: 0.8,

            initialSpringVelocity: 3.0,

            options: UIViewAnimationOptions.AllowUserInteraction,

            animations: {

                img.alpha = 1.0

                img.transform = CGAffineTransformIdentity

            }, completion: nil)

    }