ISO swift语言 图片抖动

var shake = CABasicAnimation()
        shake.fromValue = -0.1
        shake.toValue = +0.1
        shake.duration = 0.1
        shake.autoreverses = true
        shake.repeatCount = 4
        self.logo.layer.addAnimation(shake, forKey: "logo")
        self.logo.alpha = 1.0
        UIView.animateWithDuration(2.0, delay: 2.0, options: UIViewAnimationOptions.CurveEaseIn, animations: nil, completion: nil)

   UIView.animateWithDuration(2.0, delay: 2.0, options: UIViewAnimationOptions.CurveEaseIn, animations: nil, completion: nil)
提示Type'()-> Void' does not conform to protocol 'NilLiteralConvertible'
]如何正确改写成swift语言啊！