//動畫為沿y軸旋轉
        let animation = CABasicAnimation(keyPath: "transform.rotation.y")
        animation.fromValue = 0
        animation.toValue = Double.pi * 2
        animation.repeatCount = Float.infinity
        animation.duration = 2
        animatorView.layer.add(animation, forKey: "spin")
        
        
 
//z軸td調大，防止旋轉時被其他控制元件遮擋
        animatorView.layer.zPosition = 100
        
        //將view的tranform改為3d透視
        var transform = CATransform3DIdentity
        transform.m34 = 1.0 / 500.0//透視度
        animatorView.layer.transform = transform