谢谢，

required init(coder aDecoder: NSCoder) {
    super.init(coder: aDecoder)

    let blur:UIBlurEffect = UIBlurEffect(style: UIBlurEffectStyle.Light)
    let effectView:UIVisualEffectView = UIVisualEffectView (effect: blur)
    effectView.frame = frame
    addSubview(effectView)
}