iOS开发笔记-132:swift5，简单的高斯模糊

        let effect = UIBlurEffect(style: .light)
        let effectV = UIVisualEffectView.init(effect: effect)
        effectV.frame = CGRect(x: 0, y: 0, width: kScreenW, height: bgH)
        
        colorBgN.view.addSubview(effectV)