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)
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)
本文标题：iOS开发笔记-132:swift5，简单的高斯模糊
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