毛玻璃效果

先上效果图：

let mWidth = UIScreen.main.bounds.width

let mHieght = UIScreen.main.bounds.height

override func viewDidLoad() {

super.viewDidLoad()

//模糊效果

let lBlurEffect = UIBlurEffect(style: .light)

let lVisualEffectView = UIVisualEffectView(effect: lBlurEffect)

lVisualEffectView.frame = CGRect(x: 10, y: 100, width: mWidth - 20, height: (mWidth - 20) * 3 / 4)

let lImageView = UIImageView()

lImageView.frame = lVisualEffectView.frame

lImageView.image = UIImage(named: "77.jpeg")

self.view.addSubview(lImageView)

self.view.addSubview(lVisualEffectView)

let lSmallImageView = UIImageView()

lSmallImageView.frame = CGRect(x: 0, y: 0, width: mWidth - 100, height: (mWidth - 100) * 3 / 4)

lSmallImageView.center = lImageView.center

lSmallImageView.image = UIImage(named: "77.jpeg")

self.view.addSubview(lSmallImageView)