swift:设置背景阴影

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lazy var doctorView: UIView = {      let view = UIView()      view.layer.backgroundColor = UIColor.white.cgColor      view.layer.shadowColor = UIColor.init(44, 163, 152, 0.08).cgColor      view.layer.cornerRadius = 20*sWidth       view.layer.shadowOffset = CGSize(width: 0, height: 2)       view.layer.shadowOpacity = 1      view.layer.shadowRadius = 6      return view  }()