Swift UIBezierPath圆角

    func cornerRadius(cornerView: UIView , cornerSize:Int) {

        let rect = cornerView.bounds

        let radio = CGSize(width: cornerSize, height: cornerSize) // 圆角尺寸

        let corner = UInt8(UIRectCorner.topLeft.rawValue) | UInt8(UIRectCorner.topRight.rawValue) | UInt8(UIRectCorner.bottomLeft.rawValue) | UInt8(UIRectCorner.bottomRight.rawValue)// 这只圆角位置

        let path = UIBezierPath(roundedRect: rect, byRoundingCorners: UIRectCorner(rawValue: UIRectCorner.RawValue(corner)), cornerRadii: radio)

        let masklayer = CAShapeLayer() // 创建shapelayer

        masklayer.frame = cornerView.bounds

        masklayer.path = path.cgPath // 设置路径

        cornerView.layer.mask = masklayer

        

    }