func setShadow(view:UIView,sColor:UIColor,offset:CGSize,
                   opacity:Float,radius:CGFloat) {
        //设置阴影颜色
        view.layer.shadowColor = sColor.cgColor
        //设置透明度
        view.layer.shadowOpacity = opacity
        //设置阴影半径
        view.layer.shadowRadius = radius
        //设置阴影偏移量
        view.layer.shadowOffset = offset
    }

        bgView.layer.cornerRadius = 10
        
       //切圆角之外的所有view，包含图层
        bgView.layer.masksToBounds = true