对iOS14 系统前、后的分割线适配（UIPickerView）

extension UIPickerView {
func adapterPickerView() {
self.tag = 9999
if #available(iOS 14.0, ) {
self.subviews[1].backgroundColor = .clear
let topLineImgView = UIImageView.init(frame: .zero)
self.subviews[1].addSubview(topLineImgView)
topLineImgView.snp.makeConstraints { (make) in
make.top.equalToSuperview()
make.centerX.equalToSuperview()
make.height.equalTo(2)
make.width.equalTo(SKScale(float: 882))
}
topLineImgView.image = UIImage.init(named: "icon_Sheet_topImgView")

        let bottomLineImgView = UIImageView.init(frame: .zero)
        self.subviews[1].addSubview(bottomLineImgView)
        bottomLineImgView.snp.makeConstraints { (make) in
            make.bottom.equalToSuperview()
            make.centerX.equalToSuperview()
            make.height.equalTo(2)
            make.width.equalTo(SKScale(float: 88*2))
        }
        bottomLineImgView.image = UIImage.init(named: "icon_Sheet_topImgView")
    }else{
        for  view in self.subviews {
            if view.frame.size.height <= 2 {

                let bgView = UIView.init(frame: .zero)
                view.addSubview(bgView)
                bgView.snp.makeConstraints { (make) in
                    make.top.equalToSuperview()
                    make.bottom.equalToSuperview()
                    make.left.equalToSuperview()
                    make.right.equalToSuperview()
                }
                bgView.backgroundColor = self.backgroundColor

                let topLineImgView = UIImageView.init(frame: .zero)
                view.addSubview(topLineImgView)
                topLineImgView.snp.makeConstraints { (make) in
                    make.top.equalToSuperview()
                    make.bottom.equalToSuperview()
                    make.centerX.equalToSuperview()
                    make.width.equalTo(SKScale(float: 88*2))
                }
                topLineImgView.image = UIImage.init(named: "icon_Sheet_topImgView")
            }
        }
    }

}

}

//适配代码一定要写在数据源之后
func pickerView(_ pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusing view: UIView?) -> UIView {

    if pickerView.tag != 9999 {
        pickerView.adapterPickerView()
    }

}