swift - 代码创建 pickerView 显示或隐藏横线

 import UIKit

 class VC1: UIViewController {

     fileprivate lazy var pickerV : UIPickerView = {
         let v = UIPickerView(frame: CGRect(x: , y: , width: , height: ))
         v.delegate = self
         v.dataSource = self
         v.backgroundColor = .orange

         return v
     }()

     override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
      view.addSubview(pickerV)
         pickerV.showsSelectionIndicator = false

     }
 }

 extension UIViewController:UIPickerViewDelegate, UIPickerViewDataSource{
     public func numberOfComponents(in pickerView: UIPickerView) -> Int {
         return
     }

     public func pickerView(_ pickerView: UIPickerView, rowHeightForComponent component: Int) -> CGFloat {
         return
     }
     public func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
         return
     }

     public func pickerView(_ pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusing view: UIView?) -> UIView {
         pickerView.subviews[].backgroundColor = UIColor.blue
         pickerView.subviews[].isHidden = false
         pickerView.subviews[].backgroundColor = UIColor.purple
         pickerView.subviews[].isHidden = false

         /// 俩根线中间的VIEW
         let v = UIView()
         v.frame = CGRect(x: , y: , width: , height:)
         v.backgroundColor = UIColor.green
         return v
     }
 }