swift - 代码创建 UIPickerView 显示或隐藏横线

import UIKit

class VC1: UIViewController {
    
    fileprivate lazy var pickerV : UIPickerView = {
        let v = UIPickerView(frame: CGRect(x: 100, y: 100, width: 200, height: 400))
        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 1
    }
    
    public func pickerView(_ pickerView: UIPickerView, rowHeightForComponent component: Int) -> CGFloat {
        return 200
    }
    public func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        return 10
    }
    
    public func pickerView(_ pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusing view: UIView?) -> UIView {
        pickerView.subviews[1].backgroundColor = UIColor.blue
        pickerView.subviews[1].isHidden = false
        pickerView.subviews[2].backgroundColor = UIColor.purple
        pickerView.subviews[2].isHidden = false
        
        
        /// 俩根线中间的VIEW
        let v = UIView()
        v.frame = CGRect(x: 0, y: 0, width: 50, height:100)
        v.backgroundColor = UIColor.green
        return v
    }
}