swift - 代码创建 pickerView 显示或隐藏横线

概述1 import UIKit 2 3 class VC1: UIViewController { 4 5 fileprivate lazy var pickerV : UIPickerView = { 6 let v = UIPickerView(frame: CGRect(x: 100, y: 100, width: 200, height: 400

 1 import UIKit 2  3 class VC1: UIVIEwController { 4      5     fileprivate lazy var pickerV : UIPickerVIEw = { 6         let v = UIPickerVIEw(frame: CGRect(x: 100,y: 100,wIDth: 200,height: 400)) 7         v.delegate = self 8         v.dataSource = self 9         v.backgroundcolor = .orange10 11         return v12     }()13 14     overrIDe func touchesBegan(_ touches: Set<UItouch>,with event: UIEvent?) {15      vIEw.addSubvIEw(pickerV)16         pickerV.showsSelectionIndicator = false17         18     }19 }20 21 extension UIVIEwController:UIPickerVIEwDelegate,UIPickerVIEwDataSource{22     public func numberOfComponents(in pickerVIEw: UIPickerVIEw) -> Int {23         return 124     }25     26     public func pickerVIEw(_ pickerVIEw: UIPickerVIEw,rowHeightForComponent component: Int) -> CGfloat {27         return 20028     }29     public func pickerVIEw(_ pickerVIEw: UIPickerVIEw,numberOfRowsInComponent component: Int) -> Int {30         return 1031     }32     33     public func pickerVIEw(_ pickerVIEw: UIPickerVIEw,vIEwForRow row: Int,forComponent component: Int,reusing vIEw: UIVIEw?) -> UIVIEw {34         pickerVIEw.subvIEws[1].backgroundcolor = UIcolor.blue35         pickerVIEw.subvIEws[1].isHIDden = false36         pickerVIEw.subvIEws[2].backgroundcolor = UIcolor.purple37         pickerVIEw.subvIEws[2].isHIDden = false38         39         40         /// 俩根线中间的VIEW41         let v = UIVIEw()42         v.frame = CGRect(x: 0,y: 0,wIDth: 50,height:100)43         v.backgroundcolor = UIcolor.green44         return v45     }46 }

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