swift - 代碼建立 pickerView 顯示或隱藏橫線

標籤：file   als   ima   UNC   sele   self   fun   建立   selection   

 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         /// 倆根線中間的VIEW41         let v = UIView()42         v.frame = CGRect(x: 0, y: 0, width: 50, height:100)43         v.backgroundColor = UIColor.green44         return v45     }46 }

 

swift - 代碼建立 pickerView 顯示或隱藏橫線