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import UIKit class ViewController: UIViewController,UIPickerViewDataSource,UIPickerViewDelegate { var pickerView:UIPickerView! override func viewDidLoad() { super.viewDidLoad() pickerView = UIPickerView(frame: CGRect(x: 0,y: 250,width: 350,height:100)) //delegate设为自己 pickerView.delegate = self //DataSource设为自己 pickerView.dataSource = self //设置PickerView默认值 pickerView.selectRow(1,inComponent: 0,animated: true) self.view.addSubview(pickerView) let button = UIButton(frame:CGRect(x: 0,y: 0,width: 100,height: 30)) button.frame = CGRect(x: 150,y: 400,width: 50,height: 50) button.backgroundColor = UIColor.red button.setTitle("确定",for: .normal) button.addTarget(self,action: #selector(ViewController.getPickerViewValue),for: .touchUpInside) self.view.addSubview(button) } @objc func getPickerViewValue(){ let message = String(pickerView.selectedRow(inComponent: 0)) let alret = UIAlertController(title: "选择",message: message,preferredStyle: .alert) self.present(alret,animated: true,completion: nil) DispatchQueue.main.asyncAfter(deadline: DispatchTime.Now() + 1) { self.presentedViewController?.dismiss(animated: true,completion: nil) } } //设置PickerView列数(dataSourse协议) func numberOfComponents(in pickerView: UIPickerView) -> Int { return 3 } //设置PickerView行数(dataSourse协议) func pickerView(_ pickerView: UIPickerView,numberOfRowsInComponent component: Int) -> Int { return 9 } //设置PickerView选项内容(delegate协议) func pickerView(_ pickerView: UIPickerView,titleForRow row: Int,forComponent component: Int) -> String? { return String(row)+"-"+String(component) } //设置列宽 func pickerView(_ pickerView: UIPickerView,widthForComponent component: Int) -> CGFloat { if component == 0{ return 100 } else{ return 200 } } //设置行高 func pickerView(_ pickerView: UIPickerView,rowHeightForComponent component: Int) -> CGFloat { return 50 } //血钙PickerView选项 func pickerView(_ pickerView: UIPickerView,viewForRow row: Int,forComponent component: Int,reusing view: UIView?) -> UIView { //将图片设为PickerView选型 let image = UIImage(named: "icon"+String(row)) let imageView = UIImageView(image:image) //修改字体,大小,颜色 var pickerLabel = view as? UILabel if pickerLabel == nil{ pickerLabel = UILabel() pickerLabel?.font = UIFont.systemFont(ofSize: 16) pickerLabel?.textAlignment = .center } pickerLabel?.text = String(row)+"-"+String(component) pickerLabel?.textColor = UIColor.blue return imageView//pickerLabel!(选择其一) } //检测响应选项的选择状态 func pickerView(_ pickerView: UIPickerView,didSelectRow row: Int,inComponent component: Int) { print(String(row)+"-"+String(component)) } }
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