Swift - UIPickerView

概述import UIKitclass ViewController: UIViewController,UIPickerViewDataSource,UIPickerViewDelegate { var pickerView:UIPickerView! override func viewDidLoad() { super.viewDidLoad()

import UIKitclass 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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