Swift - 选择框（UIPickerView）的用法

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原创最新推荐文章于 2026-04-12 09:58:09 发布 4.7k 阅读 AI 写同款· GEO 优化 ›

[IOS][Swift]点击TextField弹出UIPickerView-选择框(swift) 文章目录创建一个PickerViewStoryboard对应的ViewController类修改继承相关类和初始化添加需要显示的数据定义一个文本框(Text Field)，用户点击文本框弹出pickerViewStoryboard对应的ViewController类修改继承相关类和初始化点击TextField，弹出PickerView用户选中的PickerView数据显示到TextField 创建... 阅读详情

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import UIKit

class ViewController: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource {

    var pickerView:UIPickerView!

    override func viewDidLoad() {
        super.viewDidLoad()

        // 创建UIPickerView控件
        pickerView = UIPickerView()
        self.view.addSubview(pickerView)

        // 设置代理和数据源
        pickerView.delegate = self;
        pickerView.dataSource = self

        // 设置选择框的默认值
        pickerView.selectRow(1, inComponent: 0, animated: true)
        pickerView.selectRow(2, inComponent: 1, animated: true)
        pickerView.selectRow(3, inComponent: 2, animated: true)

        // 创建一个按钮，点击按钮获得选择框被选中的索引
        let button = UIButton(frame: CGRectMake(0,0,100,30))
        button.center = self.view.center
        button.backgroundColor = UIColor.blueColor()
        button.setTitle("获取信息", forState: UIControlState.Normal)
        button.addTarget(self, action: #selector(getPikerViewValue), forControlEvents: UIControlEvents.TouchUpInside)
        self.view.addSubview(button)
    }

    /**
     获取选择框被选中的索引的方法
     */
    func getPikerViewValue(){
        print("被选中的索引为：\(pickerView.selectedRowInComponent(0))、\(pickerView.selectedRowInComponent(1))、\(pickerView.selectedRowInComponent(2))")
    }

    // MARK: UIPickerViewDataSource
    /**
     设置选择框的列数
     */
    func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int {
        return 3
    }

    /**
     设置选择框的行数
     */
    func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        return 9
    }

    // MARK:UIPickerViewDelegate
    /**
     设置选择框各选项的内容
     */
    func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
        return String(row) + "-" + String(component)
    }
}