正确使用包含两个数字组件的UIPickerVIew

import UIKit

class ViewController: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource {
    
    let pickerView = UIPickerView()
    let component1Data = [1, 2, 3, 4, 5] // 第一个组件的数据
    let component2Data = [10, 20, 30, 40, 50] // 第二个组件的数据
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        pickerView.delegate = self
        pickerView.dataSource = self
        
        // 设置UIPickerView的位置和大小
        pickerView.frame = CGRect(x: 0, y: 0, width: view.frame.width, height: 200)
        
        view.addSubview(pickerView)
    }
    
    // MARK: - UIPickerViewDataSource
    
    func numberOfComponents(in pickerView: UIPickerView) -> Int {
        return 2 // 返回两个组件
    }
    
    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        if component == 0 {
            return component1Data.count // 第一个组件的行数
        } else {
            return component2Data.count // 第二个组件的行数
        }
    }
    
    // MARK: - UIPickerViewDelegate
    
    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
        if component == 0 {
            return "\(component1Data[row])" // 第一个组件的标题
        } else {
            return "\(component2Data[row])" // 第二个组件的标题
        }
    }
    
    func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
        if component == 0 {
            let selectedValue1 = component1Data[row] // 用户选择的第一个组件的值
            print("Selected value in component 1: \(selectedValue1)")
        } else {
            let selectedValue2 = component2Data[row] // 用户选择的第二个组件的值
            print("Selected value in component 2: \(selectedValue2)")
        }
    }
}