UIPicker设置默认值并更新组件

import UIKit

class ViewController: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource {
    
    let pickerData = [["Option 1", "Option 2", "Option 3"], ["Option A", "Option B", "Option C"]]
    var selectedValues = ["Option 1", "Option A"] // 默认选中的值
    
    @IBOutlet weak var pickerView: UIPickerView!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        pickerView.delegate = self
        pickerView.dataSource = self
        
        // 设置默认选中的行和组件
        for (component, value) in selectedValues.enumerated() {
            if let row = pickerData[component].firstIndex(of: value) {
                pickerView.selectRow(row, inComponent: component, animated: false)
            }
        }
    }
    
    // MARK: - UIPickerViewDataSource
    
    func numberOfComponents(in pickerView: UIPickerView) -> Int {
        return pickerData.count
    }
    
    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        return pickerData[component].count
    }
    
    // MARK: - UIPickerViewDelegate
    
    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
        return pickerData[component][row]
    }
    
    func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
        // 用户选择新值时的操作，可以根据需要进行更新数据源等操作
    }
}