滚动时读取PickerView的位置

// 实现PickerView的代理方法
class ViewController: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource {
    
    let data = ["Option 1", "Option 2", "Option 3", "Option 4", "Option 5"]
    var selectedOption: String?
    
    // 设置PickerView的列数
    func numberOfComponents(in pickerView: UIPickerView) -> Int {
        return 1
    }
    
    // 设置PickerView的行数
    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        return data.count
    }
    
    // 设置PickerView的选项内容
    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
        return data[row]
    }
    
    // 监听PickerView的滚动事件
    func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
        selectedOption = data[row]
        print("当前选中的位置：\(row)")
        print("当前选中的选项：\(selectedOption ?? "")")
    }
    
    // 其他PickerView代理方法...
}