UIPIckerView:如何定义所选项目再次被选中？

class ViewController: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource {
    let data = ["选项1", "选项2", "选项3", "选项4", "选项5"]
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        let pickerView = UIPickerView()
        pickerView.delegate = self
        pickerView.dataSource = self
        
        // 将pickerView添加到视图中
        
    }
    
    // UIPickerViewDataSource协议方法，返回列数
    func numberOfComponents(in pickerView: UIPickerView) -> Int {
        return 1
    }
    
    // UIPickerViewDataSource协议方法，返回行数
    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        return data.count
    }
    
    // UIPickerViewDelegate协议方法，返回每一行的标题
    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
        return data[row]
    }
    
    // UIPickerViewDelegate协议方法，用户选择某一行时调用
    func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
        // 获取所选行的索引
        let selectedRow = pickerView.selectedRow(inComponent: component)
        
        // 根据需要进行处理，比如打印所选的项目
        print("选中的项目是：\(data[selectedRow])")
    }
}