如何在Swift 3中获取UIPickerView中选中行的字符串值？

import UIKit

class ViewController: UIViewController, UIPickerViewDelegate, UIPickerViewDataSource {
    
    let pickerView = UIPickerView()
    let data = ["Option 1", "Option 2", "Option 3"]
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        pickerView.delegate = self
        pickerView.dataSource = self
        
        // 将pickerView添加到视图中
        // ...
    }
    
    // UIPickerViewDataSource方法，返回pickerView的列数
    func numberOfComponents(in pickerView: UIPickerView) -> Int {
        return 1
    }
    
    // UIPickerViewDataSource方法，返回pickerView指定列的行数
    func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
        return data.count
    }
    
    // UIPickerViewDelegate方法，返回pickerView指定行的标题
    func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
        return data[row]
    }
    
    // UIPickerViewDelegate方法，用户选择了某一行时调用
    func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
        let selectedValue = data[row]
        print("选中的值是：\(selectedValue)")
    }
}