Ios 无法转换类型为'；UILabel'；到预期的参数类型'；字符串'；迅速地

我需要关于这个错误的帮助。我无法转换

UILabel类型的值到swift中的预期参数类型
字符串

import AVFoundation
import UIKit

class HeroViewController: UIViewController {

    @IBOutlet weak var nameLbl: UILabel!
    @IBOutlet weak var heroImgVw: UIImageView!
    @IBOutlet weak var quirkLbl: UILabel!
    @IBOutlet weak var characterBtn: UIButton!

    let heroes = Heroes()

    override func viewDidLoad() {
        super.viewDidLoad()

        generateRandomCharacter()
    }


    @IBAction func characterBtnDidTouch(_ sender: Any) {

        generateRandomCharacter()
        let synthesizer = AVSpeechSynthesizer()
        let utterance = AVSpeechUtterance(string: nameLbl)
        utterance.rate = 0.4
        utterance.voice = AVSpeechSynthesisVoice(language: "en-US")
    }

因为，您需要的是标签的文本，而不是标签本身
将let outrance=avspeechoutrance（string:nameLbl）更改为let outrance=avspeechoutrance（string:nameLbl.text）
let utterance = AVSpeechUtterance(string: nameLbl.text)