UITableViewCell操作完成后图像更改

Question

音频播放完成后，我有一个关于更改图像的问题。我如何改变细胞的形象？请帮我。我打印了＃34; Done＆＃34;与＆＃39; audioPlayerDidFinishPlaying＆＃39;但我不知道如何控制细胞图像等。

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    if messageList[indexPath.row].fileAudioUid != nil {
        let url = "..."
        startDownload(audioUrl: url)
    }
}


var audioPlayer : AVAudioPlayer!
func startDownload(audioUrl:String) -> Void {
    let fileUrl = self.getSaveFileUrl(fileName: audioUrl)
    let destination: DownloadRequest.DownloadFileDestination = { _, _ in
        return (fileUrl, [.removePreviousFile, .createIntermediateDirectories])
    }

    Alamofire.download(audioUrl, to:destination)
        .downloadProgress { (progress) in
            print(progress)
        }
        .responseData { (data) in
            let url1 = data.destinationURL?.absoluteURL
            print(url1!)
            do {
                self.audioPlayer = try AVAudioPlayer(contentsOf: url1!)
                self.audioPlayer.delegate = self
                self.audioPlayer.prepareToPlay()
                self.audioPlayer.play()
            }catch let error {
                print(error)
            }
    }
}

func audioPlayerDidFinishPlaying(_ player: AVAudioPlayer, successfully flag: Bool) {
    if flag {
        print("Done")
    } else {
        // did not finish successfully
    }
}