ios - 在 tableview Swift 3 中保存并显示录制的语音笔记

Question

我是 Swift 的新手，所以任何帮助都将不胜感激。我正在创建这个项目来记录、保存记录的数据并在表格 View 中显示数据。现在我只能录制和播放当前的录音。如果我再次按下录音，之前录制的音频将被删除。但我想永久保存录制的音频并显示在表格 View 中。这是我到目前为止得到的。提前致谢!

import UIKit
import AVFoundation

class ViewController: UIViewController, AVAudioPlayerDelegate, 
AVAudioRecorderDelegate {


    var audioPlayer: AVAudioPlayer?
    var audioRecorder: AVAudioRecorder?

    @IBOutlet weak var recordAudio: UIButton!
    @IBOutlet weak var stopAudio: UIButton!
    @IBOutlet weak var playAudio: UIButton!

    var arrayData: [FileManager] = []

    override func viewDidLoad() {
        super.viewDidLoad()

     playAudio.isEnabled = false
    stopAudio.isEnabled = false

    // Creating File Manager

        let fileMgr = FileManager.default

        let dirPath = fileMgr.urls(for: .documentDirectory, in: .userDomainMask)
        let soundFileUrl = dirPath[0].appendingPathComponent("sound.caf")

        let recordSettings = [AVEncoderAudioQualityKey: AVAudioQuality.min.rawValue,
                              AVEncoderBitRateKey: 16,
                              AVNumberOfChannelsKey: 2,
                              AVSampleRateKey: 44100.0 ] as [String:Any]

        let audioSession = AVAudioSession.sharedInstance()

        do {
                try audioSession.setCategory(AVAudioSessionCategoryPlayAndRecord)

        } catch {

                   print(error.localizedDescription)

        }

        do {
                try audioRecorder = AVAudioRecorder(url: soundFileUrl, settings: recordSettings as [String : Any])

        audioRecorder?.prepareToRecord()

        } catch {

            print(error.localizedDescription)
        }
}

    @IBAction func recordButton(_ sender: Any) {

        if audioRecorder?.isRecording == false {

        playAudio.isEnabled = false
        stopAudio.isEnabled = true
        audioRecorder?.record()
  }

    }

    @IBAction func stopButton(_ sender: Any) {

        stopAudio.isEnabled = false
        playAudio.isEnabled = true
        recordAudio.isEnabled = true

        if audioRecorder?.isRecording == true{

            audioRecorder?.stop()

        }  else {

                audioPlayer?.stop()

        }

}

@IBAction func playButton(_ sender: Any) {

    if audioRecorder?.isRecording == false{

        stopAudio.isEnabled = true
        recordAudio.isEnabled = true

        do {
                try audioPlayer = AVAudioPlayer(contentsOf: (audioRecorder?.url)!)

            audioPlayer!.delegate = self
            audioPlayer!.prepareToPlay()
            audioPlayer!.play()

        } catch {

                print(error.localizedDescription)

        }
    }
}

func audioPlayerDidFinishPlaying(_ player: AVAudioPlayer, successfully flag: Bool) {
    recordAudio.isEnabled = true
    stopAudio.isEnabled = false
}

func audioPlayerDecodeErrorDidOccur(_ player: AVAudioPlayer, error: Error?) {
    print("Audio Player Error")
}

func audioRecorderDidFinishRecording(_ recorder: AVAudioRecorder, successfully flag: Bool) {

}

func audioRecorderEncodeErrorDidOccur(_ recorder: AVAudioRecorder, error: Error?) {
        print("Audio Recorder Error")
}

Answer 1

您只能保存一个视频的原因是您只指定了一个文件名。如果要保留多个视频，则必须使用不同的文件名。您可以要求用户输入视频文件名，然后存储它们。您可以检查是否存在同名视频in this way .

您必须将所有视频文件存储到文档文件夹中，这样当用户关闭并重新打开应用程序时，视频文件仍然存在。一系列视频存储在您手机的内存中，当应用程序关闭时，您将失去所有内容。

将所有视频文件存储在文档文件夹中后，在启动视频 ListView Controller 时，您可以 use this method从文档文件夹中获取视频名称列表，然后在表格 View 中显示名称。