你好
我的最终目标是创建一个UITableViewController带有应用内录制内容的，FileManager以遍历/Documents/目录并列出在其中找到的所有录制内容。

使用以下设置，一次录制就可以正常进行录制和播放：

// In VC#1

 func setupRecorder(){
    let audioSession:AVAudioSession = AVAudioSession.sharedInstance()
    do {
        try audioSession.setCategory(AVAudioSessionCategoryPlayAndRecord)
    } catch {
        print("Audio Setup Error: \(error)")
    }
    do {
        try audioSession.setActive(true)
    } catch {
        print("Audio Setup Error: \(error)")
    }

    let documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0]

    audioFileName = "test.caf"
    audioFileUrl = documentsDirectory.appendingPathComponent(audioFileName)

    print("\n\nrecording url :\(audioFileUrl.absoluteString)\n\n")

    let recordSettings = [
        AVFormatIDKey: Int(kAudioFormatAppleLossless),
        AVEncoderAudioQualityKey : AVAudioQuality.max.rawValue,
        AVEncoderBitRateKey : 320000,
        AVNumberOfChannelsKey: 2,
        AVSampleRateKey : 44100.0
        ] as [String : Any]

    do {
        audioRecorder = try AVAudioRecorder(url: audioFileUrl, settings: recordSettings)
    } catch let error as NSError{
        print("Audio Setup Error: \(error)")
        audioRecorder = nil
    }
    audioRecorder.delegate = self
    audioRecorder.isMeteringEnabled = true
    audioRecorder.prepareToRecord()
}

...



 override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    if segue.identifier == GraphViewController.getEntrySegue() {
        let navController = segue.destination as! UINavigationController
        let destination = navController.topViewController as! GraphViewController
        destination.audioFileName = audioFileName
        destination.audioFileUrl = audioFileUrl
    }

// In VC#2
func setupAudioPlayer() {
    do {
        try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback)
    } catch {
        print(error)
    }
    do {
        try AVAudioSession.sharedInstance().setActive(true)
    } catch {
        print(error)
    }
    do {
        audioPlayer = try AVAudioPlayer(contentsOf: audioFileUrl)
    } catch {
        print("Audio Player Setup Error: \(error)")
    }
    audioPlayer.prepareToPlay()
}

这一切都很好，很花哨。它可以毫无问题地播放录制的音频文件。但是，当我尝试通过FileManager查找文件时，FileManager无法找到它。下面列出了我尝试查找此文件的尝试。

        print("\(FileManager.default.fileExists(atPath: audioFileUrl.absoluteString))") // -> False

        print("\(FileManager.default.contents(atPath: audioFileUrl.absoluteString))") // -> nil

显然，我必须缺少某些东西……尤其是考虑到AVAudioPlayer已成功读取具有完全相同的URL的音频文件。路径显示为：

file:///var/mobile/Containers/Data/Application/1DA6BD0F-5A23-4228-92A9-A083E55ACE21/Documents/test.caf

有任何想法吗？🧐🤔

非常感谢！

编辑： 在将url作为属性存储之前，我正在执行以下操作，重新计算VC＃2中的documentsDirectory，但是也没有成功：

let documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0]
let results = try? FileManager.default.contentsOfDirectory(atPath: documentsDirectory.absoluteString)