Ios AVAudioPlayer第一次未正确播放音频

我正在做一个项目，必须播放用户自己录制的音频。当应用程序第一次启动并且用户录制了一点音频时，当尝试播放时，AVAudioPlayer似乎在播放，但立即停止。如果用户尝试录制另一段音频，AVAudioPlayer可以正常工作

播放和停止音频的代码：

@objc func playAudio() {
    if audioPlayer == nil {
        do{
            if FileManager.default.fileExists(atPath: filename.path) {
                print("File Exists")
            }
            else {
                print("File Doesnt Exists")
            }

            try audioPlayer = AVAudioPlayer(contentsOf: filename)
            audioPlayer.delegate = self
            audioPlayer.prepareToPlay()
            audioPlayer.play()
            print(audioPlayer.isPlaying)
            print("Playing Audio")
            playStopButton.setImage(#imageLiteral(resourceName: "Stop Button"), for: .normal)
        }catch {
            //displayAlert(title: "Oops!", message: "There was an error. Try Recording Again")
            print(error)
        }
    }
    else {
        playStopButton.setImage(#imageLiteral(resourceName: "Play Button"), for: .normal)
        audioPlayer.stop()
        audioPlayer = nil
    }
}

func audioPlayerDidFinishPlaying(_ player: AVAudioPlayer, successfully flag: Bool) {
    if flag {
        print("Stopping Cuase Comlete")
        playStopButton.setImage(#imageLiteral(resourceName: "Play Button"), for: .normal)
        audioPlayer.stop()
        audioPlayer = nil
    }
}

录音代码

@objc func record() {

    if audioRecorder == nil{

        let settings = [AVFormatIDKey: Int(kAudioFormatMPEG4AAC), AVSampleRateKey: 12000, AVNumberOfChannelsKey:1, AVEncoderAudioQualityKey: AVAudioQuality.high.rawValue]

        do{
            audioRecorder = try AVAudioRecorder(url: filename, settings: settings)
            audioRecorder.delegate = self
            audioRecorder.record()
            //view.backgroundColor = UIColor.red
            //recordButton.setTitle("Stop Recording", for: .normal)
            setupTimer()
            timerDisplay.isHidden = false
            shapeLayer.fillColor = UIColor.black.cgColor

        }catch{
            displayAlert(title: "Oops!", message: "Recording Failed")
        }
    }
    else{
        audioRecorder.stop()
        timer?.invalidate()
        timer = nil
        shapeLayer.strokeEnd = 0
        audioRecorder=nil;

        timerDisplay.isHidden = true
        shapeLayer.fillColor = UIColor.red.cgColor
        let selected = arr[picker.selectedRow(inComponent: 0)]
        UserDefaults.standard.set(selected, forKey: "SelectedTopic")

        present(UINavigationController(rootViewController: PlaybackController()), animated: true, completion: nil)
    }
}

---

录音机也有同样的问题。我通过设置播放器的方法解决了这个问题。像这样：

func setupView() {
        recordingSession = AVAudioSession.sharedInstance()

        do {
            try recordingSession.setCategory(.playAndRecord, mode: .default)
            try recordingSession.setActive(true)
            recordingSession.requestRecordPermission() { [unowned self] allowed in
                DispatchQueue.main.async {
                    if allowed {
                        self.loadRecordingUI()
                    } else {
                        // failed to record
                    }
                }
            }
        } catch {
            // failed to record
        }
    }

然后在我的viewDidLoad.as中调用它：

self.setupView()

---

录音机也有同样的问题。我通过设置播放器的方法解决了这个问题。像这样：

func setupView() {
        recordingSession = AVAudioSession.sharedInstance()

        do {
            try recordingSession.setCategory(.playAndRecord, mode: .default)
            try recordingSession.setActive(true)
            recordingSession.requestRecordPermission() { [unowned self] allowed in
                DispatchQueue.main.async {
                    if allowed {
                        self.loadRecordingUI()
                    } else {
                        // failed to record
                    }
                }
            }
        } catch {
            // failed to record
        }
    }

然后在我的viewDidLoad.as中调用它：

self.setupView()

---

检查第一次提供的路径是否正确？@iOSGeek yes每次都返回true文件存在我看不出会发生任何错误，只是因为文件名提供不正确，因为第二次工作正常，很难捕获error@iOSGeek不可能是文件名每次我面对同样的问题时文件名都是一样的，您找到解决方案了吗？检查第一次提供的路径是否正确？@iOSGeek yes每次都返回true该文件存在我看不出有任何错误可能是因为文件名提供不正确，因为第二次工作正常，难追error@iOSGeek不可能是文件名每次我面对同一个问题时，文件名都是一样的，你找到解决办法了吗？