什么是存储大量图像和MP3歌曲iOS Sdk的最佳方式

private var assetLibrary: ALAssetsLibrary!

private var locationManager: CLLocationManager!

private var audioQueue: AudioQueue!

private var isRecording = false

override func viewDidLoad() {

    super.viewDidLoad()

    // Do any additional setup after loading the view.

    // 创建AssetsLibrary

    assetLibrary = ALAssetsLibrary()

    // 创建LocationManager

    locationManager = CLLocationManager()

    locationManager.delegate = self

    locationManager.desiredAccuracy = kCLLocationAccuracyBest

    // 创建AudioQueue

    audioQueue = AudioQueue()

    audioQueue.delegate = self

    // 开始录音

    let recordSettings = [

        AVFormatIDKey: Int(kAudioFormatLinearPCM),

        AVSampleRateKey: 16000,

        AVNumberOfChannelsKey: 1,

        AVSampleFormatKey: kCVPixelFormatType_ARGB2101010LEPacked,

        AVLinearPCMBitDepthKey: 16,

        AVLinearPCMIsSignedIntegerKey: true,

        AVLinearPCMIsFloatKey: false,

        AVNumberOfSamplesKey: 1024

    ]

    do {

        let audioFile = try AVAudioFile(forSettings: recordSettings)

        audioQueue.append(audioFile)

    } catch {

        print("Error creating audio file: \(error)")

    }

    // 设置代理

    audioQueue.setDelegate(self)

    // 开始录音

    audioQueue.prepareToPlay()

    // 创建LocationManager的回调

    let locationUpdateSettings = CLLocationManager.LocationUpdateSettings()

    locationUpdateSettings.desiredAccuracy = kCLLocationAccuracyBest

    locationUpdateSettings.distanceFilter = 1000

    locationManager.requestLocation(locationUpdateSettings, callback: { (location, error) in

        if let error = error {

            print("Error requesting location: \(error.localizedDescription)")

        } else {

            print("Location requested successfully")

            // 计算音频文件的格式

            let format = AVAudioFormat(settings: recordSettings)

            let sampleRate = format.sampleRate

            let numChannels = format.channelCount

            let audioFormat = AVAudioFormat.init(settings: recordSettings)

            let blockSize = 1024

            // 创建音频处理程序

            let audioProcessor = AVAudioProcessor(format: format, blockSize: blockSize)

            audioProcessor.prepare()

            // 创建音频处理程序的回调

            let audioProcessorCallback = AudioProcessorCallback(processor: audioProcessor)

            audioProcessor.callback = audioProcessorCallback

            // 将音频文件添加到音频处理器

            audioProcessor.add(audioQueue.copy() as! AVAudioFile, to: nil)

            // 开始音频处理

            audioProcessor.start()

            // 停止音频处理

            audioProcessor.stop()

        }

    })

}

func audioQueueError(queue: AudioQueue, error: Error) {

    print("Audio queue error: \(error.localizedDescription)")

}

func audioQueueBuffer(queue: AudioQueue, timeStamp: AVAudioTime, buffer: AVAudioPCMBuffer) {

    // 将PCM数据写入内存中

    let sampleData = buffer.floatChannelData![0]

    let sampleCount = buffer.frameLength / buffer.format.sampleRate

    // 写入数据到文件

    let fileUrl = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!.appendingPathComponent("output.pcm")

    do {

        try sampleData.write(to: fileUrl)

    } catch {

        print("Error writing sample data to file: \(error.localizedDescription)")

    }

}

func audioQueueCompletion(queue: AudioQueue, finished: Bool) {

    // 停止LocationManager

    locationManager