ios - AVAudioRecorder swift 2

Question

我的 AVAudioRecorder 工作正常，但自升级到 swift 2 后，我似乎无法弄清楚如何正确配置它。我一直收到一条错误消息，提示无法调用 AVAudioRecorder 初始值设定项，但我提供的参数对我来说是正确的。

var recordSettings = [AVSampleRateKey : NSNumber(float: Float(44100.0)),
    AVFormatIDKey : NSNumber(int: Int32(kAudioFormatMPEG4AAC)),
    AVNumberOfChannelsKey : NSNumber(int: 1),
    AVEncoderAudioQualityKey : NSNumber(int: Int32(AVAudioQuality.Medium.rawValue))]


var recordingURL: NSURL? = nil
var audioRecorder:AVAudioRecorder!


func directoryURL() -> NSURL? {

    let fileManager = NSFileManager.defaultManager()
    let urls = fileManager.URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask)
    let documentDirectory = urls[0] as NSURL
    let soundURL = documentDirectory.URLByAppendingPathComponent("sound.m4a")
    return soundURL 
}

@IBAction func recordPressed(sender: AnyObject) {

    let audioSession: AVAudioSession = AVAudioSession.sharedInstance()

    do {
        try audioSession.setCategory(AVAudioSessionCategoryPlayAndRecord)
    } catch _ {
    }

    do {
        try audioSession.setActive(true)
    } catch _ {
    }

    var error: NSError?

    audioRecorder = AVAudioRecorder(URL: recordingURL, settings: recordSettings, error: &error)

    if let e = error {

        print(e.localizedDescription, terminator: "")
    }
    else
    {
        audioRecorder.record()
        self.stopButton.enabled = true
        self.playButton.enabled = false
        self.recordButton.enabled = false

    }


}

Answer 1

directoryURL 是正确的，但它似乎被误认为是 recordingURL。 recordSettings 也是连贯的。让我提供一个工作版本。

swift 3

var audioRecorder:AVAudioRecorder!

let recordSettings = [
    AVSampleRateKey : NSNumber(value: Float(44100.0)),
    AVFormatIDKey : NSNumber(value:Int32(kAudioFormatMPEG4AAC)),
    AVNumberOfChannelsKey : NSNumber(value: Int32(1)),
    AVEncoderAudioQualityKey :
        NSNumber(value: Int32(AVAudioQuality.medium.rawValue))]

override func viewDidLoad() {
    super.viewDidLoad()

    let audioSession = AVAudioSession.sharedInstance()
    do {
        try audioSession.setCategory(AVAudioSessionCategoryPlayAndRecord)
        try audioRecorder = AVAudioRecorder(url: directoryURL()!,
                                            settings: recordSettings)
        audioRecorder.prepareToRecord()
    } catch {}
}

func directoryURL() -> URL? {
    let fileManager = FileManager.default
    let urls = fileManager.urls(for: .documentDirectory, in: .userDomainMask)
    let documentDirectory = urls[0] as URL
    let soundURL = documentDirectory.appendingPathComponent("sound.m4a")
    return soundURL
}

@IBAction func doRecordAction(_ sender: AnyObject) {
    if !audioRecorder.isRecording {
        let audioSession = AVAudioSession.sharedInstance()
        do {
            try audioSession.setActive(true)
            audioRecorder.record()
        } catch {}
    }
}

@IBAction func doStopAction(_ sender: AnyObject) {
    audioRecorder.stop()
    let audioSession = AVAudioSession.sharedInstance()
    do {
        try audioSession.setActive(false)
    } catch {}
}

旧版:Swift 2

var audioRecorder:AVAudioRecorder!

let recordSettings = [AVSampleRateKey : NSNumber(float: Float(44100.0)),
    AVFormatIDKey : NSNumber(int: Int32(kAudioFormatMPEG4AAC)),
    AVNumberOfChannelsKey : NSNumber(int: 1),
    AVEncoderAudioQualityKey :
        NSNumber(int: Int32(AVAudioQuality.Medium.rawValue))]

override func viewDidLoad() {
    super.viewDidLoad()

    let audioSession = AVAudioSession.sharedInstance()
    do {
        try audioSession.setCategory(AVAudioSessionCategoryPlayAndRecord)
        try audioRecorder = AVAudioRecorder(URL: self.directoryURL()!,
            settings: recordSettings)
        audioRecorder.prepareToRecord()
    } catch {}
}

func directoryURL() -> NSURL? {
    let fileManager = NSFileManager.defaultManager()
    let urls = fileManager.URLsForDirectory(.DocumentDirectory,
                                            inDomains: .UserDomainMask)
    let documentDirectory = urls[0] as NSURL
    let soundURL = documentDirectory.URLByAppendingPathComponent("sound.m4a")
    return soundURL 
}

@IBAction func doRecordAction(sender: AnyObject) {
    if !audioRecorder.recording {
        let audioSession = AVAudioSession.sharedInstance()
        do {
            try audioSession.setActive(true)
            audioRecorder.record()
        } catch {}
    }
}

@IBAction func doStopAction(sender: AnyObject) {
    audioRecorder.stop()
    let audioSession = AVAudioSession.sharedInstance()

    do {
        try audioSession.setActive(false)
    } catch {}
}

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