ios - 使用AVAudioRecorder录制语音

我正在尝试制作一个简单的录音机。我正在使用Xcode-beta 7，并且我的代码基于这三个来源。

AVFoundation Audio Recording With Swift

AVAudioRecorder Reference查看初始化程序的输入。

Recording audio in Swift获取我应该使用

的设置

我正在使用以下代码:

var recordSettings = [
        AVFormatIDKey: kAudioFormatAppleIMA4,
        AVLinearPCMIsBigEndianKey: 0,
        AVLinearPCMIsFloatKey: 0,
        AVNumberOfChannelsKey: 2,
        AVSampleRateKey: 32000
    ]

    var session = AVAudioSession.sharedInstance()

    do{
        try session.setCategory(AVAudioSessionCategoryPlayAndRecord)
        recorder = AVAudioRecorder(URL: filePath, settings: recordSettings, error: nil)
    }catch{
        print("Error")
    }

但它说:“找不到类型为'AVAudioRecorder'的初始化程序，该初始化程序接受类型为'(URL:NSURL ?,设置:[String:AudioFormatID]，错误:nil)'的参数列表”

我的输入不正是文档所要求的吗？

最佳答案

AVAudioRecorder不再需要error参数:

init(URL url: NSURL, settings settings: [String : AnyObject]) throws

另外，我需要解开filePath，如先前答案中所建议:

func recordSound(){
    let dirPath = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as String

    let recordingName = "my_audio.wav"
    let pathArray = [dirPath, recordingName]
    let filePath = NSURL.fileURLWithPathComponents(pathArray)
    let recordSettings = [AVEncoderAudioQualityKey: AVAudioQuality.Min.rawValue,
            AVEncoderBitRateKey: 16,
            AVNumberOfChannelsKey: 2,
            AVSampleRateKey: 44100.0]
    print(filePath)

    let session = AVAudioSession.sharedInstance()
    do {
        try session.setCategory(AVAudioSessionCategoryPlayAndRecord)
        audioRecorder = try AVAudioRecorder(URL: filePath!, settings: recordSettings as! [String : AnyObject])
    } catch _ {
        print("Error")
    }

    audioRecorder.delegate = self
    audioRecorder.meteringEnabled = true
    audioRecorder.prepareToRecord()
    audioRecorder.record()
}

关于ios - 使用AVAudioRecorder录制语音，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/31036892/