通过 AVAudioRecorder 在 WatchOS 上录制音频

Question

有没有相关的示例代码或教程？我发现自 WatchOS 4.0 https://developer.apple.com/documentation/avfoundation/avaudiorecorder 以来支持 AVAudioRecorder。但是当我尝试使用它时 - 它记录了 1 秒并且没有实际声音（只是噪音）。

这是我的代码：

let audioURL = self.getRecordedFileURL()
print(audioURL.absoluteString)

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

do {
  recorder = try AVAudioRecorder(url: audioURL, settings: settings)
  recorder?.delegate = self
  recorder?.record()
} catch {
  finishRecording(success: false)
}

另外，我应该在这里使用AudioSession吗？如果是，是否需要 requestRecordPermission 以及如何处理？谢谢您的帮助！

Answer 1

这个有效：

    let recordingName = "audio.m4a"
    let dirPath = getDirectory()
    let pathArray = [dirPath, recordingName]
    guard let filePath = URL(string: pathArray.joined(separator: "/")) else { return }

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

    //start recording
    do {
        audioRecorder = try AVAudioRecorder(url: filePath, settings: settings)
        audioRecorder.delegate = self
        audioRecorder.record()
    } catch {
        print("Recording Failed")
    }
func getDirectory()-> String {
    let dirPath = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0]
    return dirPath
}

不要忘记将 NSMicrophoneUsageDescription 添加到您的 phone 配套应用 Info.plist.

通过 AVAudioRecorder 在 WatchOS 上录制音频

Recording audio on WatchOS over AVAudioRecorder

avfoundation

swift

watchkit

watchos