Recording audio on WatchOS over AVAudioRecorder - swift

Question

Is there any sample code or tutorials about that? I've found that AVAudioRecorder supported since WatchOS 4.0 https://developer.apple.com/documentation/avfoundation/avaudiorecorder. But when I am trying to use it - it records 1 second and no actual sound (just noise).
Here is my code:
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)
}
Also, should I use AudioSession here? If yes, is it required requestRecordPermission and how do deal with it? Thank you for your help!

Answer 1

This one works:
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
}
Don't forget to add NSMicrophoneUsageDescription into your phone companion app Info.plist.