在 WWDC17 上,WatchOS 4 宣布了新的录制功能。我一直在尝试获得 PCM 阵列,但没有成功。
目前我尝试使用以下代码:
检查音频会话:
override func awake(withContext context: Any?) {
super.awake(withContext: context)
let recordingSession = AVAudioSession.sharedInstance()
do {
try recordingSession.setCategory(AVAudioSessionCategoryPlayAndRecord)
try recordingSession.setActive(true)
recordingSession.requestRecordPermission() { [unowned self] allowed in
DispatchQueue.main.async {
if allowed {
self.recordingSessionSuccessfulPermission()
} else {
self.recordingSessionFailPermission()
}
}
}
} catch {
self.recordingSessionFailPermission()
}
}
开始记录:
@IBAction func startRecordButton() {
label.setText("start record")
let audioEngine = AVAudioEngine.init()
let inputNode = audioEngine.inputNode
let format = inputNode.inputFormat(forBus: 0)
inputNode.installTap(onBus: 0, bufferSize: 8000, format: format) { (buf, wheb) in
self.label.setText("It is working")
}
audioEngine.prepare()
do {
try audioEngine.start()
} catch {
// Handle error...
}
}
此代码引发错误:
[audiocomp] 178: registration server connection invalidated
[audiocomp] 170: registration server proxy error: Error Domain=NSCocoaErrorDomain Code=4099 "The connection to service named com.apple.audio.AudioComponentRegistrar was invalidated." UserInfo={NSDebugDescription=The connection to service named com.apple.audio.AudioComponentRegistrar was invalidated.}