To put it in context, I'm developing an app that is recording a lot of time while in background or in the app. I'm facing two problems using AVAudioRecorder to record in my app:
My recording resumes fine when, for example, I play an audio in WhatsApp or a video in Instagram. But when I play a song in Apple Music or a play a voice note, it doesn't resume the recording again.
If I'm in a Phone Call and I start the recording, my app crashes and outputs the following:
(Error de OSStatus 561017449.)
I think also need to handle when the input/output device changes so my app doesn't crash.
The code that I implemented for the class where I'm recording (and also playing the sound I use recorder so I can try it and see if it works) is this:
class RecordViewController: UIViewController, AVAudioPlayerDelegate , AVAudioRecorderDelegate {
@IBOutlet weak var principalLabel: UILabel!
@IBOutlet weak var loginLabel: UILabel!
@IBOutlet weak var recordBTN: UIButton!
@IBOutlet weak var playBTN: UIButton!
var audioRecorder : AVAudioRecorder!
var audioPlayer : AVAudioPlayer!
var isAudioRecordingGranted: Bool!
var isRecording = false
var isPlaying = false
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = .white
check_record_permission()
checkActivateMicrophone()
NotificationCenter.default.addObserver(self, selector: #selector(handleInterruption(notification:)), name: AVAudioSession.interruptionNotification, object: audioRecorder)
let tapRegister: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(self.goToLogin))
loginLabel.addGestureRecognizer(tapRegister)
loginLabel.isUserInteractionEnabled = true
}
@objc func goToLogin() {
self.performSegue(withIdentifier: "goToLogin", sender: self)
}
@objc func handleInterruption(notification: Notification) {
guard let userInfo = notification.userInfo,
let typeInt = userInfo[AVAudioSessionInterruptionTypeKey] as? UInt,
let type = AVAudioSession.InterruptionType(rawValue: typeInt) else {
return
}
switch type {
case .began:
if isRecording {
print("OOOOOOO")
audioRecorder.pause()
}
break
case .ended:
guard let optionsValue = userInfo[AVAudioSessionInterruptionOptionKey] as? UInt else { return }
let options = AVAudioSession.InterruptionOptions(rawValue: optionsValue)
if options.contains(.shouldResume) {
audioRecorder.record()
print("AAAAAAA")
} else {
print("III")
DispatchQueue.main.asyncAfter(deadline: .now() + 2.0) {
self.audioRecorder.record()
}
}
default: ()
}
}
func check_record_permission()
{
switch AVAudioSession.sharedInstance().recordPermission {
case AVAudioSessionRecordPermission.granted:
isAudioRecordingGranted = true
break
case AVAudioSessionRecordPermission.denied:
isAudioRecordingGranted = false
break
case AVAudioSessionRecordPermission.undetermined:
AVAudioSession.sharedInstance().requestRecordPermission({ (allowed) in
if allowed {
self.isAudioRecordingGranted = true
} else {
self.isAudioRecordingGranted = false
}
})
break
default:
break
}
}
func checkActivateMicrophone() {
if !isAudioRecordingGranted {
playBTN.isEnabled = false
playBTN.alpha = 0.5
recordBTN.isEnabled = false
recordBTN.alpha = 0.5
principalLabel.text = "Activa el micrófono desde ajustes"
} else {
playBTN.isEnabled = true
playBTN.alpha = 1
recordBTN.isEnabled = true
recordBTN.alpha = 1
principalLabel.text = "¡Prueba las grabaciones!"
}
}
func getDocumentsDirectory() -> URL
{
let paths = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)
let documentsDirectory = paths[0]
return documentsDirectory
}
func getFileUrl() -> URL
{
let filename = "myRecording.m4a"
let filePath = getDocumentsDirectory().appendingPathComponent(filename)
return filePath
}
func setup_recorder()
{
if isAudioRecordingGranted
{
let session = AVAudioSession.sharedInstance()
do
{
try session.setCategory(AVAudioSession.Category.playAndRecord, options: .defaultToSpeaker)
try session.setActive(true)
let settings = [
AVFormatIDKey: Int(kAudioFormatMPEG4AAC),
AVSampleRateKey: 44100,
AVNumberOfChannelsKey: 2,
AVEncoderAudioQualityKey:AVAudioQuality.high.rawValue
]
audioRecorder = try AVAudioRecorder(url: getFileUrl(), settings: settings)
audioRecorder.delegate = self
audioRecorder.isMeteringEnabled = true
audioRecorder.prepareToRecord()
}
catch let error {
print(error.localizedDescription)
}
}
else
{
print("AAAAA")
}
}
@IBAction func recordAct(_ sender: Any) {
if(isRecording) {
finishAudioRecording(success: true)
recordBTN.setTitle("Record", for: .normal)
playBTN.isEnabled = true
isRecording = false
}
else
{
setup_recorder()
audioRecorder.record()//aaaaaa
recordBTN.setTitle("Stop", for: .normal)
playBTN.isEnabled = false
isRecording = true
}
}
func finishAudioRecording(success: Bool)
{
if success
{
audioRecorder.stop()
audioRecorder = nil
print("recorded successfully.")
}
else
{
print("Recording failed.")
}
}
func prepare_play()
{
do
{
audioPlayer = try AVAudioPlayer(contentsOf: getFileUrl())
audioPlayer.delegate = self
audioPlayer.prepareToPlay()
}
catch{
print("Error")
}
}
@IBAction func playAct(_ sender: Any) {
if(isPlaying)
{
audioPlayer.stop()
recordBTN.isEnabled = true
playBTN.setTitle("Play", for: .normal)
isPlaying = false
}
else
{
if FileManager.default.fileExists(atPath: getFileUrl().path)
{
recordBTN.isEnabled = false
playBTN.setTitle("pause", for: .normal)
prepare_play()
audioPlayer.play()
isPlaying = true
}
else
{
print("Audio file is missing.")
}
}
}
func audioRecorderDidFinishRecording(_ recorder: AVAudioRecorder, successfully flag: Bool)
{
if !flag
{
print("UUU")
finishAudioRecording(success: false)
}
playBTN.isEnabled = true
}
func audioPlayerDidFinishPlaying(_ player: AVAudioPlayer, successfully flag: Bool)
{
recordBTN.isEnabled = true
}
}
I implemented the "Background Mode" of Audio, AirPlay and Picture in Picture