Как записать звук на iPhone с помощью AVAudioRecorder?
Теперь, когда iPhone 3.0 SDK является публичным, я думаю, что я могу задать этот вопрос тем из вас, кто уже играл с 3.0 SDK. Я хочу записывать звук в своем приложении, но я хочу использовать AVAudioRecorder, а не более старый способ записи, как в примере SpeakHere. В Центре разработчиков iPhone нет примеров того, как лучше всего это сделать, а есть только ссылки на занятия. Я новичок в разработке для iPhone, поэтому я ищу простой пример, чтобы начать. Заранее спасибо.
14 ответов
Решение
На самом деле примеров нет вообще. Вот мой рабочий код. Запись запускается пользователем, нажимающим кнопку на панели навигации. В записи используется качество cd (44100 сэмплов), стерео (2 канала), линейная pcm. Осторожно: если вы хотите использовать другой формат, особенно кодированный, убедитесь, что вы полностью понимаете, как установить параметры AVAudioRecorder (внимательно прочитайте документацию по типам аудио), иначе вы никогда не сможете правильно инициализировать его. Еще кое-что. В коде я не показываю, как обрабатывать данные измерений, но вы можете легко это понять. Наконец, обратите внимание, что метод AVAudioRecorder deleteRecording на момент написания статьи приводит к сбою приложения. Вот почему я удаляю записанный файл через диспетчер файлов. Когда запись завершена, я сохраняю записанное аудио как NSData в редактируемом в данный момент объекте, используя KVC.
#define DOCUMENTS_FOLDER [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"]
- (void) startRecording{
UIBarButtonItem *stopButton = [[UIBarButtonItem alloc] initWithTitle:@"Stop" style:UIBarButtonItemStyleBordered target:self action:@selector(stopRecording)];
self.navigationItem.rightBarButtonItem = stopButton;
[stopButton release];
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
NSError *err = nil;
[audioSession setCategory :AVAudioSessionCategoryPlayAndRecord error:&err];
if(err){
NSLog(@"audioSession: %@ %d %@", [err domain], [err code], [[err userInfo] description]);
return;
}
[audioSession setActive:YES error:&err];
err = nil;
if(err){
NSLog(@"audioSession: %@ %d %@", [err domain], [err code], [[err userInfo] description]);
return;
}
recordSetting = [[NSMutableDictionary alloc] init];
[recordSetting setValue :[NSNumber numberWithInt:kAudioFormatLinearPCM] forKey:AVFormatIDKey];
[recordSetting setValue:[NSNumber numberWithFloat:44100.0] forKey:AVSampleRateKey];
[recordSetting setValue:[NSNumber numberWithInt: 2] forKey:AVNumberOfChannelsKey];
[recordSetting setValue :[NSNumber numberWithInt:16] forKey:AVLinearPCMBitDepthKey];
[recordSetting setValue :[NSNumber numberWithBool:NO] forKey:AVLinearPCMIsBigEndianKey];
[recordSetting setValue :[NSNumber numberWithBool:NO] forKey:AVLinearPCMIsFloatKey];
// Create a new dated file
NSDate *now = [NSDate dateWithTimeIntervalSinceNow:0];
NSString *caldate = [now description];
recorderFilePath = [[NSString stringWithFormat:@"%@/%@.caf", DOCUMENTS_FOLDER, caldate] retain];
NSURL *url = [NSURL fileURLWithPath:recorderFilePath];
err = nil;
recorder = [[ AVAudioRecorder alloc] initWithURL:url settings:recordSetting error:&err];
if(!recorder){
NSLog(@"recorder: %@ %d %@", [err domain], [err code], [[err userInfo] description]);
UIAlertView *alert =
[[UIAlertView alloc] initWithTitle: @"Warning"
message: [err localizedDescription]
delegate: nil
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
[alert show];
[alert release];
return;
}
//prepare to record
[recorder setDelegate:self];
[recorder prepareToRecord];
recorder.meteringEnabled = YES;
BOOL audioHWAvailable = audioSession.inputIsAvailable;
if (! audioHWAvailable) {
UIAlertView *cantRecordAlert =
[[UIAlertView alloc] initWithTitle: @"Warning"
message: @"Audio input hardware not available"
delegate: nil
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
[cantRecordAlert show];
[cantRecordAlert release];
return;
}
// start recording
[recorder recordForDuration:(NSTimeInterval) 10];
}
- (void) stopRecording{
[recorder stop];
NSURL *url = [NSURL fileURLWithPath: recorderFilePath];
NSError *err = nil;
NSData *audioData = [NSData dataWithContentsOfFile:[url path] options: 0 error:&err];
if(!audioData)
NSLog(@"audio data: %@ %d %@", [err domain], [err code], [[err userInfo] description]);
[editedObject setValue:[NSData dataWithContentsOfURL:url] forKey:editedFieldKey];
//[recorder deleteRecording];
NSFileManager *fm = [NSFileManager defaultManager];
err = nil;
[fm removeItemAtPath:[url path] error:&err];
if(err)
NSLog(@"File Manager: %@ %d %@", [err domain], [err code], [[err userInfo] description]);
UIBarButtonItem *startButton = [[UIBarButtonItem alloc] initWithTitle:@"Record" style:UIBarButtonItemStyleBordered target:self action:@selector(startRecording)];
self.navigationItem.rightBarButtonItem = startButton;
[startButton release];
}
- (void)audioRecorderDidFinishRecording:(AVAudioRecorder *) aRecorder successfully:(BOOL)flag
{
NSLog (@"audioRecorderDidFinishRecording:successfully:");
// your actions here
}
Хотя это вопрос с ответом (и довольно старый), я решил опубликовать свой полный рабочий код для тех, кому трудно найти хороший пример работы (из коробки) при воспроизведении и записи - включая закодированный, pcm, воспроизведение через динамик., напишите в файл вот оно:
AudioPlayerViewController.h:
#import <UIKit/UIKit.h>
#import <AVFoundation/AVFoundation.h>
@interface AudioPlayerViewController : UIViewController {
AVAudioPlayer *audioPlayer;
AVAudioRecorder *audioRecorder;
int recordEncoding;
enum
{
ENC_AAC = 1,
ENC_ALAC = 2,
ENC_IMA4 = 3,
ENC_ILBC = 4,
ENC_ULAW = 5,
ENC_PCM = 6,
} encodingTypes;
}
-(IBAction) startRecording;
-(IBAction) stopRecording;
-(IBAction) playRecording;
-(IBAction) stopPlaying;
@end
AudioPlayerViewController.m:
#import "AudioPlayerViewController.h"
@implementation AudioPlayerViewController
- (void)viewDidLoad
{
[super viewDidLoad];
recordEncoding = ENC_AAC;
}
-(IBAction) startRecording
{
NSLog(@"startRecording");
[audioRecorder release];
audioRecorder = nil;
// Init audio with record capability
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
[audioSession setCategory:AVAudioSessionCategoryRecord error:nil];
NSMutableDictionary *recordSettings = [[NSMutableDictionary alloc] initWithCapacity:10];
if(recordEncoding == ENC_PCM)
{
[recordSettings setObject:[NSNumber numberWithInt: kAudioFormatLinearPCM] forKey: AVFormatIDKey];
[recordSettings setObject:[NSNumber numberWithFloat:44100.0] forKey: AVSampleRateKey];
[recordSettings setObject:[NSNumber numberWithInt:2] forKey:AVNumberOfChannelsKey];
[recordSettings setObject:[NSNumber numberWithInt:16] forKey:AVLinearPCMBitDepthKey];
[recordSettings setObject:[NSNumber numberWithBool:NO] forKey:AVLinearPCMIsBigEndianKey];
[recordSettings setObject:[NSNumber numberWithBool:NO] forKey:AVLinearPCMIsFloatKey];
}
else
{
NSNumber *formatObject;
switch (recordEncoding) {
case (ENC_AAC):
formatObject = [NSNumber numberWithInt: kAudioFormatMPEG4AAC];
break;
case (ENC_ALAC):
formatObject = [NSNumber numberWithInt: kAudioFormatAppleLossless];
break;
case (ENC_IMA4):
formatObject = [NSNumber numberWithInt: kAudioFormatAppleIMA4];
break;
case (ENC_ILBC):
formatObject = [NSNumber numberWithInt: kAudioFormatiLBC];
break;
case (ENC_ULAW):
formatObject = [NSNumber numberWithInt: kAudioFormatULaw];
break;
default:
formatObject = [NSNumber numberWithInt: kAudioFormatAppleIMA4];
}
[recordSettings setObject:formatObject forKey: AVFormatIDKey];
[recordSettings setObject:[NSNumber numberWithFloat:44100.0] forKey: AVSampleRateKey];
[recordSettings setObject:[NSNumber numberWithInt:2] forKey:AVNumberOfChannelsKey];
[recordSettings setObject:[NSNumber numberWithInt:12800] forKey:AVEncoderBitRateKey];
[recordSettings setObject:[NSNumber numberWithInt:16] forKey:AVLinearPCMBitDepthKey];
[recordSettings setObject:[NSNumber numberWithInt: AVAudioQualityHigh] forKey: AVEncoderAudioQualityKey];
}
NSURL *url = [NSURL fileURLWithPath:[NSString stringWithFormat:@"%@/recordTest.caf", [[NSBundle mainBundle] resourcePath]]];
NSError *error = nil;
audioRecorder = [[ AVAudioRecorder alloc] initWithURL:url settings:recordSettings error:&error];
if ([audioRecorder prepareToRecord] == YES){
[audioRecorder record];
}else {
int errorCode = CFSwapInt32HostToBig ([error code]);
NSLog(@"Error: %@ [%4.4s])" , [error localizedDescription], (char*)&errorCode);
}
NSLog(@"recording");
}
-(IBAction) stopRecording
{
NSLog(@"stopRecording");
[audioRecorder stop];
NSLog(@"stopped");
}
-(IBAction) playRecording
{
NSLog(@"playRecording");
// Init audio with playback capability
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
[audioSession setCategory:AVAudioSessionCategoryPlayback error:nil];
NSURL *url = [NSURL fileURLWithPath:[NSString stringWithFormat:@"%@/recordTest.caf", [[NSBundle mainBundle] resourcePath]]];
NSError *error;
audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:&error];
audioPlayer.numberOfLoops = 0;
[audioPlayer play];
NSLog(@"playing");
}
-(IBAction) stopPlaying
{
NSLog(@"stopPlaying");
[audioPlayer stop];
NSLog(@"stopped");
}
- (void)dealloc
{
[audioPlayer release];
[audioRecorder release];
[super dealloc];
}
@end
Надеюсь, это поможет некоторым из вас, ребята.
Это действительно полезно. Единственной проблемой, с которой я столкнулся, был размер звукового файла, созданного после записи. Мне нужно было уменьшить размер файла, поэтому я сделал некоторые изменения в настройках.
NSMutableDictionary *recordSetting = [[NSMutableDictionary alloc] init];
[recordSetting setValue :[NSNumber numberWithInt:kAudioFormatAppleIMA4] forKey:AVFormatIDKey];
[recordSetting setValue:[NSNumber numberWithFloat:16000.0] forKey:AVSampleRateKey];
[recordSetting setValue:[NSNumber numberWithInt: 1] forKey:AVNumberOfChannelsKey];
Размер файла уменьшен с 360 КБ до всего 25 КБ (2 секунды записи).
Я пытался заставить этот код работать в течение последних 2 часов, и хотя он не показывал ошибки на симуляторе, он был на устройстве.
Оказывается, по крайней мере, в моем случае ошибка произошла из используемой директории (bundle):
NSURL *url = [NSURL fileURLWithPath:[NSString stringWithFormat:@"%@/recordTest.caf", [[NSBundle mainBundle] resourcePath]]];
Это не было доступно для записи или что-то в этом роде... Там не было никакой ошибки, кроме того, что prepareToRecord не удалось...
Поэтому я заменил его на:
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *recDir = [paths objectAtIndex:0];
NSURL *url = [NSURL fileURLWithPath:[NSString stringWithFormat:@"%@/recordTest.caf", recDir]]
Теперь это работает как шарм.
Надеюсь, что это помогает другим.
Большое спасибо @Massimo Cafaro и Shaybc, я смог достичь ниже поставленных задач
в iOS 8:
Записать аудио и сохранить
Воспроизвести сохраненную запись
1. Добавьте "AVFoundation.framework" в ваш проект
в.h файле
2.Добавьте ниже оператор импорта 'AVFoundation / AVFoundation.h'.
3. Определите "AVAudioRecorderDelegate"
4.Создайте макет с помощью кнопок "Запись", "Воспроизведение" и их метидов действия.
5. Определить рекордер и плеер и т. Д.
Вот полный пример кода, который может вам помочь.
ViewController.h
#import <UIKit/UIKit.h>
#import <AVFoundation/AVFoundation.h>
@interface ViewController : UIViewController <AVAudioRecorderDelegate>
@property(nonatomic,strong) AVAudioRecorder *recorder;
@property(nonatomic,strong) NSMutableDictionary *recorderSettings;
@property(nonatomic,strong) NSString *recorderFilePath;
@property(nonatomic,strong) AVAudioPlayer *audioPlayer;
@property(nonatomic,strong) NSString *audioFileName;
- (IBAction)startRecording:(id)sender;
- (IBAction)stopRecording:(id)sender;
- (IBAction)startPlaying:(id)sender;
- (IBAction)stopPlaying:(id)sender;
@end
Тогда делай работу в
ViewController.m
#import "ViewController.h"
#define DOCUMENTS_FOLDER [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"]
@interface ViewController ()
@end
@implementation ViewController
@synthesize recorder,recorderSettings,recorderFilePath;
@synthesize audioPlayer,audioFileName;
#pragma mark - View Controller Life cycle methods
- (void)viewDidLoad
{
[super viewDidLoad];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
}
#pragma mark - Audio Recording
- (IBAction)startRecording:(id)sender
{
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
NSError *err = nil;
[audioSession setCategory :AVAudioSessionCategoryPlayAndRecord error:&err];
if(err)
{
NSLog(@"audioSession: %@ %ld %@", [err domain], (long)[err code], [[err userInfo] description]);
return;
}
[audioSession setActive:YES error:&err];
err = nil;
if(err)
{
NSLog(@"audioSession: %@ %ld %@", [err domain], (long)[err code], [[err userInfo] description]);
return;
}
recorderSettings = [[NSMutableDictionary alloc] init];
[recorderSettings setValue :[NSNumber numberWithInt:kAudioFormatLinearPCM] forKey:AVFormatIDKey];
[recorderSettings setValue:[NSNumber numberWithFloat:44100.0] forKey:AVSampleRateKey];
[recorderSettings setValue:[NSNumber numberWithInt: 2] forKey:AVNumberOfChannelsKey];
[recorderSettings setValue :[NSNumber numberWithInt:16] forKey:AVLinearPCMBitDepthKey];
[recorderSettings setValue :[NSNumber numberWithBool:NO] forKey:AVLinearPCMIsBigEndianKey];
[recorderSettings setValue :[NSNumber numberWithBool:NO] forKey:AVLinearPCMIsFloatKey];
// Create a new audio file
audioFileName = @"recordingTestFile";
recorderFilePath = [NSString stringWithFormat:@"%@/%@.caf", DOCUMENTS_FOLDER, audioFileName] ;
NSURL *url = [NSURL fileURLWithPath:recorderFilePath];
err = nil;
recorder = [[ AVAudioRecorder alloc] initWithURL:url settings:recorderSettings error:&err];
if(!recorder){
NSLog(@"recorder: %@ %ld %@", [err domain], (long)[err code], [[err userInfo] description]);
UIAlertView *alert =
[[UIAlertView alloc] initWithTitle: @"Warning" message: [err localizedDescription] delegate: nil
cancelButtonTitle:@"OK" otherButtonTitles:nil];
[alert show];
return;
}
//prepare to record
[recorder setDelegate:self];
[recorder prepareToRecord];
recorder.meteringEnabled = YES;
BOOL audioHWAvailable = audioSession.inputIsAvailable;
if (! audioHWAvailable) {
UIAlertView *cantRecordAlert =
[[UIAlertView alloc] initWithTitle: @"Warning"message: @"Audio input hardware not available"
delegate: nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
[cantRecordAlert show];
return;
}
// start recording
[recorder recordForDuration:(NSTimeInterval) 60];//Maximum recording time : 60 seconds default
NSLog(@"Recroding Started");
}
- (IBAction)stopRecording:(id)sender
{
[recorder stop];
NSLog(@"Recording Stopped");
}
- (void)audioRecorderDidFinishRecording:(AVAudioRecorder *) aRecorder successfully:(BOOL)flag
{
NSLog (@"audioRecorderDidFinishRecording:successfully:");
}
#pragma mark - Audio Playing
- (IBAction)startPlaying:(id)sender
{
NSLog(@"playRecording");
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
[audioSession setCategory:AVAudioSessionCategoryPlayback error:nil];
NSURL *url = [NSURL fileURLWithPath:[NSString stringWithFormat:@"%@/%@.caf", DOCUMENTS_FOLDER, audioFileName]];
NSError *error;
audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:&error];
audioPlayer.numberOfLoops = 0;
[audioPlayer play];
NSLog(@"playing");
}
- (IBAction)stopPlaying:(id)sender
{
[audioPlayer stop];
NSLog(@"stopped");
}
@end
Для формата WAV ниже настройки звука
NSDictionary *audioSetting = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithFloat:44100.0],AVSampleRateKey,
[NSNumber numberWithInt:2],AVNumberOfChannelsKey,
[NSNumber numberWithInt:16],AVLinearPCMBitDepthKey,
[NSNumber numberWithInt:kAudioFormatLinearPCM],AVFormatIDKey,
[NSNumber numberWithBool:NO], AVLinearPCMIsFloatKey,
[NSNumber numberWithBool:0], AVLinearPCMIsBigEndianKey,
[NSNumber numberWithBool:NO], AVLinearPCMIsNonInterleaved,
[NSData data], AVChannelLayoutKey, nil];
ссылка: http://objective-audio.jp/2010/09/avassetreaderavassetwriter.html
Итак, ответ, который я получил, помог мне в правильном направлении, и я очень благодарен. Это помогло мне понять, как на самом деле записывать на iPhone, но я подумал, что я также включу некоторый полезный код, который я получил из справочной библиотеки iPhone:
Я использовал этот код и довольно легко добавил его в пример avTouch. С помощью приведенного выше примера кода и примера из справочной библиотеки я смог заставить его работать довольно хорошо.
По следующей ссылке вы можете найти полезную информацию о записи с AVAudioRecording. В этой ссылке в первой части "Использование аудио" есть якорь с именем "Запись с классом AVAudioRecorder", который приводит вас к примеру.
This is from Multimedia programming guide...
- (IBAction) recordOrStop: (id) sender {
if (recording) {
[soundRecorder stop];
recording = NO;
self.soundRecorder = nil;
[recordOrStopButton setTitle: @"Record" forState:
UIControlStateNormal];
[recordOrStopButton setTitle: @"Record" forState:
UIControlStateHighlighted];
[[AVAudioSession sharedInstance] setActive: NO error:nil];
}
else {
[[AVAudioSession sharedInstance]
setCategory: AVAudioSessionCategoryRecord
error: nil];
NSDictionary *recordSettings =
[[NSDictionary alloc] initWithObjectsAndKeys:[NSNumber numberWithFloat: 44100.0], AVSampleRateKey,
[NSNumber numberWithInt: kAudioFormatAppleLossless], AVFormatIDKey,
[NSNumber numberWithInt: 1], AVNumberOfChannelsKey,
[NSNumber numberWithInt: AVAudioQualityMax],
AVEncoderAudioQualityKey,
nil];
AVAudioRecorder *newRecorder =
[[AVAudioRecorder alloc] initWithURL: soundFileURL
settings: recordSettings
error: nil];
[recordSettings release];
self.soundRecorder = newRecorder;
[newRecorder release];
soundRecorder.delegate = self;
[soundRecorder prepareToRecord];
[soundRecorder record];
[recordOrStopButton setTitle: @"Stop" forState: UIControlStateNormal];
[recordOrStopButton setTitle: @"Stop" forState: UIControlStateHighlighted];
recording = YES;
}
}
Эти ответы все на Objective-C, вот ответ на Swift. Единственное, что здесь не включено, — это права доступа к микрофону pList , необходимые для записи.
Шаги выложены в 17 комментариях
class ViewController: UIViewController {
var arrOfRecordingUrls: [URL]() // 0. this is for the recordings once you stop recording in step 15. What you do with the recordings afterwards is up to to you.
var micRecorder: AVAudioRecorder? // 1. AVAudioRecorder instance that you will initialize every time you start to record in step 6
override func viewDidLoad() {
super.viewDidLoad()
// 2. set the AudioSession - you should make sure that the user has accepted the microphone permissions in your info.pList sometime before this
do {
try AVAudioSession.sharedInstance().setCategory(.playAndRecord, mode: .default, options: .defaultToSpeaker)
try AVAudioSession.sharedInstance().setActive(true)
} catch {
print(error.debugDescription)
}
}
// 3. recordButton - if the micRecorder is nil start a recording, if not then a recording is currently taking place so stop it
@IBAction func recordButtonTapped(_ sender: Any) {
if micRecorder == nil {
startMicRecording()
} else {
stopMicRecording()
}
}
// *** if the pList Mic Permissions aren't granted then this won't work ***
func startMicRecording() {
// 4. create audioSettings
let myAudioSettings: [String:Any] = [AVFormatIDKey: kAudioFormatMPEG4AAC,
AVNumberOfChannelsKey: 2,
AVSampleRateKey: 44100.0,
AVEncoderBitRateKey: 64000,
AVEncoderAudioQualityKey: AVAudioQuality.min.rawValue
]
// 5. create a file/url which will be where the recording is stored
let dirPath = "\(NSTemporaryDirectory())_Recordings_\(UUID().uuidString).m4a"
let fileURL = URL(fileURLWithPath: dirPath)
do {
// 6. initialize the micRecorder with the audio settings from step 4. and the file/url from step 5
micRecorder = try AVAudioRecorder(url: fileURL, settings: myAudioSettings)
micRecorder?.prepareToRecord() // 7. prepare the micRecorder
micRecorder?.delegate = self // 8. set the delegate so that you can access the recording file/url from step 5 once you are done
micRecorder?.isMeteringEnabled = true // optional
micRecorder?.record() // 9. call .record() to start recording
} catch {
print(error.localizedDescription)
}
}
func stopMicRecording() {
micRecorder?.stop() // 10. call .stop() to stop the recording. At this point the delegate methods from step 12/13/17 will be where the recording output (file/url from step 5) will end up
micRecorder = nil // 11. set the micRecorder to nil
}
}
// 12. set the AVAudioRecorderDelegate which is the .delegate = self from step 8
extension ViewController: AVAudioRecorderDelegate {
// your recording should end up here
func audioRecorderDidFinishRecording(_ recorder: AVAudioRecorder, successfully flag: Bool) {
// 13. if the recording was successful this flag will be true
if flag {
// 14. the file/url from step 5 which is the recording
let successfullyRecordedURL = recorder.url
// 15. add the file/url to the array from step 0.
arrOfRecordingUrls.append(successfullyRecordedURL)
} else {
// 16. the flag was false something went wrong with the recording ???
}
}
// 17. if an error occurs while encoding it will be reported to the delegate
func audioRecorderEncodeErrorDidOccur(_ recorder: AVAudioRecorder, error: Error?) {
guard let error = error else { return }
print(error.localizedDescription)
}
}
-(void)viewDidLoad {
// Setup audio session
AVAudioSession *session = [AVAudioSession sharedInstance];
[session setCategory:AVAudioSessionCategoryPlayAndRecord error:nil];
// Define the recorder setting
NSMutableDictionary *recordSetting = [[NSMutableDictionary alloc] init];
[recordSetting setValue:[NSNumber numberWithInt:kAudioFormatMPEG4AAC] forKey:AVFormatIDKey];
[recordSetting setValue:[NSNumber numberWithFloat:44100.0] forKey:AVSampleRateKey];
[recordSetting setValue:[NSNumber numberWithInt: 2] forKey:AVNumberOfChannelsKey];
// Initiate and prepare the recorder
recorder = [[AVAudioRecorder alloc] initWithURL:outputFileURL settings:recordSetting error:NULL];
recorder.delegate = self;
recorder.meteringEnabled = YES;
[recorder prepareToRecord];
}
- (IBAction)btnRecordDidClicked:(UIButton *)sender {
if (player1.playing) {
[player1 stop];
}
if (!recorder.recording) {
AVAudioSession *session = [AVAudioSession sharedInstance];
[session setActive:YES error:nil];
// Start recording
[recorder record];
[_recordTapped setTitle:@"Pause" forState:UIControlStateNormal];
} else {
// Pause recording
[recorder pause];
[_recordTapped setTitle:@"Record" forState:UIControlStateNormal];
}
[_stopTapped setEnabled:YES];
[_playTapped setEnabled:NO];
}
- (IBAction)btnPlayDidClicked:(UIButton *)sender {
if (!recorder.recording){
player1 = [[AVAudioPlayer alloc] initWithContentsOfURL:recorder.url error:nil];
[player1 setDelegate:self];
[player1 play];
}
}
- (IBAction)btnStopDidClicked:(UIButton *)sender {
[recorder stop];
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
[audioSession setActive:NO error:nil];
}
- (void) audioRecorderDidFinishRecording:(AVAudioRecorder *)avrecorder successfully:(BOOL)flag{
[_recordTapped setTitle:@"play" forState:UIControlStateNormal];
[_stopTapped setEnabled:NO];
[_playTapped setEnabled:YES];
}
НАЧНИТЕ
NSError *sessionError = nil;
[[AVAudioSession sharedInstance] setDelegate:self];
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayAndRecord error:&sessionError];
[[AVAudioSession sharedInstance] setActive: YES error: nil];
UInt32 doChangeDefaultRoute = 1;
AudioSessionSetProperty(kAudioSessionProperty_OverrideCategoryDefaultToSpeaker, sizeof(doChangeDefaultRoute), &doChangeDefaultRoute);
NSError *error = nil;
NSString *filename = [NSString stringWithFormat:@"%@.caf",FILENAME];
NSString *path = [[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"] stringByAppendingPathComponent:filename];
NSURL *soundFileURL = [NSURL fileURLWithPath:path];
NSDictionary *recordSettings = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithInt: kAudioFormatMPEG4AAC], AVFormatIDKey,
[NSNumber numberWithInt:AVAudioQualityMedium],AVEncoderAudioQualityKey,
[NSNumber numberWithInt:AVAudioQualityMedium], AVSampleRateConverterAudioQualityKey,
[NSNumber numberWithInt: 1], AVNumberOfChannelsKey,
[NSNumber numberWithFloat:22050.0],AVSampleRateKey,
nil];
AVAudioRecorder *audioRecorder = [[AVAudioRecorder alloc]
initWithURL:soundFileURL
settings:recordSettings
error:&error];
if (!error && [audioRecorder prepareToRecord])
{
[audioRecorder record];
}
СТОП
[audioRecorder stop];
[audioRecorder release];
audioRecorder = nil;
Согласно приведенным выше ответам, я внес некоторые изменения и получил правильный вывод.
Шаг 1: В "inf.plist" добавьте разрешения на использование микрофона ==>
<key>NSMicrophoneUsageDescription</key>
<string>${PRODUCT_NAME} Microphone Usage</string>
Шаг 2:
Сохраните аудиофайл записи в локальном каталоге документов
Воспроизвести / остановить запись
- Получить продолжительность сохраненного аудиофайла
Вот исходный код. Пожалуйста, посмотрите сразу и используйте его.
ViewController.h
#import <UIKit/UIKit.h>
#import <AVFoundation/AVFoundation.h>
@interface ViewController : UIViewController{
AVAudioPlayer *audioPlayer;
AVAudioRecorder *audioRecorder;
}
-(IBAction) startRecording;
-(IBAction) stopRecording;
-(IBAction) playRecording;
-(IBAction) stopPlaying;
@end
ViewController.m
#import "ViewController.h"
@interface ViewController () <AVAudioRecorderDelegate, AVAudioPlayerDelegate>
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
-(IBAction) startRecording{
// Setup audio session
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
NSError *err = nil;
[audioSession setCategory :AVAudioSessionCategoryPlayAndRecord error:&err];
if(err)
{
NSLog(@"audioSession: %@ %ld %@", [err domain], (long)[err code], [[err userInfo] description]);
return;
}
[audioSession setActive:YES error:&err];
err = nil;
if(err)
{
NSLog(@"audioSession: %@ %ld %@", [err domain], (long)[err code], [[err userInfo] description]);
return;
}
AVAudioSessionRecordPermission permissionStatus = [audioSession recordPermission];
switch (permissionStatus) {
case AVAudioSessionRecordPermissionUndetermined:{
[[AVAudioSession sharedInstance] requestRecordPermission:^(BOOL granted) {
// CALL YOUR METHOD HERE - as this assumes being called only once from user interacting with permission alert!
if (granted) {
// Microphone enabled code
NSLog(@"Mic permission granted. Call method for granted stuff.");
[self startRecordingAudioSound];
}
else {
// Microphone disabled code
NSLog(@"Mic permission indeterminate. Call method for indeterminate stuff.");
// UIApplication.sharedApplication().openURL(NSURL(string: UIApplicationOpenSettingsURLString)!)
}
}];
break;
}
case AVAudioSessionRecordPermissionDenied:
// direct to settings...
NSLog(@"Mic permission denied. Call method for denied stuff.");
break;
case AVAudioSessionRecordPermissionGranted:
// mic access ok...
NSLog(@"Mic permission granted. Call method for granted stuff.");
[self startRecordingAudioSound];
break;
default:
// this should not happen.. maybe throw an exception.
break;
}
}
#pragma mark - Audio Recording
- (BOOL)startRecordingAudioSound{
NSError *error = nil;
NSMutableDictionary *recorderSettings = [[NSMutableDictionary alloc] init];
[recorderSettings setValue :[NSNumber numberWithInt:kAudioFormatLinearPCM] forKey:AVFormatIDKey];
[recorderSettings setValue:[NSNumber numberWithFloat:44100.0] forKey:AVSampleRateKey];
[recorderSettings setValue:[NSNumber numberWithInt: 2] forKey:AVNumberOfChannelsKey];
[recorderSettings setValue :[NSNumber numberWithInt:16] forKey:AVLinearPCMBitDepthKey];
[recorderSettings setValue :[NSNumber numberWithBool:NO] forKey:AVLinearPCMIsBigEndianKey];
[recorderSettings setValue :[NSNumber numberWithBool:NO] forKey:AVLinearPCMIsFloatKey];
// Create a new audio file
NSArray *searchPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentPath_ = [searchPaths objectAtIndex: 0];
NSString *pathToSave = [documentPath_ stringByAppendingPathComponent:[self dateString]];
NSLog(@"the path is %@",pathToSave);
// File URL
NSURL *url = [NSURL fileURLWithPath:pathToSave];//FILEPATH];
//Save recording path to preferences
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
[prefs setURL:url forKey:@"Test1"];
[prefs synchronize];
audioRecorder = [[AVAudioRecorder alloc] initWithURL:url settings:recorderSettings error:&error];
if (!audioRecorder)
{
NSLog(@"Error establishing recorder: %@", error.localizedFailureReason);
return NO;
}
// Initialize degate, metering, etc.
audioRecorder.delegate = self;
audioRecorder.meteringEnabled = YES;
//self.title = @"0:00";
if (![audioRecorder prepareToRecord])
{
NSLog(@"Error: Prepare to record failed");
//[self say:@"Error while preparing recording"];
return NO;
}
if (![audioRecorder record])
{
NSLog(@"Error: Record failed");
// [self say:@"Error while attempting to record audio"];
return NO;
}
NSLog(@"Recroding Started");
return YES;
}
#pragma mark - AVAudioRecorderDelegate
- (void) audioRecorderDidFinishRecording:(AVAudioRecorder *)avrecorder successfully:(BOOL)flag{
NSLog (@"audioRecorderDidFinishRecording:successfully:");
}
#pragma mark - AVAudioPlayerDelegate
- (void) audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag{
NSLog (@"audioPlayerDidFinishPlaying:successfully:");
}
- (NSString *) dateString {
// return a formatted string for a file name
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
formatter.dateFormat = @"ddMMMYY_hhmmssa";
return [[formatter stringFromDate:[NSDate date]]stringByAppendingString:@".aif"];
}
-(IBAction) stopRecording{
NSLog(@"stopRecording");
[audioRecorder stop];
NSLog(@"stopped");
}
-(IBAction) playRecording{
//Load recording path from preferences
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
NSURL *temporaryRecFile = [prefs URLForKey:@"Test1"];
//Get Duration of Audio File
AVURLAsset* audioAsset = [AVURLAsset URLAssetWithURL:temporaryRecFile options:nil];
CMTime audioDuration = audioAsset.duration;
float audioDurationSeconds = CMTimeGetSeconds(audioDuration);
NSLog(@"Duration Of Audio: %f", audioDurationSeconds);
audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:temporaryRecFile error:nil];
audioPlayer.delegate = self;
[audioPlayer setNumberOfLoops:0];
audioPlayer.volume = 1;
[audioPlayer prepareToPlay];
[audioPlayer play];
NSLog(@"playing");
}
-(IBAction) stopPlaying{
NSLog(@"stopPlaying");
[audioPlayer stop];
NSLog(@"stopped");
}
@end