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  • Record a sound in iOS

    @anoop.kumar
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    To record the sound in ios we can use the code below:-

    To record the sound first set the delegate of AVAudioRecorder in AudioRecorderViewController.h File like

    1. #import "AudioRecorderViewController.h"

    @interface AudioRecorderViewController : UIViewController<AVAudioRecorderDelegate>

    1. @interface AudioRecorderViewController : UIViewController<AVAudioRecorderDelegate>


    This will be implemented in  "AudioRecorderViewController.m" file

    1. AVAudioRecorder *_voicerecorder;
    2.  
    3. AVAudioSession *audioSession = [AVAudioSession sharedInstance];
    4.     NSError *err = nil;
    5.     [audioSession setCategory :AVAudioSessionCategoryPlayAndRecord error:&err];
    6.     if(err)
    7.     {
    8.         NSLog(@"audioSession: %@ %ld %@", [err domain], (long)[err code], [[err userInfo] description]);
    9.         return;
    10.     }
    11.     [audioSession setActive:YES error:&err];
    12.     err = nil;
    13.     if(err)
    14.     {
    15.         NSLog(@"audioSession: %@ %ld %@", [err domain], (long)[err code], [[err userInfo] description]);
    16.         return;
    17.     }
    18.     
    19.    NSMutableDictionary  _recorderSettings = [[NSMutableDictionary alloc] init];
    20.     [_recorderSettings setValue :[NSNumber numberWithInt:kAudioFormatLinearPCM] forKey:AVFormatIDKey];
    21.     [_recorderSettings setValue:[NSNumber numberWithFloat:44100.0] forKey:AVSampleRateKey];
    22.     [_recorderSettings setValue:[NSNumber numberWithInt: 2] forKey:AVNumberOfChannelsKey];
    23.     [_recorderSettings setValue :[NSNumber numberWithInt:16] forKey:AVLinearPCMBitDepthKey];
    24.     [_recorderSettings setValue :[NSNumber numberWithBool:NO] forKey:AVLinearPCMIsBigEndianKey];
    25.     [_recorderSettings setValue :[NSNumber numberWithBool:NO] forKey:AVLinearPCMIsFloatKey];
    26.     _audioFileName = @"Sound";
    27.     _recorderFilePath = [NSString stringWithFormat:@"%@/%@.wav", DOCUMENTS_FOLDER, _audioFileName] ;
    28.     NSURL *url = [NSURL fileURLWithPath:_recorderFilePath];
    29.     err = nil;
    30.     _voicerecorder = [[ AVAudioRecorder alloc] initWithURL:url settings:_recorderSettings error:&err];
    31.     if(!_voicerecorder){
    32.         NSLog(@"recorder: %@ %ld %@", [err domain], (long)[err code], [[err userInfo] description]);
    33.         [self showAlert:[err localizedDescription]] ;
    34.         return;
    35.     }
    36.     
    37.     [_voicerecorder setDelegate:self];
    38.     [_voicerecorder prepareToRecord];
    39.     _voicerecorder.meteringEnabled = YES;
    40.     BOOL audioHWAvailable = audioSession.inputAvailable;
    41.     if (! audioHWAvailable) {
    42.         NSLog(@"input Hardware not supported");
    43.         
    44.         return;
    45.     }
    46.     
    47.     // start recording
    48.     
    49.     [_voicerecorder record];

     

    if you want to stop the recording then Use the code below

    1. [_voicerecorder stop];

    Here is the delegate method of the voiceRecorder that notifiy that the recording is successFull or not.
     

    1. - (void)audioRecorderDidFinishRecording:(AVAudioRecorder *) aRecorder successfully:(BOOL)flag
    2. {
    3.    if(flag){
    4.  
    5. NSLog(@"Recording finish success'");
    6. } else{
    7.  
    8. NSLog(@"Recording finish fail'");
    9. }  
    10. }

     

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