Question

I need to record audio stream with iPhone mic.
I am using AVAudioRecorder from this thing.

I initialize AVAR in init:

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
NSString *cachePath = [[paths objectAtIndex:0] retain];
NSError *error;
BOOL isDir = NO;
if (! [[NSFileManager defaultManager] fileExistsAtPath:cachePath isDirectory:&isDir] && isDir == NO) {
    [[NSFileManager defaultManager] createDirectoryAtPath:cachePath withIntermediateDirectories:NO attributes:nil error:&error];
}

pathNewFile=  [cachePath stringByAppendingPathComponent:@"123.caf"];

NSLog(@"%@",pathNewFile);

NSDictionary *settings=[[NSDictionary alloc]initWithObjectsAndKeys:
                               [NSNumber numberWithFloat:44100.0f],AVSampleRateKey,
                                    [NSNumber numberWithInt:kAudioFormatAppleLossless],AVFormatIDKey,
                                    [NSNumber numberWithInt:1],AVNumberOfChannelsKey,
                                    [NSNumber numberWithInt:AVAudioQualityMax],AVEncoderAudioQualityKey, nil];
recorder=[[AVAudioRecorder alloc] initWithURL:[NSURL URLWithString:pathNewFile] settings:settings error:nil];
[recorder prepareToRecord];

And I start recording when user presses the rec-button:

-(void)recButton:(id)sender{
    NSLog(@"start rec");
        [rootNotesButton setTitle:@"Stop" forState:UIControlStateNormal];
            [rootNotesButton removeTarget:self action:@selector(recButton:) forControlEvents:UIControlEventTouchUpInside];
            [rootNotesButton addTarget:self action:@selector(stopButton:) forControlEvents:UIControlEventTouchUpInside];
            [recorder record];
}

-(void)stopButton:(id)sender{
            NSLog(@"stop rec");
            [rootNotesButton setTitle:@"Play" forState:UIControlStateNormal];
            [rootNotesButton removeTarget:self action:@selector(stopButton:) forControlEvents:UIControlEventTouchUpInside];
            [rootNotesButton addTarget:self action:@selector(playButton:) forControlEvents:UIControlEventTouchUpInside];
            [recorder stop];
}

-(void)playButton:(id)sender{
        NSLog(@"play rec");
            [rootNotesButton setTitle:@"Stop" forState:UIControlStateNormal];
            [rootNotesButton removeTarget:self action:@selector(playButton:) forControlEvents:UIControlEventTouchUpInside];
            [rootNotesButton addTarget:self action:@selector(stopPButton:) forControlEvents:UIControlEventTouchUpInside];

            player=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL URLWithString:pathNewFile] error:nil];
            [player play];
}

-(void)stopPButton:(id)sender{
        NSLog(@"Stop play");
            [rootNotesButton setTitle:@"Play" forState:UIControlStateNormal];
            [rootNotesButton removeTarget:self action:@selector(stopPButton:) forControlEvents:UIControlEventTouchUpInside];
            [rootNotesButton addTarget:self action:@selector(playButton:) forControlEvents:UIControlEventTouchUpInside];
            [player stop];
}

But when I try to run my project in simulator: My debugger stops on string:
recorder=[[AVAudioRecorder alloc] initWithURL:[NSURL URLWithString:pathNewFile] settings:settings error:nil]; Without any signal or error.

Answer 1

The problem seems to be with writing to cachePath in the Simulator. I tried this and it worked:

#if TARGET_IPHONE_SIMULATOR
    NSString *cachePath = @"/tmp";
#else
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
    NSString *cachePath = [[paths objectAtIndex:0] retain];
#endif

You have a couple memory leaks:

1. You are retaining cachePath but not releasing it. There’s actually no reason to retain it in the first place.

2. You are creating player with +alloc/-init in playButton which means you own it but you are not releasing it (at least not in the posted code). If you are defining it as a property you need to use self.player = … in order for it to be properly retained and released.

3. You are creating settings with +alloc/-init but not releasing it. There’s no reason to do that. You can create it like this instead:

NSDictionary *settings=[NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithFloat:44100.0f],AVSampleRateKey,
[NSNumber numberWithInt:kAudioFormatAppleLossless],AVFormatIDKey,
[NSNumber numberWithInt:1],AVNumberOfChannelsKey,
[NSNumber numberWithInt:AVAudioQualityMax],AVEncoderAudioQualityKey, nil];

You need to retain pathNewFile because stringByAppendingPathComponent returns an autoreleased string and you are using it in other methods of your class.