AVAudioRecorder cannot save to file - ios

Question

I am trying to create a Simple AVAudioRecorder wrapper.
As far as I know, after [recorder stop], the audio file will save to the path automatically.
However in my class, it won't save to the path.
Console log:
2014-01-23 15:34:55.754 AudioRecorderDemo[4496:60b] contentURL: file:///var/mobile/Applications/C20F5A5A-14A9-45D4-80A3-999976AC4055/Documents/MyAudio-someDemo.m4a
2014-01-23 15:34:55.756 AudioRecorderDemo[4496:60b] fileExist? : no
Thanks for helping.
The class file on GitHub:
AudioRecorder.h
AudioRecorder.m
// Code when start:
-(void)prepare
{
NSError *error;
// Setup audio session
AVAudioSession *session = [AVAudioSession sharedInstance];
[session setCategory:AVAudioSessionCategoryPlayAndRecord error:&error];
if (error)
{
NSLog(#"Error in AVAudioSession: %#", error.description);
return;
}
// 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
NSURL *contentURL = [STLAudioRecorder contentsOfURLFromUniqueID:self.uniqueID fileNameFormat:self.fileNameFormat];
self.recorder = [[AVAudioRecorder alloc] initWithURL:contentURL settings:recordSetting error:&error];
if (error)
{
NSLog(#"Error in AVAudioRecorder: %#", error.description);
return;
}
self.recorder.delegate = self;
self.recorder.meteringEnabled = YES;
[self.recorder prepareToRecord];
}
-(void)startRecording
{
if (!self.recorder) [self prepare];
if (!self.recorder.isRecording)
{
AVAudioSession *session = [AVAudioSession sharedInstance];
[session setActive:YES error:nil];
[self.recorder record];
NSLog(#"startRecording, url: %#", self.recorder.url.absoluteString);
}
}
// Code when stop:
-(void)stopRecording
{
if (self.recorder && self.recorder.isRecording)
{
NSError *error;
[self.recorder stop];
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
[audioSession setActive:NO error:&error];
if (error) NSLog(#"Error in stopRecording: %#", error.description);
}
else
{
NSLog(#"stopRecording: !(self.recorder && self.recorder.isRecording)");
}
}

Answer 1

Try this one,
-(void) initAudioSession {
AVAudioSession * audioSession = [AVAudioSession sharedInstance];
[audioSession setCategory:AVAudioSessionCategoryPlayAndRecord error: &error];
[audioSession setActive:YES error: &error];
}
-(void) recordStart {
NSArray *dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *docsDir = [dirPaths objectAtIndex:0];
tempFilePath = [NSURL fileURLWithPath:[docsDir stringByAppendingPathComponent:[NSString stringWithFormat: #"%#.%#",audioFileName, #"caf"]]];
NSMutableDictionary* recordSetting = [[NSMutableDictionary alloc] init];
[recordSetting setValue :[NSNumber numberWithInt:kAudioFormatAppleIMA4] forKey:AVFormatIDKey];
[recordSetting setValue:[NSNumber numberWithFloat:44100.0] forKey:AVSampleRateKey];
[recordSetting setValue:[NSNumber numberWithInt: 2] forKey:AVNumberOfChannelsKey];
stringByAppendingPathComponent: [NSString stringWithFormat: #"%#.%#",audioFileName, #"caf"]]];
recorder = [[ AVAudioRecorder alloc] initWithURL:tempFilePath settings:recordSetting error:&error];
[recorder setDelegate:self];
[recorder prepareToRecord];
[recorder record];
}
-(void) stopRecording{
[recorder stop];
}
-(void) playRecord{
avPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:tempFilePath error:&error];
[avPlayer prepareToPlay];
[avPlayer play];
}