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我已经在 iphone 中实现了录音功能，但是在保存录音文件时遇到了问题，并且在检索录音文件时遇到了问题。

这是我的源代码

-(void)Record
{

delayTimer = [NSTimer scheduledTimerWithTimeInterval:1.0
                                                      target:self
                                                    selector:@selector(delayTimerFired:)
                                                    userInfo:nil
                                                     repeats:YES];
        //toggle = NO;
        NSMutableDictionary *rs = [[NSMutableDictionary alloc] init];
        [rs setValue:[NSNumber numberWithInt:kAudioFormatAppleIMA4] forKey:AVFormatIDKey];
        [rs setValue:[NSNumber numberWithFloat:44100.0] forKey:AVSampleRateKey];
        [rs setValue:[NSNumber numberWithInt:2] forKey:AVNumberOfChannelsKey];

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
        NSString *documentsDirectory = [paths objectAtIndex:0];


        recordedTmpFile = [[NSURL alloc] initFileURLWithPath:[NSString stringWithFormat:@"%@/Record.caf", documentsDirectory]];

        NSLog(@"%@", recordedTmpFile);

        recorder = [[AVAudioRecorder alloc] initWithURL:recordedTmpFile settings:rs error:&error];
        [recorder setDelegate:self];
        [recorder prepareToRecord];
        [recorder record];
}

和检索代码是

-(void)RetriveRecordFile
{
 NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *docDir = [paths objectAtIndex:0];

    NSFileManager *fm = [NSFileManager defaultManager];
    NSArray *contents = [fm contentsOfDirectoryAtPath:docDir error:nil];
    NSLog(@"*******%@", contents);
    NSString *fileFormat = @"caf";

    NSMutableArray *lRecord = [[NSMutableArray alloc] init];
    NSString *lRecordFile;
    for (lRecordFile in contents)
    {
        if ([[lRecordFile pathExtension] isEqualToString:fileFormat])
        {
            NSLog(@"%@", lRecordFile);
            [lRecord addObject:lRecordFile];
        }
    }
}
4

1 回答 1

1

这是用于录制音频并单击停止按钮录音机停止并存储音频文件的代码。

-(IBAction)startRecording
{ 
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:@"yyyy-MM-dd"];

NSDateFormatter *timeFormat = [[NSDateFormatter alloc] init];
[timeFormat setDateFormat:@"HH.mm.SS"];

NSDate *now = [[NSDate alloc] init];

theDate = [dateFormat stringFromDate:now];
theTime = [timeFormat stringFromDate:now];

NSString *filename =[NSString stringWithFormat:@"|%@|%@|",theDate,theTime];
theDate=[[NSString alloc]initWithString:filename];

[dateFormat release];
[timeFormat release];
[now release];

AVAudioSession *audioSession = [AVAudioSession sharedInstance];
[audioSession setCategory:AVAudioSessionCategoryRecord error:nil];

NSMutableDictionary *recordSettings = [[NSMutableDictionary alloc] initWithCapacity:10];
if(recordEncoding == ENC_PCM4)
{
    [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_AAC4): 
            formatObject = [NSNumber numberWithInt: kAudioFormatMPEG4AAC];
            break;
        case (ENC_ALAC4):
            formatObject = [NSNumber numberWithInt: kAudioFormatAppleLossless];
            break;
        case (ENC_IMA44):
            formatObject = [NSNumber numberWithInt: kAudioFormatAppleIMA4];
            break;
        case (ENC_ILBC4):
            formatObject = [NSNumber numberWithInt: kAudioFormatiLBC];
            break;
        case (ENC_ULAW4):
            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];
}
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
NSString *documentsDirectory = [paths objectAtIndex:0]; // Get documents folder
NSString *dataPath = [documentsDirectory stringByAppendingPathComponent:@"Recording"];
if (![[NSFileManager defaultManager] fileExistsAtPath:dataPath])
    [[NSFileManager defaultManager] createDirectoryAtPath:dataPath withIntermediateDirectories:NO attributes:nil error:nil]; 
NSString *filePath =[NSString stringWithFormat:@"%@/%@.caf",dataPath,theDate];

NSURL *url = [NSURL fileURLWithPath:filePath];
app.audiofilepath=filePath;
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); 
 }
}
-(IBAction)stopRecording
{
 [audioRecorder stop];
recordEncoding=1;
[recdelegate viewpic:self didSelectValue:theDate didSelectEvent:@"STOP"];
 }

----检索音频---

 -(IBAction)playRecording
 {
    AVAudioSession *audioSession = [AVAudioSession sharedInstance];
    [audioSession setCategory:AVAudioSessionCategoryPlayback error:nil];

    // NSString *docDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
    NSString *filename=theDate;
    NSString *documentsDirectory = [paths objectAtIndex:0]; // Get documents folder
    NSString *dataPath = [documentsDirectory stringByAppendingPathComponent:@"Recording"];
    if (![[NSFileManager defaultManager] fileExistsAtPath:dataPath])
        [[NSFileManager defaultManager] createDirectoryAtPath:dataPath withIntermediateDirectories:NO attributes:nil error:nil]; 
    NSString *filePath =[NSString stringWithFormat:@"%@/%@.caf",dataPath,filename];

    NSURL *url = [NSURL fileURLWithPath:filePath];
    NSError *error;
    audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:&error];
    audioPlayer.numberOfLoops = 0;
    [audioPlayer play];
  }
于 2012-05-16T10:31:24.600 回答