iphone - AvAudioRecorder 设置配置帮助

Question

我想录制一个 .caf 文件，然后将其作为邮件附件发送并在我的 Mac 上获取。问题是 caf 文件不能在我的应用程序外播放，只能在我的应用程序中播放。我必须使用什么设置才能在我的 Mac 上播放 .caf 文件 whit Quicktime 这是我的设置。我将音频文件保存在 iphone Documents 目录中。

 NSDictionary *settings =[NSDictionary dictionaryWithObjectsAndKeys:
                            [NSNumber numberWithInt: kAudioFormatAppleLossless],    AVFormatIDKey,
                            [NSNumber numberWithFloat: 44100.0],                 AVSampleRateKey,
                            [NSNumber numberWithInt: 2],                         AVNumberOfChannelsKey,
                            [NSNumber numberWithInt:128000],                     AVEncoderBitRateKey,
                            [NSNumber numberWithInt: AVAudioQualityMax],         AVEncoderAudioQualityKey,
                          nil];

我正在使用外部平台发送附件，我正在将它发送到在 base 中转换的 Web 服务器

        NSString *documentsDirectory = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
    NSString *filePath2 = [documentsDirectory stringByAppendingPathComponent:@"VoiceMail.caf"];
    attachment1.FileData = [serv convertFileToB64String:filePath2 fileName:@"VoiceMail.caf"];
    attachment1.FileName = @"VoiceMail.caf";
    message.Attachments = [[NSMutableArray alloc] initWithObjects:attachment1, nil];

Answer 1

试试这个设置，应该可以。

   NSMutableDictionary* recordSetting = [[NSMutableDictionary alloc] init];

    [recordSetting setValue :[NSNumber numberWithInt:kAudioFormatLinearPCM] forKey:AVFormatIDKey]; 
    [recordSetting setValue:[NSNumber numberWithFloat:9500.0] forKey:AVSampleRateKey]; 
    [recordSetting setValue:[NSNumber numberWithInt: 2] forKey:AVNumberOfChannelsKey];
    [recordSetting setValue:[NSNumber numberWithInt:AVAudioQualityHigh] forKey:AVEncoderAudioQualityKey];
    [recordSetting setValue :[NSNumber numberWithInt:16] forKey:AVLinearPCMBitDepthKey];
    [recordSetting setValue :[NSNumber numberWithBool:NO] forKey:AVLinearPCMIsBigEndianKey];
    [recordSetting setValue :[NSNumber numberWithBool:NO] forKey:AVLinearPCMIsFloatKey];