Question

在我的可可应用中，我尝试从内置麦克风录制声音。我正在使用AVAudioRecorder类来实现此目的。在下面的代码中，我设置了AVAudioRecorder实例。

- (void)setupAudioRecorder {

    NSMutableDictionary *recordSettings = [NSMutableDictionary dictionary];

    recordSettings[AVFormatIDKey] = @(kAudioFormatLinearPCM);
    recordSettings[AVSampleRateKey] = @(16000.0);
    recordSettings[AVNumberOfChannelsKey] = @(1);
    recordSettings[AVLinearPCMBitDepthKey] = @(16);
    recordSettings[AVLinearPCMIsBigEndianKey] = @(NO);
    recordSettings[AVLinearPCMIsFloatKey] = @(NO);

    recordSettings[AVEncoderBitRateStrategyKey] = AVAudioBitRateStrategy_Variable;
    recordSettings[AVEncoderAudioQualityForVBRKey] = @(AVAudioQualityMedium);
    recordSettings[AVSampleRateConverterAlgorithmKey] = AVSampleRateConverterAlgorithm_Mastering;

    recordSettings[AVSampleRateConverterAudioQualityKey] = @(AVAudioQualityMedium);

    NSString *file = [[NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)
                   objectAtIndex:0]
                  stringByAppendingPathComponent:@".recorder_voice.caf"];

    NSFileManager *fm = [NSFileManager defaultManager];

    if ([fm fileExistsAtPath:file])
        [fm removeItemAtPath:file error:nil];

    NSURL *url = [NSURL fileURLWithPath:file];
    NSError *err = nil;

    self.recorder.delegate = nil;
        self.recorder = [[AVAudioRecorder alloc] initWithURL:url
                                            settings:recordSettings
                                               error:&err];
    if(!self.recorder){
    // show error
    }

    [self.recorder setDelegate:self];
    [self.recorder prepareToRecord];

    self.recorder.meteringEnabled = YES;
}

在优胜美地，一切正常，但在小牛队，我已经沉默了。执行 [self.recorder prepareToRecord]; 时，系统日志显示错误：

AQMEIO.cpp：377 _FindIOUnit：错误-66680。

这是什么意思，我该如何解决？

Answer 1

最后我找到了答案。原因是在沙箱项目设置中。我没有检查Target中的麦克风盒 - ＆gt;能力 - ＆gt; App Sanbox。约塞米蒂忽略了这个问题，但Maverics没有。

AVAudioRecorder不会在OS X Mavericks上录制

1 个答案: