AVAudioRecorder不記錄在OS X小牛

在我的可可應用程序中，我嘗試從內部麥克風錄製聲音。我正在使用AVAudioRecorder類來達到此目的。在下面的代碼中，我設置AVAudioRecorder實例。AVAudioRecorder不記錄在OS X小牛

- (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; 
}

在優勝美地一切正常，但在小牛我沉默。系統日誌在執行時顯示錯誤[self.recorder prepareToRecord];：

AQMEIO.cpp：377 _FindIOUnit：error -66680。

這是什麼意思，我該如何解決？

來源

2015-07-10 Kit

最後我找到了答案。原因在於沙箱項目設置。我沒有在Target - > Capabilities - > App Sanbox中檢查麥克風框。優勝美地忽略了這個問題，但Maverics沒有。

來源

2015-07-16 07:23:08 Kit

AVAudioRecorder不記錄在OS X小牛

回答

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