iOS：模擬器中的音頻錄制設置失敗，但是我的設備上沒有？

Question

我正在我的應用程序中錄制音頻。 該應用程序可以在裝有iOS 7的iPhone 5C中正常運行，但在模擬器中無法運行（iPhone Retina 3,5英寸/ 4英寸/ 4英寸/ 64英寸）

這是設置音頻的代碼：

-(void)setupAudio{
    _audioMessageLabel.text = @"...Bereit für Aufnahme...";
    [_stopButton setEnabled:NO];
    [_playButton setEnabled:NO];

    // Set the audio file
    NSString *guid = [[NSUUID new] UUIDString];
    _dateiName = [NSString  stringWithFormat:@"audio-notiz-%@.m4a", guid];
    NSLog(@"dateiName: %@", _dateiName);
    NSArray  *pathComponents = [NSArray  arrayWithObjects:
                            [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject],
                            _dateiName,
                            nil];
    _outputFileURL = [NSURL  fileURLWithPathComponents:pathComponents];

    // Setup audio session
    AVAudioSession *session = [AVAudioSession sharedInstance];
    [session setCategory:AVAudioSessionCategoryPlayAndRecord error:nil];

    // 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

    NSError *error = nil;

    recorder = [[AVAudioRecorder alloc] initWithURL:_outputFileURL settings:recordSetting error:&error];

    if (error)
    {
        NSLog(@"error: %@", [error localizedDescription]);

    } else {
        recorder.delegate = self;
        recorder.meteringEnabled = YES;
        [recorder prepareToRecord];
   }
}

它在控制台的最后一行[recorder prepareToRecord]帶有（lldb）失敗

Answer 1

我認為問題可能是ios模擬器不支持麥克風：

是否可以使用麥克風在模擬器上錄制實際聲音

https://developer.apple.com/library/ios/documentation/IDEs/Conceptual/iOS_Simulator_Guide/TestingtheiOSSimulator/TestingtheiOSSimulator.html#//apple_ref/doc/uid/TP40012848-CH4-SW1