ios - iOS:模拟器中的音频录制设置失败，但我的设备上没有？

Question

我正在我的应用程序中录制音频。
该应用程序可以在装有iOS 7的iPhone 5C中正常运行，但在模拟器中无法运行(iPhone Retina 3,5英寸/ 4英寸/ 4英寸/ 64英寸)

这是设置音频的代码:

-(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带有(lldb)的 [recorder prepareToRecord]中失败

Answer 1

我认为问题可能是ios模拟器不支持麦克风:

Is it possible to record actual sound on the simulator using mic

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