iOS：音频录制设置在模拟器中失败，但在我的设备上没有？答案

【问题标题】：iOS: Audio recording setup fails in simulator, but not on my device?iOS：音频录制设置在模拟器中失败，但在我的设备上没有？
【发布时间】：2014-03-12 17:29:33
【问题描述】：

我正在我的应用程序中录制音频。该应用程序在我的带有 iOS 7 的 iPhone 5C 上运行良好，但在模拟器中失败（iPhone Retina 3.5 英寸/4 英寸/4 英寸 64 位）

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];
   }
}

在最后一行 [recorder prepareToRecord] 中失败，控制台中带有 (lldb)

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标签： ios iphone audio ios-simulator audio-recording