iOS：音频录制设置在模拟器中失败，但在我的设备上没有？

Posted 2023-02-25

【中文标题】iOS：音频录制设置在模拟器中失败，但在我的设备上没有？

【英文标题】：iOS: Audio recording setup fails in simulator, but not on my device?

【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)

【参考方案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