在我写的viewdidload中
- (void)viewDidLoad { [super viewDidLoad]; NSURL *url = [NSURL fileURLWithPath:@"/dev/null"]; NSDictionary *settings = [NSDictionary dictionaryWithObjectsAndKeys: [NSNumber numberWithFloat: 44100.0],AVSampleRateKey,[NSNumber numberWithInt: kAudioFormatAppleLossless],AVFormatIDKey,[NSNumber numberWithInt: 1],AVNumberOfChannelsKey,[NSNumber numberWithInt: AVAudioQualityMax],AVEncoderAudioQualityKey,nil]; NSError *error; recorder = [[AVAudioRecorder alloc] initWithURL:url settings:settings error:&error]; if (recorder) { [recorder preparetoRecord]; recorder.meteringEnabled = YES; [recorder record]; levelTimer = [NSTimer scheduledTimerWithTimeInterval:0.03 target:self selector:@selector(levelTimerCallback:) userInfo:nil repeats:YES]; } else { NSLog(@"%@",[error description]); } }
另一种实现方法是
- (void)levelTimerCallback:(NSTimer *)timer { [recorder updateMeters]; const double ALPHA = 0.05; double peakPowerForChannel = pow(10,(0.05 * [recorder peakPowerForChannel:0])); lowPassResults = ALPHA * peakPowerForChannel + (1.0 - ALPHA) * lowPassResults; if (lowPassResults < 0.95) NSLog(@"Mic blow detected"); else NSLog(@"Person spoked"); }
当我使用我的Mac麦克风在模拟器上运行我的代码时,它可以工作,当我说话时,它会出现“人员说话”的情况,但是当我在真正的IOS设备上运行我的应用程序时,虽然我已经打开了它但它没有检测到任何声音在“设置”中为我的应用程序启用microPhone
我该怎么办?
解决方法
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