TCMCamera.m

- (void)viewDidLoad {
  [super viewDidLoad];

  [self setSession:[[AVCaptureSession alloc] init]];
	[_session setSessionPreset:AVCaptureSessionPresetHigh];
  [self setViewLayer:self.vPreview.layer];
  
  
  [self setCaptureVideoPreviewLayer:[[AVCaptureVideoPreviewLayer alloc] initWithSession:_session]];
  [_captureVideoPreviewLayer setFrame:[_vPreview bounds]];
  
  if ([_captureVideoPreviewLayer isOrientationSupported]) {
    [_captureVideoPreviewLayer setOrientation:AVCaptureVideoOrientationPortrait];
  }
  
  [_captureVideoPreviewLayer setVideoGravity:AVLayerVideoGravityResizeAspectFill];
  
  [_vPreview.layer addSublayer:_captureVideoPreviewLayer];
  
  [self setDevice:[AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo]];
  
  NSError *error = nil;
	[self setInput:[AVCaptureDeviceInput deviceInputWithDevice:_device error:&error]];
	if (!_input) {
		NSLog(@"ERROR: trying to open camera: %@", error);
	}
  
  [_session addInput:_input];
  [self setStillImageOutput:[[AVCaptureStillImageOutput alloc] init]];
  
  NSDictionary *outputSettings = [[NSDictionary alloc] initWithObjectsAndKeys: AVVideoCodecJPEG, AVVideoCodecKey, nil];
  [_stillImageOutput setOutputSettings:outputSettings];
  [_session addOutput:_stillImageOutput];
  
  
	[_session startRunning];
  
}