Switch front/back camera with AVCaptureSession

Question

I\'m following the only answer this has on SO -

Switch cameras with avcapturesession

However cameraWithPosition does not seem to work. Deprecated?

Answer 1

Here is an example for using the switch with a video session:

.h

UIViewController

@property(nonatomic,strong)  AVCaptureSession *CaptureSession;
@property(nonatomic,strong) AVCaptureMovieFileOutput *MovieFileOutput;
@property(nonatomic,strong) AVCaptureDeviceInput *VideoInputDevice;

- (void) CameraSetOutputProperties;
- (AVCaptureDevice *) CameraWithPosition:(AVCaptureDevicePosition) Position;

Then:

.m

- (void)viewDidLoad {

   [super viewDidLoad];

   CaptureSession = [[AVCaptureSession alloc] init];

   //etc


}

- (IBAction)CameraToggle:(id)sender
{
    if ([[AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo] count] > 1)        //Only do if device has multiple cameras
    {
        NSError *error;
        //AVCaptureDeviceInput *videoInput = [self videoInput];
        AVCaptureDeviceInput *NewVideoInput;
        AVCaptureDevicePosition position = [[VideoInputDevice device] position];
        if (position == AVCaptureDevicePositionBack)
        {
            NewVideoInput = [[AVCaptureDeviceInput alloc] initWithDevice:[self CameraWithPosition:AVCaptureDevicePositionFront] error:&error];
        }
        else if (position == AVCaptureDevicePositionFront)
        {
            NewVideoInput = [[AVCaptureDeviceInput alloc] initWithDevice:[self CameraWithPosition:AVCaptureDevicePositionBack] error:&error];
        }

        if (NewVideoInput != nil)
        {
            [CaptureSession beginConfiguration];
            [CaptureSession removeInput:VideoInputDevice];
            if ([CaptureSession canAddInput:NewVideoInput])
            {
                [CaptureSession addInput:NewVideoInput];
                VideoInputDevice = NewVideoInput;
            }
            else
            {
                [CaptureSession addInput:VideoInputDevice];
            }

            //Set the connection properties again
            [self CameraSetOutputProperties];


            [CaptureSession commitConfiguration];
        }
    }
}