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Double camera output in iOS

Asked by At

I want to make twin screen using built-in camera on iOS

I tried following code, but it shows just one view.

It's a natural result, I know.

Here's the code what I used..

- (void)prepareCameraView:(UIView *)window
    AVCaptureSession *session = [[AVCaptureSession alloc] init];
    session.sessionPreset = AVCaptureSessionPresetMedium;

    CALayer *viewLayer = window.layer;
    NSLog(@"viewLayer = %@", viewLayer);

    AVCaptureVideoPreviewLayer *captureVideoPreviewLayer = [[AVCaptureVideoPreviewLayer alloc] 
    captureVideoPreviewLayer.frame = window.bounds;
    [window.layer addSublayer:captureVideoPreviewLayer];    
    AVCaptureDevice *captureDevice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];

    NSError *error = nil;
    AVCaptureDeviceInput *input = [AVCaptureDeviceInput deviceInputWithDevice:captureDevice error:&error];
    if (!input) 
        NSLog(@"ERROR : trying to open camera : %@", error);

    [session addInput:input];

    [session startRunning];

How can I get double screen on iOS?

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