AVCaptureVideoPreviewLayer smooth orientation rotation

Question

I\'m trying to disable any discernable orientation rotation to an AVCaptureVideoPreviewLayer while still maintaining rotation for any subviews. AVCaptureVideoPreviewLayer does h

Answer 1

I wanted the AVCaptureVideoPreviewLayer to handsomely follow all rotations. This is how I did it (overlayView is just a view that happens to have the correct bounds). It only animates without a hick-up when you place your calls to super exactly where they are in the code:

- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration
{
    [super willRotateToInterfaceOrientation:toInterfaceOrientation duration:duration];

    if ([[[self previewLayer] connection] isVideoOrientationSupported])
    {
        [[[self previewLayer] connection] setVideoOrientation:toInterfaceOrientation];
    }
}

- (void) willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration
{
    CGRect layerRect = [[self overlayView] bounds];
    [[self previewLayer] setBounds:layerRect];
    [[self previewLayer] setPosition:CGPointMake(CGRectGetMidX(layerRect),
                                                 CGRectGetMidY(layerRect))];

    [super willAnimateRotationToInterfaceOrientation:toInterfaceOrientation duration: duration];
}