Disabling auto rotation for a UIView

Question

My application is composed of a toolbar and an AVCaptureVideoPreviewLayer in a background UIView. I\'d like to see that toolbar rotate regarding the device orientation, so in my

Answer 1

This post pointed in the right direction. To get an AVCaptureVideoPreviewLayer to not rotate with the device I wrapped it in a UIView and animated that view in the opposite direction:

- (void) willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration {

    float rotation;

    if (toInterfaceOrientation==UIInterfaceOrientationPortrait) {
        rotation = 0;
    } else
    if (toInterfaceOrientation==UIInterfaceOrientationLandscapeLeft) {
        rotation = M_PI/2;
    } else
    if (toInterfaceOrientation==UIInterfaceOrientationLandscapeRight) {
        rotation = -M_PI/2;
    }

    [UIView animateWithDuration:duration animations:^{
        cameraPreview.transform = CGAffineTransformMakeRotation(rotation);
        cameraPreview.frame = self.view.frame;
    }];
}

It seems a little roundabout but it animates smoothly. Other views on top of the preview layer automatically rotate as they should.