UIInterfaceOrientation is Landscape but UIView is still on Portrait mode

Question

I'm developing an iOS app with latest SDK.

I'm developing an camera app which only supports LandscapeRight orientation.

On Main ViewController I have added a UIView for AVCaptureVideoPreviewLayer. In other words, main ViewController I have main view, and another view, called videoPreviewView, for AVCaptureVideoPreviewLayer.

I set up AVCaptureVideoPreviewLayer on viewWillAppear: method:

- (void) viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
    [self setUpVideo];
}

- (void)setUpVideo
{
    NSLog(@"Set up video");
    if (DataExchanger.cameraManager != nil)
    {
        UIView *view = [self videoPreviewView];
        CALayer *viewLayer = [view layer];
        [viewLayer setMasksToBounds:YES];

        AVCaptureVideoPreviewLayer *newCaptureVideoPreviewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:DataExchanger.cameraManager.captureSession];
        CGRect bounds = [view bounds];
        NSLog(@"BOUNDS: %@", NSStringFromCGRect(bounds));

        [newCaptureVideoPreviewLayer setFrame:bounds];
        [newCaptureVideoPreviewLayer setVideoGravity:AVLayerVideoGravityResizeAspectFill];

        [viewLayer insertSublayer:newCaptureVideoPreviewLayer below:[[viewLayer sublayers] objectAtIndex:0]];
    }
}

I get this log:

BOUNDS: {{0, 0}, {320, 480}}

But UIInterfaceOrientation is UIInterfaceOrientationLandscapeRight and with that orientation I would get these values:

BOUNDS: {{0, 0}, {480, 320}}

And another problem is that I see video rotated -90 degrees.

I have found this stackoverflow question, but - (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation method is never triggered.

What's happening? How can I solved this problem?

Answer 1

1. The default AVCaptureVideoPreviewLayer object orientation is landscape!
2. The orientation of the AVCaptureVideoPreviewLayer does not change with the orientation of the device. You have to change it manually.
3. To change it manually, you need to call the connection of the preview layer and rotate it:

iOS6:

 AVCaptureConnection *previewLayerConnection=self.newCaptureVideoPreviewLayer.connection;
 if ([previewLayerConnection isVideoOrientationSupported])
   [previewLayerConnection setVideoOrientation:AVCaptureVideoOrientationLandscapeRight];

< iOS6:

if ([self.newCaptureVideoPreviewLayer isOrientationSupported])   
[self.newCaptureVideoPreviewLayer setOrientation:AVCaptureVideoOrientationLandscapeRight];