addSublayer over video preview in OSX - macos

Question

I'm trying to add a simple text label over a video preview. The video preview works fine, but the text label is no where to be found. The compiler isn't giving me any errors or warnings either. I know I'm mixing dot notation in there, but I'm not sure if that's my root cause or not.
This is a clip from my .m file:
#interface AVRecorderDocument ()
#property (retain) AVCaptureVideoPreviewLayer *previewLayer;
#property (nonatomic, strong) NSTextField *labelVideoOverlay;
#end
- (void)windowControllerDidLoadNib:(NSWindowController *) aController
{
CALayer *previewViewLayer = [[self previewView] layer];
self.labelVideoOverlay = [[NSTextField alloc] initWithFrame:CGRectMake(100, 120, 200, 40)];
self.labelVideoOverlay.stringValue = #"TEST";
self.labelVideoOverlay.backgroundColor = [NSColor blackColor];
self.labelVideoOverlay.textColor = [NSColor whiteColor ];
[previewViewLayer setBackgroundColor:CGColorGetConstantColor(kCGColorBlack)];
AVCaptureVideoPreviewLayer *newPreviewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:[self session]];
[newPreviewLayer setFrame:[previewViewLayer bounds]];
[newPreviewLayer setAutoresizingMask:kCALayerWidthSizable | kCALayerHeightSizable];
[previewViewLayer addSublayer: self.labelVideoOverlay.layer];
[previewViewLayer addSublayer:newPreviewLayer];
[self setPreviewLayer:newPreviewLayer];
[newPreviewLayer release];
}

Answer 1

It looks like although you've added the video preview as a sublayer, you still need to add the overlay as a subview to your main view. I did something similar like this recently (just with an UIImageView), but the principal should still be the same.
self.overlayImageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"overlaygraphic.png"]];
self.overlayImageView.translatesAutoresizingMaskIntoConstraints = NO;
[[self view] addSubview:self.overlayImageView];
So, you could do something like:
self.labelVideoOverlay = [[NSTextField alloc] initWithFrame:CGRectMake(100, 120, 200, 40)];
self.labelVideoOverlay.stringValue = #"TEST";
self.labelVideoOverlay.backgroundColor = [NSColor blackColor];
self.labelVideoOverlay.textColor = [NSColor whiteColor ];
[[self view] addSubview:self.labelVideoOverlay];