How to keep a CALayer at the same position while resizing the parent NSView?

Imagine a small red box (CALayer instance) drawn in the lower left corner of its parent layer (which is the root layer of a layer hosting NSView).

When the frame of the parent view changes, the red box should remain at the same position on the screen. I do this by adjusting it's position relative to the lower left corner of the parent view .

The problem is that in some cases there is flickering and I can see the red box layer being drawn in the lower left corner of the extended frame before it is shown at the correct position.

I assumed that wrapping the frame and position change into one CATransaction would make both changes together, but that doesn't always work (the docs say that by using a transaction the animations will start at the same time, but there still seems to be a race condition at times).

How can I adjust the frame of the parent NSView while keeping the child layer at its perceived position?

Example and code:

My own ideas:

1. Hide red box layer, update the p开发者_运维百科osition, show it again

2. Use constraints to bind it to the right corner. Problem is that this offset could also change and I would have to update the constraint which could lead to the same flickering issue.

Try deleting the code you have already made to have the layer move with the view and put this where you are creating the layer.

boxLayer.autoresizingMask = kCALayerMaxXMargin | kCALayerMinYMargin;