Re: Technology recommendations for animation/display
Re: Technology recommendations for animation/display
- Subject: Re: Technology recommendations for animation/display
- From: Kyle Sluder <email@hidden>
- Date: Mon, 26 Mar 2012 21:17:51 -0700
On Mar 26, 2012, at 8:17 PM, Kenneth Baxter wrote:
> Yes, that works if you are using pure CALayers - no problem there, but if you are using layer backed views, it doesn't work - see e.g. http://www.cocoabuilder.com/archive/cocoa/294950-problem-using-zposition-on-layer-backed-views.html
>
> ...so it still looks as if layer backed views are out…
To be clear, you can do a limited number of things with layer-backed views. You can override -makeBackingLayer, for example, and customize the view's layer's appearance.
But AppKit has its own internal understanding of zPosition that will conflict with yours when you least expect it. You _can_ safely have a layer-hosting view (call -setLayer: before calling -setWantsLayer:) as a subview of a layer-backed view (call -setWantsLayer: without calling -setLayer:). You _cannot_ have a layer-backed view as a subview of a layer-hosting view, nor should you add, remove, or manipulate the layers and sublayers of a layer-backed view.
--Kyle Sluder
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