Here's the current status. I seem to have everything working, partly
due to you guys. Thanks. However, now having analyzed this thing to death,
I'm filing a bug report.
First a summary of the (extended) problem. The view is layer hosted.
Its layer has a sublayer called "content", which has sublayers, one of which
is A, which is to be transitioned to B. This is akin to a
PowerPoint/Keynote slide transition. Layers A and B also have sublayers,
A1, A2, etc., which transition in al la "build" in PP.
According to the docs, using [content addAnimation:trans
forKey:kCATransition] should have worked for slide transitions. It didn't.
However, using the delegate method, augmented by an ivar enable flag, did
work.
Next, tried the delegate method for builds. Didn't work. It
transitioned in the entire layer stack (all sublayers of A or B) instead of
the single inserted layer. So I went back to using [B addAnimation:trans
forKey:kCAOnOrderIn] for builds. That worked properly.
None of this makes any sense, other than the build-transitions being one
level deeper in the hierarchy than the side transitions.
Definition of "software development": A series of experiments,
hopefully culminating in the desired result.
On 11/16/09 2:02 PM, "cocoa-dev-requ...@lists.apple.com"
<cocoa-dev-requ...@lists.apple.com> wrote:
>
> On Mon, Nov 16, 2009 at 11:01 AM, Matt Neuburg <m...@tidbits.com> wrote:
>> Nothing here "runs contrary to the documentation." We're now talking apples
>> and oranges. The "key" used in addAnimation:forKey: (such as kCATransition)
>> has nothing whatever to do with the "key" that arrives in
>> actionForLayer:forKey:. They both happen to be called "key" but that's all.
>> The former, as I explained in my previous message, is just an arbitrary
>> name, which is used just in case you need to call removeAnimationForKey:
>> later, and for no other purpose. The latter is the name of a CALayer
>> animatable property; that property is changing, and you are now being asked
>> whether to animate that property.
>
> You have it backwards. kCATransition is documented to be sent as the
> action identifier to -actionForLayer:forKey: whenever the sublayer
> tree changes. Instead, CA is only sending @"sublayers". This is
> incorrect.
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