Re: Transition animation shows previous contents

On Fri, 11 Sep 2009 22:55:58 +0200, Christiaan Hofman <[email protected]>
said:
>I am having problems showing a transitions using CoreAnimation.
>Basically, I am doing the following:
>
>1. get a window containing a layer-hosting view (this is reused)
>2. set the animation action for "contents" of the relevant layer to nil
>3. set the contents of the layer to an initial CGImage
>4. show the window
>5. set the animation action for "contents" to a prepared CATransition
>6. set the "contents" of the layer to a final CGImage
>
>The problem is that the transition animation I get starts from the
>final image was from the /previous/ animation (or an empty image the
>first time), rather than starting with the initial image I set in step
>3.
>
>I have tried various NSView and CALayer setNeedsDisplay and display
>methods in various places, but so far without any success.
>
>Could anyone please tell me what I forget?

I don't know what you are forgetting, because I can't see your code. But
what you describe is *exactly* what I am doing in my app, as I described
here:

http://www.cocoabuilder.com/archive/message/cocoa/2009/9/15/245084

It's working fine (in 10.6 only; in 10.5 it crashes, as I have described
elsewhere). m.

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