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Re: Strange flipping bug in Core Animation?
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Re: Strange flipping bug in Core Animation?


  • Subject: Re: Strange flipping bug in Core Animation?
  • From: Matt Long <email@hidden>
  • Date: Thu, 7 Aug 2008 15:49:52 -0600

When you call addSubLayer, you are in essence telling the layer to animate so any properties you changed in the layer will animate after adding the layer. You are doing this in your awakeFromNib which is likely why you don't see the animation when it runs--not sure though. You might want to hook it to a button click instead to see it run after everything has loaded.

It might help if you explain what you are trying to do. It's not clear from your code.

-Matt


On Aug 7, 2008, at 3:53 AM, Moray Taylor wrote:

Dear list,

I first posted this to the quartz list, but I'm starting to think I'm the only person on it, some hopefully a Cocoa list reader can help...

I think I've stumbled upon a bug/undocumented feature in Core Animation, I've made a quick app to demonstrate the issue.

http://s3.amazonaws.com/TempStuff/LayerDebug.zip

Once the app runs, make sure you are in 'tab1', you can resize the window, scroll around, all is well (apart from the disappearing blue sublayer, but lets ignore that for now, unless anyone knows how to fix this?)

You switch to 'tab2' and back again, fine.

BUT, if I switch to 'tab2', resize the window (even a 1 pixel tweak), then go back to 'tab1', the layers are now upside down!

I want to use Core Anim in a shipping app, but obviously cannot until I sort this out, so I'd really appreciate any input.

Cheers

Moray





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