On Sep 3, 2010, at 10:36 AM, Markus Spoettl wrote:

> I have delegate-drawn layers (on the main thread) whose content I want to 
> change without animation, I don't want to a change transition of any kind in 
> some situations. Up until now I'm using this:


If you want to have a layer that doesn't animate (crossfade) content changes, 
then set the layer's actions dictionary like so:

layer.actions = [NSDictionary dictionaryWithObject:[NSNull null] 
forKey:@"contents"];

This will prevent animation of the "contents" property. There are a lot of 
other ways to do this too, I would recommend you read the documentation for 
-[CALayer actionForKey:] for more details.
--
David Duncan

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