Re: CALayer drawing "transition" effect?

• Subject: Re: CALayer drawing "transition" effect?
• From: Joseph Kelly <email@hidden>
• Date: Thu, 31 Jul 2008 14:15:03 -0700
• Delivered-to: email@hidden
• Delivered-to: email@hidden

On Jul 31, 2008, at 11:07 AM, Jens Alfke wrote:

The content of a layer is an animatable property, so by default, changing the content will do a crossfade. It seems that applies to custom content (drawn by -drawInContext:) as well as the "content" property.

There are a couple ways to suppress animations. You can use the CAContext API to disable all animations while you make your changes, or you can use the layer's "actions" dictionary to override the animation for the content transition.

Thanks!

- (id<CAAction>)actionForKey:(NSString *)event
{
	if ([event isEqualToString:@"contents"])
		return nil;
	return [super actionForKey:event];
}

Joe K.
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