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Re: any other type of value for the "fromValue" property of CAAnimation?

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Re: any other type of value for the "fromValue" property of CAAnimation?

Subject: Re: any other type of value for the "fromValue" property of CAAnimation?
From: David Duncan <email@hidden>
Date: Fri, 11 Jul 2008 14:41:12 -0700

On Jul 11, 2008, at 5:38 AM, Cloud Strife wrote:

I am wondering whether I could set this property to NSColor or CGColor inorder to change the layer color dynamically. For example, If I want to change a Green layer to a red one from time to time, could anyone give me a guidance?

CGColorRefs are Core Foundatation data types, and therefore analogous to NSObject decedents, thus you can typecast a CGColorRef to an id and assign it as a fromValue or toValue of a CAAnimation without needing to do any kind of conversion. Note however that NSColor and CGColorRef are NOT toll-free bridged, therefore it is an error to assign an NSColor where a CGColorRef is expected (or vise versa). -- David Duncan Apple DTS Animation and Printing email@hidden

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  >any other type of value for the "fromValue" property of CAAnimation? (From: "Cloud Strife" <email@hidden>)




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