On Apr 12, 2010, at 1:15 PM, James Walker wrote:

> The documentation for the filters property of the CALayer class says: "Filter 
> properties should be modified by calling setValue:forKeyPath: on each layer 
> that the filter is attached to."  But I don't understand exactly how to write 
> the key path, since the filters property is an array rather than a single 
> CIFilter.  I looked through the KVC guide, and though I saw array operators 
> like @count, I couldn't find any way to just ask for item number 0 in an 
> array.


You need to assign a name to each filter, then you can create keypaths like 
@"filters.myfiltername.property".
--
David Duncan
Apple DTS Animation and Printing

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