[Openmcl-devel] Accessing objc properties
neil.baylis at gmail.com
Sun Jul 5 17:53:11 PDT 2009
I'm trying to translate the following snippet from a working objc
program into lisp.
CALayer* lyr = [CALayer layer];
lyr.opacity = 0.5;
I think I managed to create the layer by doing:
(setf lyr (#/init (objc:make-objc-instance "CALayer")))
I'm trying to set the opacity by writing:
(setf (pref lyr :<CAL>ayer.opacity) 0.5)
> Error: Record type <CAL>AYER has no field named :OPACITY.
> Valid field names are:
> (ISA _ATTR)
> While executing: CCL::%FIND-FOREIGN-RECORD-TYPE-FIELD, in process
What's the correct way for me to set this property? Why would it be
saying that CALayer has no such field?
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