On Feb 1, 2010, at 00:10:11, Roland King wrote: > Because NSDictionary requires keys to be copyable because it copies them > (it's in the documentation). Use a CFDictionary() instead, you can set it up > to retain the keys and do what you want.
Oh! I thought NSDictionary and CFDictionary were the same thing under the hood. > > Rick Mann wrote: >> I'd like to use a CALayer object as a key in a dictionary. The reason is >> that when my app detects a hit in a layer, I need to quickly determine which >> object I've associated with it. Since I can't store a reference to an >> arbitrary object in the CALayer, a dictionary seems to be the most expedient >> way to do that. >> Unfortunately, I can't seem to add my layer as the key (it fails with >> "-[CALayer copyWithZone:]: unrecognized selector sent to instance >> 0x50132a0"). It's really pretty handy to be able to use any object as a key, >> why is this not the case in Obj-C? >> TIA, >> Rick >> _______________________________________________ >> Cocoa-dev mailing list ([email protected]) >> Please do not post admin requests or moderator comments to the list. >> Contact the moderators at cocoa-dev-admins(at)lists.apple.com >> Help/Unsubscribe/Update your Subscription: >> http://lists.apple.com/mailman/options/cocoa-dev/rols%40rols.org >> This email sent to [email protected] _______________________________________________ Cocoa-dev mailing list ([email protected]) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [email protected]
