Please read the 10.6 Foundation release notes, particularly the section entitled "Formal protocol adoption": http://developer.apple.com/mac/library/releasenotes/Cocoa/Foundation.html
We compile dual-mode code using the following: @interface Subclass : Superclass #if MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_6 <ConformingProtocol> #endif In the case of conformance to multiple protocols, some of which are unavailable pre-10.6, we use this: @interface Subclass : Superclass <Protocol1 #if MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_6 ,Protocol2 #endif > It's a mess, but it works, and the benefit of static type checking far outweighs the cost. (And it also motivates you to drop 10.5 support. :D) --Kyle Sluder _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) 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 arch...@mail-archive.com