On Sep 23, 2011, at 7:21 PM, Charles Srstka wrote: > On Sep 23, 2011, at 6:06 PM, Greg Parker wrote: >> >> Nib connection on iOS uses KVC. Nib connection on OS X does not use KVC >> itself, but it does use a similar "call method if it exists, set ivar >> directly if it does not" algorithm. > > But how does that work? If I make the IBOutlet an ivar, make it @private, and > have +accessInstanceVariablesDirectly return NO, trying to access this ivar > directly from another object causes a compiler error, and trying to access it > via KVC throws a “not key value coding-compliant for the key <outlet name>” > exception. Yet the nib loading mechanism is still able to set the ivar. I’ve > always been curious about why exactly this works.
On OS X, nib connection does not use KVC. Since it's not using KVC, it pays no attention to KVC machinery like +accessInstanceVariablesDirectly. The OS X nib connection implementation calls object_setInstanceVariable(). This function, like all of the runtime's introspection functions, ignores compile-time access controls. -- Greg Parker gpar...@apple.com Runtime Wrangler _______________________________________________ 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
