On Oct 8, 2010, at 9:18 PM, Dave Keck wrote: >> object_setIvar() takes type id. > > object_getInstanceVariable()? > > "outValue: On return, contains a pointer to the value of the instance > variable."
Don't do that. object_getInstanceVariable() and object_setInstanceVariable() still assume the ivar is of an object pointer type. Instead, use class_getInstanceVariable() and ivar_getOffset() and pointer arithmetic. Ivar ivar = class_getInstanceVariable([YourClass class], "YourIvarName"); assert(ivar); int *ivarPtr = (int *)((uint8_t *)obj + ivar_getOffset(ivar)); *ivarPtr = 42; -- 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