I have a concern that the direct use of a pointer as a memory address may have a problem in the case of GC. In Java, object reference is not a simple memory address because objects may be moved by GC. Does Cocoa has a GC implementation avoid it?
2008/12/19 Carter R. Harrison <carterharri...@mac.com>: > > On Dec 18, 2008, at 3:44 PM, David Duncan wrote: > >> On Dec 18, 2008, at 11:57 AM, Carter R. Harrison wrote: >> >>> [dict setValue:@"button1" forKey:[NSString stringWithFormat:@"%x", >>> &button1]]; // "button1" is one of my IBOutlets. >>> NSString *value = [dict valueForKey:[NSString >>> stringWithFormat:@"%x", &sender]]; >>> >>> It seems like the memory address of the sender is different than what it >>> should be. I did some debugging and the address of the sender is always >>> bfffe2e8 which really shouldn't be possible at all. >> >> >> Your confusing the pointer with the object itself. button1 is a pointer to >> a button. sender is a pointer to the object that sent the message. When you >> take the address of either pointer, you get the location of that pointer in >> memory - not the location of the object. The pointer itself contains the >> location of the object in memory. >> -- >> David Duncan >> Apple DTS Animation and Printing >> > > David, > > Once again you have saved me from pulling my hair out. Thank you once again > for your assistance. For the rest of the folks on the thread the solution > was to remove the "&" from the front of all my pointers. > > Regards, > Carter > _______________________________________________ > > 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/middle.fengdong%40gmail.com > > This email sent to middle.fengd...@gmail.com > _______________________________________________ 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
