If you want to test if a dictionary is immutable, you are almost certainly doing it wrong. When passed a dictionary in to a method either:
A) Make a mutable copy if that's what you need B) -copy it if you want it to be immutable. (This is not inefficient as it sounds because immutable objects implement -copy to do a -retain and return self instead) On 14 Jan 2011, at 10:48, Tito Ciuro wrote: > Hello, > > Trying to determine whether an NSDictionary is mutable or not fails with > these two tests: > > // Variable info could be NSDictionary or NSMutableDictionary. Assume it's an > NSDictionary. > > BOOL isKindOfClass = [info isKindOfClass:[NSMutableDictionary class]]; > BOOL respondsToSelector = [info > respondsToSelector:@selector(setObject:forKey:)]; > > After executing the above statements, both variables 'isKindOfClass' > and'respondsToSelector' are set to YES. > > When I obtain the class type of 'info', I get: > > (gdb) po [info class] > NSCFDictionary > > The question is: if 'info' is an immutable dictionary, why is isKindOfClass > and respondsToSelector telling me that it is mutable? > > Thanks, > > -- Tito > _______________________________________________ > > 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/cocoadev%40mikeabdullah.net > > This email sent to cocoa...@mikeabdullah.net _______________________________________________ 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
