On 18 Nov 2010, at 13:01, jonat...@mugginsoft.com wrote: > > On 18 Nov 2010, at 12:35, Remco Poelstra wrote: > >> Hi, >> >> I've a object like to following: >> @interface <Proto> { >> NSMutableArray *items; >> } >> @property (nonatomic,readonly) NSMutableArray *items; >> @end >> >> I also have a protocol as follows: >> @protocol Proto >> @property (nonatomic,readonly) NSArray *items; >> @end >> >> I of course want the items to be read only for the outside world, but the >> object itself should be able to modify it. Now the compiler complains about >> the properties not matching. How should I solve this? Make a custom getter >> that returns an immutable array? Make the property refer to a mutable array? >> Make the property an immutable array and make copies of the array while >> modifying it? >> Any insight would be appreciated. >> > > Define a class extension (an unnamed category) within your implementation .m > file: > > @interface <Proto> () > @property (nonatomic. readwrite) NSMutableArray *items; > @end > > Your object will have readwrite access. > > See http://www.friday.com/bbum/2009/09/11/class-extensions-explained
Sorry. Wrong answer. Didn't read the question properly. Don't make items a property if you don't want to advertise it to the outside world. I would have a custom getter called items which returns [items copy]. When you modify items raise manual KVO notifications to inform observers of your changes. Jonathan_______________________________________________ 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