Best way to use RestKit in an iPhone Application

I'm the author of RestKit and we advocate using such patterns to build higher level abstractions on top of RestKit. I generally build my callbacks and such around a model object rather than creating a new LoginService type of object, but either way is fine. In my example, you would do something like:

@implementation RKUser- (void)loginWithDelegate:(NSObject<RKUserAuthenticationDelegate>*)delegate {}@end@protocol RKUserAuthenticationDelegate- (void)userDidLogin:(RKUser*)user;- (void)userDidFailLoginWithError:(RKUser*)user;- (void)userDidLogout:(RKUser*)user@end

In any case, the other thing I would recommend is changing your delegate from a retain to an assign. In your dealloc method, you can do a couple of things:

1. Nil out the delegate so you won't get crashed by a callback
2. Ask the request queue to cancel any requests: [[RKRequestQueue sharedQueue] cancelRequestsWithDelegate:self];

That's about all that you need to worry about from a memory management / house-keeping perspective. The other thing that I typically always wind up doing is creating notifications for my authentication life-cycle events. You just always wind up needing to observe them to update UI somewhere in my experience.

You are on the right track and the design is fine.

Best,Blake