Can you tell me more about RESTKIT?

http://stackoverflow.com/questions/10643797/wait-until-multiple-operations-executed-including-completion-block-afnetworki

 

http://stackoverflow.com/questions/14956485/restkit-how-to-batch-multiple-requests-and-get-a-response-once-they-finish

 

http://restkit.org/api/master/Classes/RKObjectManager.html#//api/name/enqueueBatchOfObjectRequestOperations%3aprogress%3acompletion%3a