I would like to realize Restful on iPad to communicate with server. I have found some open-source frameworks, like RestKit, AFNetworking which are writtern in Objective-C. But others said they are too old and writtern several years age. And now apple is targeting Swift and we should focus on some native api. So what is the best way to realize Restful on iOS now? Does apple provide native api for restful, like cocoa?