Leave message to Drupal 7 with iPhone app

How to leave message to an article in Drupal 7 with iPhone app (iOS 4.3)? Any connector 开发者_C百科from D7 I can use in iOS SDK ?

The Drupal Services module provides endpoints via XMLRPC/JSON-RPC/etc. to perform many core functions remotely (including adding comments to nodes). As far as I know that's currently the only option available without having to write a connector yourself.