Check out the EDK section under the documentation. I've not used but I believe that's how they approach it. There's a sample on getting a 3rd party library working.

Hi Mita,

Great thing about StackMob, Parse & Kinvey is they all provide REST APIs so you can use Marmalades' CIwHTTP to work with them, no EDK stuff required.

Here's one of the StackMob examples to POST some data:

CIwHTTP *_pHttp = new CIwHTTP();
_pHttp->SetRequestHeader( "Accept", "application/vnd.stackmob+json; version=0" );
_pHttp->SetRequestHeader( "Content-Type", "application/json" );
_pHttp->SetRequestHeader( "Authorization", "OAuth realm=<...snip...>" );
 
static char *reqBody = (char *)"{\"content\":\"Hello Word!\"}";
 
_pHttp->Post( "http://api.mob1.stackmob.com/message", reqBody, strlen(reqBody), _httpGotHeaders, NULL );

The most challenging part was becoming familiar with CIwHTTP and json_parser (as the responses you'll get back are in JSON format).

-David