Using objective-c blocks recursively with iOS Twitter API -

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so i'm trying use built in twitter api in ios 5 retrieve list of followers given user. in example documentation can find, requests made api passing inline blocks executed when request returns, fine of simpler stuff, when i'm trying ~1000 followers, , request returning them paged in sizes ~100, i'm stuck on how recursively call request again using 'next paging address' returned , processed inside completion block. here code:

- (void)gettwitterfollowers {     //  first, need obtain account instance user's twitter account     acaccountstore *store = [[acaccountstore alloc] init];     acaccounttype *twitteraccounttype =      [store accounttypewithaccounttypeidentifier:acaccounttypeidentifiertwitter];      //  request access user access twitter accounts     [store requestaccesstoaccountswithtype:twitteraccounttype                       withcompletionhandler:^(bool granted, nserror *error) {         if (!granted) {             // user rejected request              nslog(@"user rejected access account.");         }          else {             // grab available accounts             nsarray *twitteraccounts =              [store accountswithaccounttype:twitteraccounttype];              if ([twitteraccounts count] > 0) {                 // use first account simplicity                  acaccount *account = [twitteraccounts objectatindex:0];                  // make authenticated request our endpoint                 nsmutabledictionary *params = [[nsmutabledictionary alloc] init];                 [params setobject:@"1" forkey:@"include_entities"];                  //  endpoint wish call                 nsurl *url = [nsurl urlwithstring:@"http://api.twitter.com/1/followers.json"];                  //  build request our parameter                  request = [[twrequest alloc] initwithurl:url                                             parameters:params                                          requestmethod:twrequestmethodget];                  [params release];                  // attach account object request                 [request setaccount:account];                  [request performrequestwithhandler:^(nsdata *responsedata, nshttpurlresponse *urlresponse, nserror *error) {                     if (!responsedata) {                         // inspect contents of error                          fulllog(@"%@", error);                     }                      else {                         nserror *jsonerror;                         followers = [nsjsonserialization jsonobjectwithdata:responsedata                                                                    options:nsjsonreadingmutableleaves                                                                      error:&jsonerror];                                     if (followers != nil) {                                                       // data returned here contains next page value needed request next 100 followers,                              //what best way use this??                             fulllog(@"%@", followers);                         }                          else {                              // inspect contents of jsonerror                             fulllog(@"%@", jsonerror);                         }                     }                 }];                      } // if ([twitteraccounts count] > 0)         } // if (granted)      }];     [store release]; }

ideally i'd way listen data being returned, check next page value , if exists, reuse code block , append data returned. i', sure there must 'best-practice' way achieve this, appreciated!

to expand on @eimantas' answer, request handler expecting specific block signature, need different way handle page number.

-(void)gettwitterfollowers {     // set request...     __block int page = 0;     __block void (^requesthandler)(nsdata*, nshttpurlresponse*, nserror*) = null;     __block twrequest* request = [[twrequest alloc] initwithurl:url                                                       parameters:params                                                    requestmethod:twrequestmethodget];     requesthandler = [^(nsdata *responsedata, nshttpurlresponse *urlresponse, nserror *error) {         followers = [nsjsonserialization jsonobjectwithdata:responsedata                                            options:nsjsonreadingmutableleaves                                              error:&jsonerror];                     if (followers != nil) {                                       // process followers             page++;             nsmutabledictionary *params = [nsmutabledictionary dictionarywithdictionary:request.parameters];                // update params page number             request = [[twrequest alloc] initwithurl:url                                            parameters:params                                         requestmethod:twrequestmethodget];             [request performrequestwithhandler:requesthandler];         }      } copy];      // call block first page     [request performrequestwithhandler:requesthandler]; }

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