ios - completion handler in method which request information from server -

i have method send request server , have created call function completionhandler follows:

-(void)sendaddsubscriptionrequest:(nsstring*)owner withcomppletionhandler:(void (^)(bool, nsarray *, nserror *))completion    datawebservice = [[nsmutabledata alloc] init];     nsurl* aurl = [nsurl                    urlwithstring:[nsstring stringwithformat:@"https://www.google.com/add?"]];      nsmutableurlrequest* request =     [nsmutableurlrequest requestwithurl:aurl                             cachepolicy:nsurlrequestuseprotocolcachepolicy                         timeoutinterval:30.0];             [request addvalue:[nsstring stringwithformat:@"bearer %@", "token"]    forhttpheaderfield:@"authorization"];      [request sethttpmethod:@"post"];     nsstring* postdata =     [[nsstring alloc] initwithformat:@"owner=%@",      owner];     [request sethttpbody:[postdata datausingencoding:nsutf8stringencoding]];             nsdata* returndata = [nsurlconnection sendasynchronousrequest:request queue:nil completionhandler:^(nsurlresponse *response, nsdata *data, nserror *connectionerror) {      }; 

my problem how should return completion handler function after data fetched.

thanks,.

as sending asynchronous request, method return data "returned" in nsurlconnection completion handler. can decode there , pass along own completion handler:

[nsurlconnection sendasynchronousrequest:request                                    queue:nil                        completionhandler:^(nsurlresponse *response, nsdata *data, nserror *connectionerror) {     nsarray *array = nil;     if (!connectionerror)         array = /* data somehow */     completion(!connectionerror, array, connectionerror); }]; 

note: it's not clear completion handler parameters mean, might have taken liberties.