ios - Parse JSON text in a textfield (My result is NULL) -

i making ios application communicate database via api. api sends valid json application application gives no error result: null.

here code ios app:

 // start hud  mbprogresshud *hud = [mbprogresshud showhudaddedto:self.view animated:yes];  hud.labeltext = @"zoeken...";   return true;  }      - (void)requestfinished:(asihttprequest *)request    {      [mbprogresshud hidehudforview:self.view animated:yes]; if (request.responsestatuscode == 400) {     textview.text = @"invalid code";         } else if (request.responsestatuscode == 403) {     textview.text = @"code used"; } else if (request.responsestatuscode == 204) {     textview.text = @"no content"; } else if (request.responsestatuscode == 412) {     textview.text = @"precondition failed"; } else if (request.responsestatuscode == 200) {     nsstring *responsestring = [request responsestring];     nsdictionary *responsedict = [responsestring jsonvalue];     // nsstring *naam = [responsedict objectforkey:@"deb_nr"];      nsstring *part0 = [responsedict objectforkey:@"klntnr"];     nsstring *part1 = [responsedict objectforkey:@"klntnm"];     nsstring *part2 = [responsedict objectforkey:@"adrs"];     nsstring *show = [nsstring stringwithformat:@"\r%@\r%@\r%@" , part0 , part1 , part2 ];     // if ([unlockcode compare:@"com.razeware.test.unlock.cake"] == nsorderedsame) {         textview.text = [nsstring stringwithformat:@"resultaten: %@", show];   //  } else {        // textview.text = [nsstring stringwithformat:@"resultaat: %@", unlockcode];   //  }    } else {       textview.text = @"unexpected error api error";   }  }   - (void)requestfailed:(asihttprequest *)request  {      [mbprogresshud hidehudforview:self.view animated:yes];  nserror *error = [request error];   textview.text = error.localizeddescription;   }   @end 

thanks in advance,

maurice.

it if show json string; try this

else if (request.responsestatuscode == 200) {  nserror* error; nsstring *responsestring = [request responsestring]; nsarray *responseobj = [nsjsonserialization jsonobjectwithdata: [responsestring datausingencoding:nsutf8stringencoding] options: nsjsonreadingmutablecontainers error: &error]; nsstring *part0=@""; nsstring *part1=@""; nsstring *part2=@"";  (int i=0; i<[responseobj count]; i++) {     nsdictionary *datadict = [responseobj objectatindex:i];     nsstring *part0 = [datadict objectforkey:@"klntnr"];     nsstring *part1 = [datadict objectforkey:@"klntnm"];     nsstring *part2 = [datadict objectforkey:@"adrs"]; } nsstring *show = [nsstring stringwithformat:@"\r%@\r%@\r%@" , part0 , part1 , part2 ]; textview.text = [nsstring stringwithformat:@"resultaten: %@", show]; }