ios - JSON parsing: show data on UITableView -

this given api have parse.i have show name on uitableview. want fetch value of name n show on table view. code:

- (nsinteger)tableview:(uitableview *)tableview numberofrowsinsection:(nsinteger)section {      return [ episodes count]; } - (uitableviewcell *)tableview:(uitableview *)tableview cellforrowatindexpath:(nsindexpath *)indexpath {     static nsstring *simpletableidentifier = @"simpletableitem";      uitableviewcell *cell = [tableview dequeuereusablecellwithidentifier:simpletableidentifier];      if (cell == nil) {         cell = [[uitableviewcell alloc] initwithstyle:uitableviewcellstyledefault reuseidentifier:simpletableidentifier];     }      cell.textlabel.text = [[ episodes objectatindex:indexpath.row] objectforkey:@"names"];       return cell; } - (void)tableview:(uitableview *)tableview didselectrowatindexpath:(nsindexpath *)indexpath {      uialertview *logoutconfirm = [[uialertview alloc]initwithtitle:@"toilet finder" message:@"" delegate:self cancelbuttontitle:nil otherbuttontitles:@"display on map",@"route",@"cancel", nil];     logoutconfirm.tag = 111;     [logoutconfirm show];  }  - (void) parsejsonwithurl:(nsurl *) jsonurl  {     dispatch_queue_t queue = dispatch_get_global_queue(dispatch_queue_priority_background, 0);     [uiapplication sharedapplication].networkactivityindicatorvisible = yes;  dispatch_async(queue, ^{         nserror *error = nil;      nsstring *json = [nsstring stringwithcontentsofurl:jsonurl                                                encoding:nsasciistringencoding error:&error];      if (error == nil){          webinserve=@"http://api.kivaws.org/v1/loans/search.json?status=fundraising";         nslog(@"url %@", webinserve);          nsurl *final_url = [nsurl urlwithstring:webinserve];           nsdata*   jsondata = [nsdata datawithcontentsofurl: final_url];            nserror* error;           jsondict = [nsjsonserialization jsonobjectwithdata:jsondata options:kniloptions error:&error];          nslog(@"what contain let me check %@",jsondict);          nsarray* latestloans = [jsondict objectforkey:@"loans"];           nslog(@"loans in array: %@", latestloans);             episodes = [[jsondict valueforkey:@"latestloans"]valueforkey:@"name"];                    if (error == nil)          {              dispatch_async(dispatch_get_main_queue(), ^{                  [uiapplication sharedapplication].networkactivityindicatorvisible = no;                   episodes = [[jsondict valueforkey:@"latestloans"]valueforkey:@"name"];                  [tableview reloaddata];              });          } 

i have tried using:

episodes = [[jsondict valueforkey:@"latestloans"]objectforkey:@"name"]; 

i have used several tymes objectforkey , valueforkey in above code , in

cell.textlabel.text = [[ episodes objectatindex:indexpath.row] objectforkey:@"names"]; 

line of code in cellforrowatindexpath: method

but data not displayed on tableview...indeed displayed on nslog...

why using dispatch_queues instead of using dedicated async api of nsurlconnection?

as explained in apple's concurrency programming guide, when there dedicated api execute task in concurrent manner, avoid make own concurrent version wrapping synchronous call (like +[nsstring stringwithcontentofurl:] in case) inside asynchronous queues (like dispatch_async on concurrent queue in case).

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moreover, latestloans variable (which nslog) extracts content key called @"loans", in next line when try extract episodes, extract dictionary assumed associated @"latestloans" key. there discrepancy in code there, isn't it? that's main problem in code.

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and use valueforkey: (which generic key-value-coding method works using introspection, not @ dedicated nsdictionary-specific method) instead of objectforkey: (which need use when accessing objects nsdictionary).

sure valueforkey: work objectforkey: being dedicated method nsdictionary more efficient. prefer new "objective-c modern notation" object literals, namely dict[key] compiler translate objectforkey: automatically (this [] notation syntaxic sugar more concise)

so here comes code suggestion:

... [nsurlconnection sendasynchronousrequest:request queue:[nsoperationqueue mainqueue] completionhandler:^(nsurlresponse* resp, nsdata* jsondata, nserror* err) {   ...   nsdictionary* jsondict = [nsjsonserialization jsonobjectwithdata:jsondata options:kniloptions error:&error];   nsarray* latestloans = jsondict[@"loans"];   self.episodes = latestloans[@"name"];   [self.tableview reloaddata]; }];