IOS gets son from the network and resolves

nsstring* Gxurl =PURL; Gxurl= [Gxurl stringbyappendingstring:@"/index.php/api/android_getrankbyshow/eid/521"],gxurl; Nsurl* URL =[Nsurl Urlwithstring:gxurl]; NSString* Gongxian =[NSString stringwithcontentsofurl:url encoding:nsutf8stringencoding Error:nil]; NSData* data = [Gongxian datausingencoding:nsutf8stringencoding];//convert string to NSDatansdictionary*json = [nsjsonserialization jsonobjectwithdata:data options:kniloptions Error:nil];//convert NSData into a dictionary//NSLog (@ "%@", JSON);NSString* callBackData = [JSON valueforkey:@"Data"]; //NSLog (@ "%@", callbackdata);    if([callBackData isequal:@"0"])    {           }    Else{Nsmutablearray*newlist =[[Nsmutablearray alloc] init];  for(nsarray* Iteminchcallbackdata) {NSString* Nickname = [item Valueforkey:@"Nickname"]; //NSLog (@ "%@", nickname);NSString* Gongxianstr = [NSString stringWithFormat:@"%@", nickname];                                [NewList ADDOBJECT:GONGXIANSTR]; } _list=NewList;            [_devotetable Reloaddata]; }

IOS gets son from the network and resolves