Difference between Post & Get method in Json Parsing in ios -

i implement json parsing follow:

-(void)getallevent {             sbjson *json = [sbjson new];     json.humanreadable = yes;     responsedata = [[nsmutabledata data] retain];      nsstring *service = @"/getallvenue";      nsstring *str;     str = @"calagary";     nsstring *requeststring = [nsstring stringwithformat:@"{\"cityname\":\"%@\"}",str];      //nslog(@"request string:%@",requeststring);      //    nsstring *requeststring = [nsstring stringwithformat:@"{\"getalleventsdetails\":\"%@\"}",service];     nsdata *requestdata = [nsdata datawithbytes: [requeststring utf8string] length: [requeststring length]];      nsstring *fileloc = [[nsbundle mainbundle] pathforresource:@"urlname" oftype:@"plist"];     nsdictionary *filecontents = [[nsdictionary alloc] initwithcontentsoffile:fileloc];     nsstring *urlloc = [filecontents objectforkey:@"url"];     urlloc = [urlloc stringbyappendingstring:service];     //nslog(@"url : %@",urlloc);      nsmutableurlrequest *request = [[nsmutableurlrequest alloc] initwithurl: [nsurl urlwithstring: urlloc]];       nsstring *postlength = [nsstring stringwithformat:@"%d", [requestdata length]];     [request sethttpmethod: @"post"];     [request setvalue:postlength forhttpheaderfield:@"content-length"];     [request setvalue:@"application/json" forhttpheaderfield:@"content-type"];     [request sethttpbody: requestdata];      //    self.connection = [nsurlconnection connectionwithrequest:request delegate:self];        nserror *resperror = nil;     nsdata *returndata = [nsurlconnection sendsynchronousrequest: request returningresponse: nil error: &resperror ];      if (resperror)      {         nsstring *msg = [nsstring stringwithformat:@"connection failed! error - %@ %@",                          [resperror localizeddescription],                          [[resperror userinfo] objectforkey:nsurlerrorfailingurlstringerrorkey]];            uialertview *alertview = [[uialertview alloc] initwithtitle:@"check network connection"  message:msg delegate:self cancelbuttontitle:@"ok"                                                    otherbuttontitles:nil];         [alertview show];         [alertview release];      }      else     {         nsstring *responsestring = [[nsstring alloc] initwithdata:returndata encoding: nsutf8stringencoding];          nsdictionary *results = [[responsestring jsonvalue] retain];         //nslog(@" %@",results);         nsstring *extractusers = [[results objectforkey:@"d"] retain];         nsdictionary *finalresult = [[extractusers jsonvalue] retain];         nslog(@"final results : %@",finalresult);         listofevents = [finalresult objectforkey:@"list of event details of given venue"]; 

}

using code, slow down app. how can parse json in background? *is right post method? difference between post & method?*

is there other way json parsing?

you using synchronous request executed on main thread if need in background use asynchronous loading.

post method: post method generates form collection, sent http request body. values typed in form stored in form collection.

get method: method sends information appending url (with question mark) , stored querystring collection. querystring collection passed server name/value pair. length of url should less 255 characters.

an http request client server, asking resource.  http post upload of data (form information, image data, whatever) client server. 

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