how to data fetch using json parsing in ios - iphone

Question

I am beginner of iPhone developer. I want to display data from server I have used below source code..
-(void)loadData:(id)sender
{
self.requestdata=[NSMutableData data];
NSURLRequest *request=[NSURLRequest requestWithURL:[NSURL URLWithString:kLatestKivaLoansURL]];
[[NSURLConnection alloc]initWithRequest:request delegate:self];
}
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
[requestdata setLength:0];
}
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
[requestdata appendData:data];
}
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
[connection release];
self.requestdata=nil;
}
#pragma mark-
#pragma process loan data
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
[connection release];
NSString *responsedata=[[NSString alloc]initWithData:requestdata encoding:NSUTF8StringEncoding];
self.requestdata=nil;
NSDictionary *respDict = [[responsedata JSONValue]objectForKey:#"nodes"];
NSLog(#"Response Dict:%#",respDict);
NSMutableArray *arraY = [[NSMutableArray alloc]init];
arraY = [respDict mutableCopy];
NSLog(#"My array:%#",arraY);
NSString *mystr = [[[arraY objectAtIndex:0]valueForKey:#"node"]valueForKey:#"field_company_name_value"];
NSLog(#"Mystrname:%#",mystr);
NSArray *latestLoans=[(NSDictionary *)[responsedata JSONValue]objectForKey:#"responseData"];
NSLog(#"latest_dictionary:%#",latestLoans);
DisplayViewController *disp=[[DisplayViewController alloc]init];
for (int i = 0; i< [[latestLoans valueForKey:#"entries"] count] ; i++) {
// Search *aSearches = [[Search alloc] init];
NSDictionary *tempDict = [[latestLoans valueForKey:#"entries"] objectAtIndex:i];
// disp.link=[tempDict valueForKey:#"link"];
/*link = [tempDict valueForKey:#"link"];
aSearches.title = [tempDict valueForKey:#"title"];
aSearches.description = [tempDict valueForKey:#"contentSnippet"];
[appDelegate.search addObject:aSearches];*/
[appDelegate.disparray addObject:tempDict];
}
NSLog(#"DisplayArray:%#",appDelegate.disparray);
[self.view addSubview:disp.view];
/* DisplayViewController *disp=[[DisplayViewController alloc]initWithNibName:#"DisplayViewController" bundle:nil];
[self.navigationController pushViewController:disp animated:YES];*/
}
Please give any suggestion or source code which is apply in my code

Answer 1

Take a look at AFNetworking. It will do the job for you.
There is a specific method to handle JSON operations through the class AFJSONRequestOperation
Hope it helps.

Answer 2

http://www.touch-code-magazine.com/how-to-fetch-and-parse-json-by-using-data-models/
http://blog.zachwaugh.com/post/309924609/how-to-use-json-in-cocoaobjective-c
http://www.raywenderlich.com/5492/working-with-json-in-ios-5
http://json.org/
This is great tutorial for beginner, pls read this tutorial.