Question

I have data returned from a service that is rendered to my UITableView several times. I moved placed the code that populates my table in the connectionDidFinishLoading delegate. Is this the correct placement of that code?

I have a NSMutableData* receivedData; at the top of my .m file and I have implemented the correct delegates and overridden the correct methods.

I just want to know what I am missing here or what I can do to only see the data from my JSON once in the table view.

-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {    
[receivedData setLength:0];
NSLog(@"%@",response);}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
NSLog(@"Succeeded! Received %d bytes of data",[data length]);
receivedData = [[NSMutableData alloc] init];
[receivedData appendData:data];}

-(void) connectionDidFinishLoading:(NSURLConnection *)connection {
NSError *error = nil;
// Get the JSON data from the website
id result = [NSJSONSerialization JSONObjectWithData:receivedData options:kNilOptions error:&error];

if ([result isKindOfClass:[NSArray class]]) {

    for (NSArray *item in result) {
        NSArray *category = [item valueForKey:@"CategoryName"];
        [dataArray addObject:category];
    }
}
else {
    NSDictionary *jsonDictionary = (NSDictionary *)result;

    for(NSDictionary *item in jsonDictionary)
        NSLog(@"Item: %@", item);
}

[self.tableView reloadData];

NSLog(@"Finished");}

Answer 1

I believe you have a line with an error

receivedData = [[NSMutableData alloc] init];

Every time you receive the data you are initializing your object again.

I do recommend this page http://nsscreencast.com/episodes/6-afnetworking for your JSON part.