how to use sendAsynchronousRequest:queue:completionHandler:

Question

Two part question

Part one: I am trying to create an ASynchronous request to my database. I am currently doing it Synchronously however I want to le

Answer 1

I have been working on a similar problem, I posted this question and got a clear answer here, I hope that helps with Part 2.

For part 1 what the others mentioned here are good but you need to add another check (I have modified an answer below). It is possible that your request will return say a 404 Error (page not found) in which case you will not get and error and data will be > 0. The 200 is a good response, you could also check the StatusCode for 404 or whatever.

     [NSURLConnection
     sendAsynchronousRequest:urlRequest
     queue:[[NSOperationQueue alloc] init]
     completionHandler:^(NSURLResponse *response,
                         NSData *data,
                         NSError *error) 
    {
    NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *)response;
     if ([data length] >0 && error == nil && [httpResponse statusCode] == 200)
     {

                    // DO YOUR WORK HERE

     }