title: NSURLConnection delegate methods not being called
body: <p>I'm trying to use the delegate methods of NSURLConnection.
  The following methods are currently not being called:</p>
  
  <pre><code>- (void)connectionDidFinishLoading:(NSURLConnection *)connection;
  
  - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data;
  
  - (void)connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge;
  //I also want to be able to use self-signed https urls
  
  - (BOOL)connection:(NSURLConnection *)connection canAuthenticateAgainstProtectionSpace:(NSURLProtectionSpace *)protectionSpace;
  //I also want to be able to use self-signed https urls
  </code></pre>
  
  <p>I'm currently using a synchronous call but asynchronous seems better because after I complete the code base I'm going to implement it into an iPhone application and I can't have my ui freezing.</p>
  
  <p>With the following method<code>responseData = [NSMutableData dataWithData:[NSURLConnection sendSynchronousRequest:request returningResponse:&amp;response error:&amp;error]];</code> </p>
  
  <p>I get back the data I need but using asynchronous I seems I have to use the delegate methods to get data back. I tried to add the delegate by using <code>@interface myClass : NSObject&lt;NSURLConnectionDelegate&gt;</code></p>
  
  <p>I'm calling my method as follows:</p>
  
  <pre><code>-(void)grabData{
      NSArray* array = [NSArray arrayWithObjects:@"auth.login",@"user",@"pass", nil];
      NSData* packed_array = [array messagePack];
  
      NSURL* url = [NSURL URLWithString:@"https://192.168.1.115:3790/"];
      NSMutableURLRequest* request = [[[NSMutableURLRequest alloc]initWithURL:url]retain];
      [request setHTTPMethod:@"POST"];
      [request setValue:@"RPC Server" forHTTPHeaderField:@"Host"];
      [request setValue:@"binary/message-pack" forHTTPHeaderField:@"Content-Type"];
      [request setValue:[NSString stringWithFormat:@"%d",[packed_array length]] forHTTPHeaderField:@"Content-Length"];
      [request setHTTPBody:packed_array];
  
      //NSHTTPURLResponse *response = nil;
      NSError *error = nil;
  
      NSLog(@"connecting");
      NSURLConnection* connection = [[[NSURLConnection alloc]initWithRequest:request delegate:self]retain];
      if (connection) {
          NSLog(@"connection exists");
          self.responseData = [[NSMutableData data]retain];
      }
      else {
          NSLog(@"Connection doesn't exist?");
      }
      NSLog(@"response data: %@",[responseData messagePackParse]);
      NSLog(@"error: %@",error);
  }
  </code></pre>
  
  <p>I've attempted the following:</p>
  
  <pre><code>NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
  [connection start];
  </code></pre>