title: how to use sendAsynchronousRequest:queue:completionHandler:
body: <p>Two part question</p>
  
  <p><strong>Part one:</strong>
  I am trying to create an ASynchronous request to my database. I am currently doing it Synchronously however I want to learn both ways to better my understanding of whats going on.</p>
  
  <p>Currently I have set up my Synchronous call like this.</p>
  
  <pre><code>- (IBAction)setRequestString:(NSString *)string
  {
      //Set database address
      NSMutableString *databaseURL = [[NSMutableString alloc] initWithString:@"http://127.0.0.1:8778/instacodeData/"]; // imac development
  
      //PHP file name is being set from the parent view
      [databaseURL appendString:string];
  
      //call ASIHTTP delegates (Used to connect to database)
      NSURL *url = [NSURL URLWithString:databaseURL];
  
      //SynchronousRequest to grab the data
      NSURLRequest *request = [NSURLRequest requestWithURL:url];
      NSError *error;
      NSURLResponse *response;
  
      NSData *result = [NSURLConnection sendSynchronousRequest:request returningResponse:&amp;response error:&amp;error];
      if (!result) {
          //Display error message here
          NSLog(@"Error");
      } else {
  
          //TODO: set up stuff that needs to work on the data here.
          NSString* newStr = [[NSString alloc] initWithData:result encoding:NSUTF8StringEncoding];
          NSLog(@"%@", newStr);
      }
  }
  </code></pre>
  
  <p>I think what I need to do is replace the call</p>
  
  <pre><code>NSData *result = [NSURLConnection sendSynchronousRequest:request returningResponse:&amp;response error:&amp;error];
  </code></pre>
  
  <p>with the ASynchronous version</p>
  
  <pre><code>sendAsynchronousRequest:queue:completionHandler:
  </code></pre>
  
  <p>however I'm not sure what to pass to queue or completionHandler... Any examples/solutions would be greatly appreciated.</p>
  
  <p><strong>Part two:</strong> 
  I have been reading about multi tasking and I would like to support it by making sure my connection requests complete if there is an interrupt. I have been following this <a href="http://mobileorchard.com/ios-advanced-programming-understanding-ios-4-multitasking/" rel="noreferrer">example</a> </p>
  
  <p>In it it explains how to gain more time if an interrupt occurs, I understand what its doing.. but not how to apply it to this connection? if you have any examples/tutorials to help me figure out how to apply it that would be awesome!</p>