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POhow to use sendAsynchronousRequest:queue:completionHandler:
 

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    <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>
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