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PONSURLConnection delegate
 

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    <p>REVISED...</p> <p>The crux of the app is communicating with a database server. Responses from the server to the app are all in XML. There are several screens. Example, screen 1 lists the user's information, screen 2 lists the user's past trades, allows new trades, and so on.</p> <p>Here is some code from my AppDelegate:</p> <pre><code>StartViewController *svc = [[StartViewController alloc] init]; TradeViewController *tvc = [[TradeViewController alloc] init]; CashViewController *cvc = [[CashViewController alloc] init]; ComViewController *covc = [[ComViewController alloc] init]; PrefsViewController *pvc = [[PrefsViewController alloc] init]; NSMutableArray *tabBarViewControllers = [[NSMutableArray alloc] initWithCapacity:5]; UITabBarController *tabBarController = [[UITabBarController alloc] init]; UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:svc]; [tabBarViewControllers addObject:navigationController]; navigationController = nil; navigationController = [[UINavigationController alloc] initWithRootViewController:tvc]; [tabBarViewControllers addObject:navigationController]; navigationController = nil; navigationController = [[UINavigationController alloc] initWithRootViewController:cvc]; [tabBarViewControllers addObject:navigationController]; navigationController = nil; navigationController = [[UINavigationController alloc] initWithRootViewController:covc]; [tabBarViewControllers addObject:navigationController]; navigationController = nil; navigationController = [[UINavigationController alloc] initWithRootViewController:pvc]; [tabBarViewControllers addObject:navigationController]; navigationController = nil; [tabBarController setViewControllers:tabBarViewControllers]; [[self window] setRootViewController:tabBarController]; self.window.backgroundColor = [UIColor whiteColor]; [self.window makeKeyAndVisible]; </code></pre> <p>Trying to stick with the MVC style, I have a singleton class which does all of the "processing".</p> <p>Now an example on how I run into a wall… the user can change their email address on screen 5. Enter new email address into text field and click the save button. The button then calls a method from the singleton class which sends the new email address to the server and (via the URL) and receives a XML response confirming the change.</p> <p>Here are my problems: 1. I start the spinner from the view controller before I make the singleton class method call - but not knowing when the app to server send/receive is finished, how do I make the spinner stop at the right time? I can't of it from the singleton class, I tried that. From what I know, it has to be from within the VC or is there a way to change VC output from my singleton class?</p> <ol> <li><p>The singleton class NSURLConnection is handling ALL of my communication. Everything from a simple, email change all the way to updating transaction tables. This just seems wrong to me and makes it very difficult to keep track on who is calling what. Again, I am going by my interpretation of MVC. I think it would be much easier to have a NSURLConnection for every VC and do some processing in those classes. However that would not be MVC(ish).</p></li> <li><p>I have close to a 100 variables, arrays, etc… in my singleton class which I use to assign values to all my VC. This also seems wrong to me but I can't think of any other way.</p></li> </ol>
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    2. COJitendra - For simplicity sake lets say I have 3 UIButtons which, when touched, have 3 unique URLs to obtain data. Data which is used to update 3 tables respectively. Do you want me to post sample code?
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