Threads, TableViewController, View Transition Question. iPhone

Question

In my app when a user clicks a button I want to show a loading screen, then call a method that will load the data from the network and then load a view that displays the data in a UITableView. I have everything working except showing the loading screen. (UI hangs due to the fact that the network data/parsing logic is executing) Can anyone show me how to set the network business up to run in a separate thread and when I should initiate this thread.

I have a rootViewController which deals with the transitions. A subclasses UIViewController, UIView, and a UITableViewController to deal with this view.

Answer 1

Put the background code inside of a method like:

- (void)backgroundLogic;
{
    NSAutoreleasePool *pool = [ [ NSAutoreleasePool alloc ] init ];
    // do stuff here
    [ pool release ];
}

Then display the loading screen, and then start that work in a separate thread using

[NSThread detachNewThreadSelector: @selector(backgroundLogic) toTarget: self withObject: nil];

After the background thread is finished you can dismiss the loading screen and continue with the normal flow of the application.