have MBProgressHUD call a method that returns a value

Question

I would like to use MBProgressHUD with...

[HUD showWhileExecuting:@selector(fetchDomainStatus) onTarget:self withObject:nil animated:YES];

but I need to call a method (fetchDomainStatus) that returns the domainStatus (an int).

How can I do that without somekind of class variable?

Answer 1

If you can use blocks (i.e., your app is iOS 4.0+) you can do something like this, and still have all threading magic preserved:

MBProgressHUD *hud = [MBProgressHUD showHUDAddedTo:self.view animated:YES];

dispatch_async(dispatch_get_global_queue( DISPATCH_QUEUE_PRIORITY_LOW, 0), ^{
    // Do the task in the background
    int status = [self fetchDomainStatus];
    // Hide the HUD in the main tread 
    dispatch_async(dispatch_get_main_queue(), ^{
        [MBProgressHUD hideHUDForView:self.view animated:YES];
    });
});