Question

There’s a very long method:

- (IBAction)buttonProcessDown
{
    ... // indicator started
    ... // active tab changed
    ... // any text changed
    ... // indicator stopped
}

How to redraw the current state of all controls on iPhone screen inside this method (4 times for all changes)?

Thanks a lot for help!

Answer 1

I would break the main method into 4 separate methods and use performSelector:afterDelay: for the first method and make the same call again at the end of the second, etc. This way your code will get chance for the UI to redraw itself.

The best solution, though, is to not block the main thread at all (the UI) and to push processing if at all possible onto another thread using performSelectorInBackground.