NSProgressIndicator not showing progress

Question

I have a for loop running on my main runloop. I'm trying to have a progress indicator to show what's happening. The problem is the UI never gets a chance to be updated.

I've looked at NSProgressIndicator progress with For loops? but I can't use their solution. My for loop must be on the main thread - otherwise other parts of my program must be serial to the for loop.

Any ideas on how to force a redraw of the indicator?

Answer 1

Send your progress indicator a displayIfNeeded message (a method of NSView).