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Newbie question: How do I keep animations going NSProgressIndicator...



Below is a snippit of code.  I want he progress indicator to keep
"spinning" while it sorts the list.  As is, it stops as soon as it
hits the [dll ****sort] method call.

- (IBAction)sort:(id)sender
{
	[sortingIndicator startAnimation:self];
	[sortingIndicator displayIfNeeded];
	NSDate * now = [NSDate date];
	switch ([whichSort selectedTag]) {
		case 0: 
			[dll selectionSort];
			break;
		case 1: [dll insertionSort];
			break;
		case 2: [dll mergeSort];
			break;
		default: [dll quickSort];
			break;
	}
	float secs = -1.0 * (float)[now timeIntervalSinceNow];
	
	[elapsedTime setFloatValue: secs];	
	[sortingIndicator stopAnimation:self];
	//[dll printList];
}

Thanks.
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