It has long been my understanding that in order to keep a GUI from
freezing in Cocoa during LONG methods you have to create a
NSOperationQueue and load the method as a NSInvocationOperation as seen
here:

- (IBAction)launchBigTask:(id)sender
{
        NSInvocationOperation* theOp = [[NSInvocationOperation alloc]
initWithTarget:self selector:@selector(myBigMethod:) object:nil];

        [myOpQueue addOperation:theOp];
}

-----------------

I was looking at another developers (Drew
McCormick)(http://www.macresearch.org/node/4567) code recently in a
scientific multi-processing example, and he seems to achieve the same GUI
independence without launching a NSInvocationOperation?

-----------------Why doesn't his GUI lock?

If I could duplicate this it would allow me to us NSOperationQueue to
multi-process a critical loop in my code, and then issue the
waitUntilAllOperationsAreFinished to wait for those ops to finish before
loading a shared array with new data and running loop again .

Is there another way to keep GUI active?

Thankyou,

Ron Jurincie



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