macOS Cocoa cancel operation/method

[wesg]

I'm writing a Cocoa Obj-C application that has a single operation. It will work through a loop (for or while) in a single window.

I've gotten the interface working, but I'm stuck as to how best to implement a "cancel operation" button. What sort of code would I need to cancel the method that is started by the "DO work" button? Is there a single cancel operation that I can implement?

 

[Cromulent]

Some semi psuedo code.

while(doWork == true)
{
     // do stuff

    if(cancelButton == true)
    {
          doWork = false;
    }
}

 

[Catfish_Man]

That would only work if you're doing the work on a background thread, since it'll never receive the cancel event if you're blocking the UI. If you aren't threading, you'd probably want to divide the work into bite-sized chunks and set a 0 delay timer to execute the next chunk each time one finishes so that the runloop has a chance to process events. Or use NSOperationQueue (which is equivalent to the background thread idea, but maybe easier to manage).