How to stop current NSOperation?

objective-c macos cocoa nsoperation nsoperationqueue
User1234 picture User1234 · Oct 19, 2011 · Viewed 9.1k times · Source

I'm using NSOperationQueue, and NSOperation for running some function on background click. But I want to be able, when user clicks some button, stop that Operation.

How can I do it?

Something like, [currentoperation stop];
Cancel - won't work me. I want to stop immediately.

Thanks

Answer

Mike Weller picture Mike Weller · Oct 19, 2011

You should be calling the -cancel method, and the operation itself has to support being cancelled by monitoring the isCancelled property/keypath and safely stopping when its value becomes YES. If the NSOperation is your own, you will probably have to create a custom subclass to implement this functionality. You cannot (safely) force an arbitrary operation to immediately stop. It has to support being cancelled.

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