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Editorial Team
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Asked: 2026-06-12T15:20:04+00:00

I have objects that extends NSOperation. I also have NSOperationQueue. I have a timer

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I have objects that extends NSOperation.
I also have NSOperationQueue.

I have a timer that NSLogs operationCount property of that NSOperationQueue every 0.5 seconds.

I add new operations to queue and after all of them are finished, queue logs 0 just as expected.

Problem is that Instruments reports that there are still living NSOperation objects living.

I hold no references to NSOperation, I only alloc-init them and add them to the queue.

The number of living NSOperation objects is 11 (???) in Instruments. If I add 5 new operations, NSLog logs 5… 4…. 3…. 2 …. 1… 0.
And instruments are behaving like: 16, 15, 14, 13, 12, 11 …

Any clue on this?

I could KVO isFinished property and set to nil, but I am I wonder why are those objects still alive.

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1 Answer

  1. Editorial Team

    It looks like Instruments were causing this since this is not happening anymore and I didn’t touch that code before this new tests.

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