Do you need to call dispatch_group_release under ARC?

Question

On modern iOS, dispatch_queue_t values are Objective-C objects and are managed by ARC so it's not necessary to call dispatch_release on them. Is the same true for dispatch_group_t values and their corresponding dispatch_group_release call?

Be careful of what you are asking, the answer of the question in your question's title is different from the answer of the one in the body. — Pochi, Jul 22 '14 at 04:10

score 3 · Answer 1 · edited May 23 '17 at 12:09

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No, if your deployment target is iOS 6+ then you do not have to call the release function for any object managed by GCD.

This question has already been asked several times but the most complete answer is here:

Does ARC support dispatch queues?

edited May 23 '17 at 12:09

Community

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answered Jul 22 '14 at 04:07

Pochi

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score 2 · Accepted Answer · answered Jul 22 '14 at 03:59

Yes, this is true for all subclasses of dispatch_object_t including dispatch_group_t.

There is actually no dispatch_group_release call, the only C release API for these objects is dispatch_release.

See headerdoc in dispatch/object.h for more details.

Do you need to call dispatch_group_release under ARC?

2 Answers2