When to dispatch_release()?

问题

I'm fairly new to GCD and was trying to find an answer to this. Assuming I have the following code:

dispatch_queue_t queue = dispatch_queue_create("queue", NULL);
dispatch_async(queue, ^{
    // do some stuff
});

Where in the code should I release the queue? Inside or outside the block?

回答1:

Outside the block. I'm fairly certain you don't have to wait for the async block to finish as GCD will retain the queue.

来源：https://stackoverflow.com/questions/4842460/when-to-dispatch-release