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Completion block using GCD

原文 2012-12-09 15:37:42 5 1 iphone/ ios/ ios5/ grand-central-dispatch/ nsoperationqueue

I am developing an app that requires a completion block and a "barrier" functionality. As far as I know, NSOperation API has a completionBlock property and GCD API has the dispatch_barrier_(a)sync function to handle the barrier needs.

What should I do in order to accomplish both of the needs? Thanks!

1 answers

dispatch_group should have all the pieces you need. Just dispatch_group_async/dispatch_group_enter for your work units, then dispatch_group_notify for your completion handler.

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Related Question How can I run code block in background periodically using GCD? Cancel GCD block working in thread Returning a Value that is Set in a GCD Block Completion block/callback on FetchRequest completion how to make one by one completion of methods using block? Creating the loop using GCD Using GCD in iOS call presentModalViewController in block completion Calling a GCD Block else where in Main Thread Stuttering when Drawing to Image in GCD Block

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Completion block using GCD

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1 answers

solution1 1 ACCPTED 2012-12-09 17:13:33

solution1
1 ACCPTED 2012-12-09 17:13:33