Premature exit from dispatch_asycn , Grand Central Dispatch..
Lets say i am running some code in dispatch async. .. is there a way to terminate the thread it creates before it completes? like when the user clicks cancel dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{ //start doing something here.. break bofore it finishes? dispatch_async(dispatch_get_ma...