multi thread using gcd

gistfile1.m

dispatch_async( dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
				//PUT HERE THE CODE YOU WANT TO RUN IN ANOTHER THREAD

			}
			dispatch_async( dispatch_get_main_queue(), ^{
				//PUT HERE THE BACKGROUND THREAD RESULTS FOR SHOWING THEM ON MAIN APP

			});
		});