Async.OC:Objective-C中的语法糖，用于Grand Central Dispatch中的异步调度

异步OC 用Objective-C重写 。 要获得对iOS 7和OS X 10.9的支持，请查看 。 异步糖看起来像这样： Async.background(^{ NSLog ( @" A: This is run on the background " ); }).main(^{ NSLog ( @" B: This is run on the , after the previous block " ); }); 代替熟悉的GCD语法： dispatch_async (dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0 ), ^{ NSLog ( @" A: This is run on the background " ); dispatch_async ( dis