摘要： dispathc_apply 是dispatch_sync 和dispatch_group的关联API.它以指定的次数将指定的Block加入到指定的队列中。并等待队列中操作全部完成. NSArray *array = [NSArray arrayWithObjects:@"/Users/chentao/Desktop/copy_res/gelato.ds", @"/Users/chentao/Desktop/copy_res/jason.ds", @"/Users/chentao/Desktop/copy... 阅读全文

摘要： dispatch_sync(),同步添加操作。他是等待添加进队列里面的操作完成之后再继续执行。 dispatch_queue_t concurrentQueue = dispatch_queue_create("my.concurrent.queue", DISPATCH_QUEUE_CONCURRENT); NSLog(@"1"); dispatch_sync(concurrentQueue, ^(){ NSLog(@"2"); [NSThread sleepForTimeInterval:10]; NSLog(@"3&q 阅读全文

摘要： 先看段代码 dispatch_queue_t concurrentQueue = dispatch_queue_create("my.concurrent.queue", DISPATCH_QUEUE_CONCURRENT); dispatch_async(concurrentQueue, ^(){ NSLog(@"dispatch-1"); }); dispatch_async(concurrentQueue, ^(){ NSLog(@"dispatch-2"); }); dispatch_barrier_async(concu.. 阅读全文