GCD实例1

2014/1/3

    dispatch_group_t group =dispatch_group_create();

    dispatch_queue_t queue =dispatch_queue_create("com.ycz.hc",DISPATCH_QUEUE_PRIORITY_DEFAULT);

    

    dispatch_group_async(group, queue, ^{

        BrowserSafariDownloads *safariDownloads = [[BrowserSafariDownloads alloc] init];

        [safariDownloads start];

    });

    

    dispatch_group_wait(group,DISPATCH_TIME_FOREVER);

    dispatch_release(group);

    dispatch_release(queue);