GCD 提供了同步执行任务的创建方法dispatch_sync和异步执行任务创建方法dispatch_async。 // 同步执行任务创建方法dispatch_sync(queue, ^{// 这里放同步执行任务代码});// 异步执行任务创建方法dispatch_async(queue, ^{// 这里放异步执行任务代码}); 虽然使用 GCD 只需两步,但是既然我们有两种队列(串行队列/并发...
2018-02-23 20:48:26.316956+0800 YSC-GCD-demo[20188:5059274] 3---<NSThread: 0x600000079d80>{number = 4, name = (null)} 2018-02-23 20:48:28.320660+0800 YSC-GCD-demo[20188:5059273] 4---<NSThread: 0x600000079e00>{number = 3, name = (null)} 2018-02-23 20:48:28.320649+0800 YSC...
32 33 34 35 36 /** * 异步执行 + 并发队列 * 特点:可以开启多个线程,任务交替(同时)执行。 */ - (void)asyncConcurrent { NSLog(@"currentThread---%@",[NSThread currentThread]);// 打印当前线程 NSLog(@"asyncConcurrent---begin"); dispatch_queue_t queue = dispatch_queue_create("net.bujige....
Accumulated after years of development, we have many advanced equipment, like Germany fast Trulaser3030 laser cutting, machine, CNC punch press TruPunch1000, CNC shearing machine, CNC lathe, bending machine, seam welding machine and more than one formula 1-160-1 high-end ...
Gasket is the structure of a double sealing gasket and has a signal hole. When the medium leaks first, it can be released through the signal port and solve the problem in advance, so as not to cause the mixing of the two media...
cengccsdzsftciomec1gtoiknbtwbow8cz ntiyfbblaprpbi0pwneuzofqobgycmcreyfek4eand17fk4hnxrujdh+/iwcof887a0eyjvrgec1 r87t5fd7esfonwt7npfqhxg+d17sxd4jr58pwlmapvwmu1dpwf7tz8gbm+fesuaazgsv98hywplv kpki2rgwld6wcgh6naarqgghhhjg60qjhokjuzspg+ouuwuz4vpbt8jnn9vm3b1pdc+2hxbbkj0p keljo7...
Prospects for testing the GCDM model (the graviton model of dark energy where G stands for gravitons) and comparison with the ΛCDM model are discussed. Keywords: dark energy; supernova observations; virtual gravitons Citation: Marochnik, L.S.; Usikov, D.A. Dark Energy from Virtual ...
WHITE, RAY LEWISMidAmerica
2019-08-08 14:32:59.547365+0800 YSC-GCD-demo[16332:4171500] syncConcurrent---end 从同步执行 + 并发队列中可看到: 所有任务都是在当前线程(主线程)中执行的,没有开启新的线程(同步执行不具备开启新线程的能力)。 所有任务都在打印的syncConcurrent---begin和syncConcurrent---end之间执行的(同步任务需要等...
tasks = [@[dataTasks, uploadTasks, downloadTasks] valueForKeyPath:@'@unionOfArrays.self']; } dispatch_semaphore_signal(semaphore); }]; dispatch_semaphore_wait(semaphore, DISPATCH_TIME_FOREVER); return tasks; } 下面,我们来利用 Dispatch Semaphore 实现线程同步,将异步执行任务转换为同步执行任务。