
//子线程 dispatch_async(dispatch_get_global_queue(0, 0), ^{ }); //回到主线程 dispatch_async(dispatch_get_main_queue(), ^{ });
//子线程 dispatch_async(dispatch_get_global_queue(0, 0), ^{ }); //回到主线程 dispatch_async(dispatch_get_main_queue(), ^{ });
遇见资源网 objective-c 开一个子线程和开一个主线程 http://www.ox520.com/18037.html