多线程理解

//采用系统的方式添加串行的任务
- (IBAction)SerialMainAction:(UIButton *)sender {
//    系统提供的串行队列其实就是主线程队列
//    1拿到主线程
    dispatch_queue_t main = dispatch_get_main_queue();
//    2给主线程队列添加任务
    dispatch_async(main, ^{
        NSLog(@"omg%@",[NSThread currentThread]);
    });
    dispatch_async(main, ^{
        NSLog(@"two%@",[NSThread currentThread]);
    });
    dispatch_async(main, ^{
        NSLog(@"three%@",[NSThread currentThread]);
    });
    dispatch_async(main, ^{
        NSLog(@"four%@",[NSThread currentThread]);
    });
    dispatch_async(main, ^{
        NSLog(@"five%@",[NSThread currentThread]);
    });
    
}

//采用自定义的方式添加串行任务
- (IBAction)SerialBySelfAction:(UIButton *)sender {
    //创建串行队列
    dispatch_queue_t serialQueue = dispatch_queue_create("yan5", DISPATCH_QUEUE_SERIAL);
//    2添加任务
    dispatch_async(serialQueue, ^{
        NSLog(@"one%@",[NSThread currentThread]);
    });
    dispatch_async(serialQueue, ^{
        NSLog(@"two%@",[NSThread currentThread]);
    });
    dispatch_async(serialQueue, ^{
        NSLog(@"three%@",[NSThread currentThread]);
    });
    dispatch_async(serialQueue, ^{
        NSLog(@"four%@",[NSThread currentThread]);
        
    });
    dispatch_async(serialQueue, ^{
        NSLog(@"five%@",[NSThread currentThread]);
    });
    
    
    
}