我学习了ios中的并发编程主题。我为多个串行调度队列做了一个示例应用程序。多个串行调度队列没有运行Concurrentl?
-(IBAction)SerialDispatchAction:(id)sender
{
s1queue = dispatch_queue_create("com.newtok.firstQueue" , NULL);
s2queue = dispatch_queue_create("com.newtok.secondQueue" , NULL);
dispatch_async(s1queue, ^{
int i=0;
while(i<5)
{
printf("First Asynchronous Dispatch Queue.....\n");
sleep(1);
i++;
}
});
dispatch_async(s2queue, ^{
int i=0;
while(i<5)
{
printf("Second Asynchronous Dispatch Queue.....\n");
sleep(1);
i++;
}
});
dispatch_sync(s1queue ,^{
int i=0;
while(i<5)
{
printf("First Synchronous Dispatch Queue.....\n");
sleep(1);
i++;
}
});
dispatch_sync(s2queue ,^{
int i=0;
while(i<5)
{
printf("Second Synchronous Dispatch Queue.....\n");
sleep(1);
i++;
}
});
}
我看了,如果你正在创建多个Dispatch串行队列,这些队列是同时运行的。我得到了这样的....
First Asynchronous Dispatch Queue.....
Second Asynchronous Dispatch Queue.....
First Asynchronous Dispatch Queue.....
Second Asynchronous Dispatch Queue.....
First Asynchronous Dispatch Queue.....
Second Asynchronous Dispatch Queue.....
First Asynchronous Dispatch Queue.....
Second Asynchronous Dispatch Queue.....
First Asynchronous Dispatch Queue.....
Second Asynchronous Dispatch Queue.....
First Synchronous Dispatch Queue.....
First Synchronous Dispatch Queue.....
First Synchronous Dispatch Queue.....
First Synchronous Dispatch Queue.....
First Synchronous Dispatch Queue.....
Second Synchronous Dispatch Queue.....
Second Synchronous Dispatch Queue.....
Second Synchronous Dispatch Queue.....
Second Synchronous Dispatch Queue.....
Second Synchronous Dispatch Queue.....
dispatch_async和dispatch_sync有什么区别? 它是如何相互压抑?