CFSocketSetSocketFlags作用是?
CFSocketSetSocketFlags(_socket, (CFSocketGetSocketFlags(_socket) & ~kCFSocketAutomaticallyReenableReadCallBack & ~kCFSocketAutomaticallyReenableWriteCallBack) | kCFSocketAutomaticallyReenableDataCallBack);
设置flags的作用是什么?是和哪个回调函数有关系?该设置影响什么?