任何问题记得抓包
sudo tcpdump -A -s 0 -i en4 host 10.28.2.207
mknetwork cache
[Reachability reachabilityWithHostname:self.hostName];
operation cancel
[self.reachability currentReachabilityStatus]
sudo tcpdump -A -s 0 -i en4 host 10.28.2.207
mknetwork cache
[Reachability reachabilityWithHostname:self.hostName];
operation cancel
[self.reachability currentReachabilityStatus]