标签：
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(networkStateChange) name:kReachabilityChangedNotification object:nil];
self.conn = [Reachability reachabilityForInternetConnection];
[self.conn startNotifier];
标签：
原文地址：http://www.cnblogs.com/zhenghuadong/p/5123573.html
