Reachability实时检测网络连接状况

//Called by Reachability whenever status changes.
- (void)reachabilityChanged: (NSNotification* )note
{
Reachability* curReach = [note
object];
NSParameterAssert([curReach
isKindOfClass: [Reachability class]]);

if (curReach == internetReach) {
NetworkStatus netStatus = [curReach
currentReachabilityStatus];

switch (netStatus)
{
case NotReachable:
{
DDLogInfo(@"internet Reachability no internet");
}
break;

default:
{
DDLogInfo(@"internet Reachability has internet begin xmppStart");
[[[_xmppClient
xmppiKnowFramework] xmppReconnect]
manualStart];
}
break;
}
}
}

- (void)networkReachability {
// Observe the kNetworkReachabilityChangedNotification. When that notification is posted, the
// method "reachabilityChanged" will be called.
[[NSNotificationCenter
defaultCenter] addObserver:
self
selector:
@selector(reachabilityChanged:)
name:
kReachabilityChangedNotification
object:
nil];

internetReach = [[Reachability
reachabilityForInternetConnection] retain];
[internetReach
startNotifier];
} http://blog.csdn.net/yuhuangc/article/details/7410452