UIApplication *application = [UIApplication sharedApplication];
NSArray *subviews = [[[application valueForKey:@"statusBar"] valueForKey:@"foregroundView"]subviews];
NSNumber *dataNetWorkItemView = nil;
for (id subView in subviews) {
　　if ([subView isKindOfClass:[NSClassFromString(@"UIStatusBarDataNetworkItemView") class]]) {
      dataNetWorkItemView = subView;
      break;
    }
  }
  NetWorkType networkType = NetWorkType_None;
  switch ([[dataNetWorkItemView valueForKey:@"dataNetworkType"] integerValue]) {
    case 0:
      NSLog(@"No wifi or cellular");
      networkType = NetWorkType_None;
      break;      
    case 1:
      NSLog(@"2G");
      networkType = NetWorkType_2G;
      break;      
    case 2:
      NSLog(@"3G");
      networkType = NetWorkType_3G;
      break;     
    default:      
      NSLog(@"Wifi");
      networkType = NetWorkType_WIFI;
      break;
  }
return networkType;   

struct sockaddr_in zeroAddress;
 bzero(&zeroAddress, sizeof(zeroAddress));
 zeroAddress.sin_len = sizeof(zeroAddress);
 zeroAddress.sin_family = AF_INET;
 SCNetworkReachabilityRef defaultRouteReachability = SCNetworkReachabilityCreateWithAddress(NULL, (struct sockaddr *)&zeroAddress); //创建测试连接的引用：
 SCNetworkReachabilityFlags flags;
 SCNetworkReachabilityGetFlags(defaultRouteReachability, &flags);
if ((flags & kSCNetworkReachabilityFlagsReachable) == 0) 
 {
   return NetWorkType_None;  
 }
 NetWorkType retVal = NetWorkType_None;
 if ((flags & kSCNetworkReachabilityFlagsConnectionRequired) == 0)
 {
   retVal = NetWorkType_WIFI;
 }
 if ((((flags & kSCNetworkReachabilityFlagsConnectionOnDemand ) != 0) ||  
    (flags & kSCNetworkReachabilityFlagsConnectionOnTraffic) != 0))
 {
   if ((flags & kSCNetworkReachabilityFlagsInterventionRequired) == 0) 
   {
  retVal = NetWorkType_WIFI;  
   }
 }
 if ((flags & kSCNetworkReachabilityFlagsIsWWAN) == kSCNetworkReachabilityFlagsIsWWAN)
 {
   if((flags & kSCNetworkReachabilityFlagsReachable) == kSCNetworkReachabilityFlagsReachable) {
     if ((flags & kSCNetworkReachabilityFlagsTransientConnection) == kSCNetworkReachabilityFlagsTransientConnection) {
       retVal = NetWorkType_3G;
       if((flags & kSCNetworkReachabilityFlagsConnectionRequired) == kSCNetworkReachabilityFlagsConnectionRequired) {
         retVal = NetWorkType_2G;
       }
     }
   }
 }
 return retVal; 

NSBundle *b = [NSBundle bundleWithPath:@"/System/Library/PrivateFrameworks/SoftwareUpdateServices.framework"];
   if ([b load]) {
    // load Class from STRING
   SUNetworkMonitor *networkMonitor = [SUNetworkMonitor sharedInstance];
     int netType = [networkMonitor currentNetworkType];
     NetWorkType networkType = NetWorkType_None;
     switch ( netType ) {
       case 0:
         NSLog(@"No wifi or cellular");
         networkType = NetWorkType_None;
         break;
       case 1:
         NSLog(@"WIFI");
         networkType = NetWorkType_WIFI;
        break;
       case 2:
         NSLog(@"2G");
         networkType = NetWorkType_2G;
        break;        
       case 3:
         NSLog(@"3G");
         networkType = NetWorkType_3G;
         break;
       default:
         break;
    }<br>
    return networkType;
  }
  return NetWorkType_None;