AFNetwork

//设置网络监听

• (void)monitorNetworking
  {
  //监听网络状态
  AFNetworkReachabilityManager *manager = [AFNetworkReachabilityManager sharedManager];

  //显然是枚举值
  /*
  typedef NS_ENUM(NSInteger, AFNetworkReachabilityStatus) {
  AFNetworkReachabilityStatusUnknown = -1,//未识别的网络
  AFNetworkReachabilityStatusNotReachable = 0,//不可达的网络
  AFNetworkReachabilityStatusReachableViaWWAN = 1,//2G,3G,4G...
  AFNetworkReachabilityStatusReachableViaWiFi = 2,//wifi网络
  */

  [manager ///setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
  switch (status) {
  case AFNetworkReachabilityStatusUnknown:
  NSLog(@"未识别的网络");
  break;

        case AFNetworkReachabilityStatusNotReachable:
            NSLog(@"不可达的网络(未连接)");
            break;
            
        case AFNetworkReachabilityStatusReachableViaWWAN:
            NSLog(@"2G,3G,4G...的网络");
            break;
            
        case AFNetworkReachabilityStatusReachableViaWiFi:
            NSLog(@"wifi的网络");
            break;
        default:
            break;
    }
  

  }];

  //3.开始监听

  [manager startMonitoring];
  }///