网络状态

-(void)checkNetworkState
{
    Reachability *wifi = [Reachability reachabilityForLocalWiFi];
    Reachability *conn = [Reachability reachabilityForInternetConnection];
    if ([wifi currentReachabilityStatus] == NotReachable&&[conn currentReachabilityStatus] == NotReachable) {
        _dataArray =  [NSMutableArray arrayWithArray: [database recordWithRecordType:RecordTypeFavirote]];
        [_collectionTableView reloadData];
    }
    else{
        [self requestData];
    }
}