(iOS)脱机同步数据库 – 服务器

尝试实现一个应用程序,该应用程序在连接到Internet时将存储在本地数据库中的脱机数据发送到Web服务器我使用下面显示的代码.到目前为止,我测试它工作正常,不确定它将适用于大量的记录.我想知道是否对此代码进行任何调整可能会提高性能???

注意

>我知道这将是用于离线同步目的的最差代码,所以尝试
更好地调整它.
>从应用程序到服务器的单向同步.

-(void)FormatanswersInJSON {

  DMInternetReachability *checkInternet = [[DMInternetReachability alloc] init];
  if ([checkInternet isInternetReachable]) {
     if ([checkInternet isHostReachable:@"www.apple.com"]) {//Change to domain
        responseArray = [[NSMutableArray alloc] init];

        dispatch_async(BACkgroundQueue,^(void) {

            NSArray *auditIDArray = [[NSArray alloc] initWithArray: [self getUnuploadedIDs]];
            for (int temp = 0; temp < [auditIDArray count]; temp ++) {

                // Code to post JSON to server

                NSURLResponse *response;
                NSData *urlData=[NSURLConnection sendSynchronousrequest:request returningResponse:&response error:&error];
                if (!error) {
                    NSString *responsEID = [[NSString alloc]initWithData:urlData encoding:NSUTF8StringEncoding];
                    if ([responsEID isEqualToString:@"ERROR"]) {
                        //Error uploading records
                    } else {
                       [responseArray addObject:responsEID];
                    }
                } else {
                   //Error
                   return;
                }
            }
            dispatch_async( BACkgroundQueue,^{

                /* Based on return code update local DB */
                for (int temp = 0; temp < [responseArray count]; temp ++) {
                   [self updateRecordsForID:[auditIDArray objectATindex:temp] withID:[responseArray objectATindex:temp]];
                }
            });
        });
     }
  }
}

- (void)upload { //Called when internet connection available

    if(BACkgroundQueuE){
        dispatch_suspend(BACkgroundQueuE);
        dispatch_release(BACkgroundQueuE);
        BACkgroundQueue = nil;
    }
    BACkgroundQueue = dispatch_queue_create("com.XXXX.TestApp.bgqueue",null);
    dispatch_async(BACkgroundQueue,^(void) {
        [self FormatanswersInJSON];
    });    
}

for records in groups of X
  collect
  post to server {
    on return:
      gather records that updated successfully
      update locally
  }