iOS 将服务器下载下来的db文件和本地的db文件合并后保存

 /*根据路径创建数据库和表*/

        NSArray *filePath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

        NSString *documentPath = [filePath objectAtIndex:0];

        NSString *dbFilePath = [documentPath stringByAppendingPathComponent:[NSString stringWithFormat:@"IDO_%@.sqlite",user.UserID]];

        

         NSString *newdbFilePath = [documentPath stringByAppendingPathComponent:[NSString stringWithFormat:@"newIDO_%@.sqlite",user.UserID]];

        

/*data 为服务器返回的数据，将它写入本地，然后创建数据库，和本地文件创建的数据库进行对比合并*/

        BOOL B = [data writeToFile:newdbFilePath atomically:YES];

        FMDatabase* database = [ FMDatabase databaseWithPath: dbFilePath];

        FMDatabase* newdatabase = [ FMDatabase databaseWithPath: newdbFilePath];

        if ( ![ database open ] )

        {

            return;

        }

        if ( ![ newdatabase open ] )

        {

            return;

        }

        

        // 查找表 sport_day_data

        FMResultSet* newstepsSet = [newdatabase executeQuery: @"select * from sport_day_data" ];

        

        // 逐行读取数据

        while ([newstepsSet next ] )

        {

            // 对应字段来取数据

            NSString* oldsteps;

            NSString* date = [newstepsSet stringForColumn: @"date" ];

            FMResultSet* oldstepsSets=[database executeQuery:@"select steps from sport_day_data where date=?",date];

            

            

            NSLog(@"historysteps is ---------%@",oldstepsSets);

            while ([oldstepsSets next ] )

            {

                oldsteps = [oldstepsSets stringForColumn: @"steps" ];

                NSLog(@"oldsteps is ---------%@",oldsteps);

            }

            NSString* newsteps = [newstepsSet stringForColumn: @"steps" ];

            if(!oldsteps)

            {

                //今日运动把刷新来的数据重新插入数据库

                VoodaDBModel *parameterModel=[[VoodaDBModel alloc]init];

                parameterModel.date   = date;

                parameterModel.steps   = newsteps;

                parameterModel.total_distance = [newstepsSet stringForColumn: @"total_distance" ];

                parameterModel.total_cal  = [newstepsSet stringForColumn: @"total_cal" ];

                parameterModel.goal_steps = [newstepsSet stringForColumn: @"goal_steps" ];

                parameterModel.times = [newstepsSet stringForColumn: @"times" ];

                parameterModel.hour_steps = [newstepsSet stringForColumn: @"hour_steps" ];

//                VoodaDBOperation * Operation = [[VoodaDBOperation alloc] init];

//               BOOL modelbool=[Operation saveCalculater:parameterModel];

               NSString * proSqlStr = [NSString stringWithFormat:@"INSERT INTO sport_day_data (date,hour_steps,total_cal,steps,total_distance,times,goal_steps) VALUES ('%@','%@','%@','%@','%@','%@','%@')",parameterModel.date,parameterModel.hour_steps,parameterModel.total_cal,parameterModel.steps,parameterModel.total_distance,parameterModel.times,parameterModel.goal_steps];

                bool b = [database executeUpdate:proSqlStr];

            }

            else

            {

                if([oldsteps integerValue]< [newsteps integerValue])

                {

                    //今日运动把刷新来的数据重新插入数据库

                    VoodaDBModel *parameterModel=[[VoodaDBModel alloc]init];

                    parameterModel.date   = date;

                    parameterModel.steps   = newsteps;

                    parameterModel.total_distance = [newstepsSet stringForColumn: @"total_distance" ];

                    parameterModel.total_cal  = [newstepsSet stringForColumn: @"total_cal" ];

                    parameterModel.goal_steps = [newstepsSet stringForColumn: @"goal_steps" ];

                    parameterModel.times = [newstepsSet stringForColumn: @"times" ];

                    parameterModel.hour_steps = [newstepsSet stringForColumn: @"hour_steps" ];

//                    VoodaDBOperation * Operation = [[VoodaDBOperation alloc] init];

//                    BOOL modelbool=[Operation saveCalculater:parameterModel];

                    

                   NSString *proSqlStr = [NSString stringWithFormat:@"UPDATE sport_day_data SET date='%@',hour_steps='%@',total_cal='%@',steps='%@',total_distance='%@',times='%@',goal_steps='%@' where date='%@'",parameterModel.date,parameterModel.hour_steps,parameterModel.total_cal,parameterModel.steps,parameterModel.total_distance,parameterModel.times,parameterModel.goal_steps,parameterModel.date];

                    bool b = [database executeUpdate:proSqlStr];

                }

            }

             NSLog(@"newsteps is ---------%@",newsteps);

        }