如何在我的sqlite數據庫中一次插入多行sqlite中的iPhone

Question

只有一行效果但我希望效果4row一次我的代碼正在爲一行而不是其他值保存如何編寫代碼以保存在sqlite的多重值4row

我嘗試了很多，但我不知道如何插入不同的值在sqlite數據庫中的不同行。

我對天氣創建應用程序我得到的XML解析所有天氣狀況信息我解析表視圖中的所有值我看到所有value.here在XML文件中的所有適當

我得到目前的狀況元素和三個預測條件是表示今天顯示的天氣狀況.and forecastcondition顯示下一個3day天氣狀況.i爲這個數據創建這個數據.3class與名稱currentcondition和forecastcondition在forecastecondition元素中我有相同的名字next 3day元素名稱意味着元素名稱相同forecastcondition我存儲所有在下一個3day值中逐個取值的數組中的預測條件值顯示它在表格單元格中正確工作，我看到1cell上的當前條件值以及接下來的所有下一個3預測條件3cell我的代碼是適當的工作，但現在我想存儲第一個單元格值和下一個3day值單元格在SQLite數據庫表中一次，但我怎麼必須存儲

但我保存當前條件在sqlite因爲我creatcon對象currentcondition類然後我將值傳遞給sqlite，所以如何解析另一個單元格的值，但我的表是一個，我給所有的顏色名稱在附加文件中，我想在此表中插入值coloum只有

我寫這個代碼存儲sqlite請檢查代碼，這是我的控制器類，我在這裏顯示單元格的值，我只寫了代碼爲sqlite保存數據，請幫助我的朋友

// 
    // TWeatherController.m 
    // Journey 
    // 
    // Created by pradeep.yadav on 5/3/11. 
    // Copyright 2011 __MyCompanyName__. All rights reserved. 
    // 

    #import "TWeatherController.h" 
    #import "TWeatherCell.h" 
    #import "ForecastInfoParser.h" 
    #import "global.h" 
    #define DATABASE_NAME @"test.sqlite" 
    #define DATABASE_TITLE @"test" 
    #import <sqlite3.h> 



    @implementation TWeatherController 
    @synthesize MyTableView; 
    @synthesize forecastcond; 

    #pragma mark - 
    #pragma mark View lifecycle 







    - (NSString *) getWritableDBPath { 

     NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory , NSUserDomainMask, YES); 
     NSString *documentsDir = [paths objectAtIndex:0]; 
     return [documentsDir stringByAppendingPathComponent:DATABASE_NAME]; 
    } 

    -(void)createEditableCopyOfDatabaseIfNeeded 
    { 
     // Testing for existence 
     BOOL success; 
     NSFileManager *fileManager = [NSFileManager defaultManager]; 
     NSError *error; 
     NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, 
                  NSUserDomainMask, YES); 
     NSString *documentsDirectory = [paths objectAtIndex:0]; 
     NSString *writableDBPath = [documentsDirectory stringByAppendingPathComponent:DATABASE_NAME]; 
     NSLog(@"%@",writableDBPath); 

     success = [fileManager fileExistsAtPath:writableDBPath]; 
     if (success) 
      return; 

     // The writable database does not exist, so copy the default to 
     // the appropriate location. 
     NSString *defaultDBPath = [[[NSBundle mainBundle] resourcePath] 
            stringByAppendingPathComponent:DATABASE_NAME]; 
     success = [fileManager copyItemAtPath:defaultDBPath 
             toPath:writableDBPath 
             error:&error]; 
     if(!success) 
     { 
      NSAssert1(0,@"Failed to create writable database file with Message : '%@'.", 
         [error localizedDescription]); 
     } 
    } 


    -(BOOL) insertData 

    { 
    [self createEditableCopyOfDatabaseIfNeeded]; 
    //NSString *filePath = [self getWritableDBPath]; 
     BOOL value = NO; 

     @try { 

      sqlite3 *database; 
      if (sqlite3_open([[self getWritableDBPath] UTF8String], &database) != SQLITE_OK) 
      { 
       sqlite3_close(database); 
      } 
      else { 
       NSString *nsQuery = [[NSString alloc] initWithFormat:@"INSERT INTO weather (ReportDate,conditionname,humidity,maxtemp,mintemp,wind) VALUES('%@','%@','%@','%@','%@','%@')" ,_forecastInfo.CurrentDateTime,currentcond.Condition,currentcond.Tempf,currentcond.Tempf,currentcond.WindCondition,currentcond.Humidity]; 
       const char *query = [nsQuery UTF8String]; 
       [nsQuery release]; 

       sqlite3_stmt *statement; 
       int errorCode = sqlite3_prepare_v2(database, query, -1, &statement, NULL); 
       if(errorCode == SQLITE_OK) { 
        int result = sqlite3_step(statement); 
        if(result == SQLITE_DONE) { 
         value = YES; 
         sqlite3_finalize(statement); 
        } 
       } 
       sqlite3_close(database); 
      } 
     } 
     @catch (NSException *exception) { 
      NSLog(@"Error encountered while reading facts: %@", [exception reason]); 
     } 
     return value; 
    } 

    - (void)viewDidLoad { 
     [super viewDidLoad]; 
     _forecastInfo=nil; 
     currentcond=nil; 
     forecastcond=nil; 
     NSString *URL=@"http://www.google.com/ig/api?weather=,,,50500000,30500000"; 
     NSURLRequest *theRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:URL]]; 
     NSURLResponse *resp = nil; 
     NSError *err = nil; 
     NSData *response = [NSURLConnection sendSynchronousRequest: theRequest returningResponse: &resp error: &err]; 
     NSString * theString = [[NSString alloc] initWithData:response encoding:NSUTF8StringEncoding]; 
     //[resp release]; 
     [err release]; 
     NSLog(@"response: %@", theString);  
     ForecastInfoParser *parser=[[ForecastInfoParser alloc]init]; 
     parser.delegate=self; 
     [parser parseData:response]; 


     //[self selected]; 
     [self insertData]; 


    } 


    -(void)forecastInfoParser:(ForecastInfoParser*)parser parsed:(ForecastInformation*)forecastInfo 
    { 
     _forecastInfo=[forecastInfo retain]; 
     [MyTableView reloadData]; 
    } 

    -(void)forecastInfo:(ForecastInfoParser*)parser parsed:(CurrentCondition*)currentcondition 
    { 
     currentcond=[currentcondition retain]; 
     [MyTableView reloadData]; 
    } 

    -(void)forecastInfoCondition:(ForecastInfoParser*)parser parsed:(NSMutableArray *)forecastcondition 
    { 
     forecastcond=[forecastcondition retain]; 
     [MyTableView reloadData]; 
    } 

    #pragma mark - 
    #pragma mark Table view data source 

    - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { 
     // Return the number of sections. 
     return 1; 
    } 


    - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { 
     if(_forecastInfo&&currentcond&&forecastcond) 
      return 4; 
     return 0; 

    } 


    // Customize the appearance of table view cells. 
    - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { 

     TWeatherCell *cell =(TWeatherCell *) [MyTableView dequeueReusableCellWithIdentifier:[NSString stringWithFormat:@"cell_%d", indexPath.row]]; 
     if (cell == nil) { 
      //cell = [[[TWeatherCell alloc] initWithStyle:UITableViewStyleGrouped reuseIdentifier:CellIdentifier] autorelease]; 
      cell = [[[TWeatherCell alloc] initWithFrame:CGRectZero reuseIdentifier:[NSString stringWithFormat:@"cell_%d", indexPath.row]] autorelease]; 
     } 
     //ForecastCondition *cond=[forecastcond objectAtIndex:0]; 
     cond1=[forecastcond objectAtIndex:1]; 
     cond2=[forecastcond objectAtIndex:2]; 
     cond3=[forecastcond objectAtIndex:3]; 
     if ([currentcond.Icon isEqualToString:@"http://\n"]) 
     { 
      cell.weatherimage.image = [UIImage imageNamed:@"listIcon-H.png"]; 
     } 
     else { 
      NSData *imageData = [[NSData alloc]initWithContentsOfURL:[NSURL URLWithString:currentcond.Icon]];  
      NSLog(@"this is image from server:%@",imageData); 
      cell.weatherimage.image = [UIImage imageWithData:imageData]; 
      [imageData release]; 
     } 
     NSDate *today = [NSDate date]; 
     NSDateFormatter *date_formatter=[[NSDateFormatter alloc]init]; 
     NSString *str=NSLocalizedString(@"date",nil); 
     [date_formatter setDateFormat:str]; 
     NSTimeInterval secondsPerDay = 24 * 60 * 60; 
     //NSDate *today = [NSDate date]; 
     NSDate *thursday = [NSDate dateWithTimeInterval:secondsPerDay sinceDate:today]; 
     NSDate *friday = [NSDate dateWithTimeInterval:2*secondsPerDay sinceDate:today]; 
     NSDate *sunday = [NSDate dateWithTimeInterval:3*secondsPerDay sinceDate:today]; 
     //tomorrow = [today addTimeInterval:secondsPerDay]; 
     switch (indexPath.row) { 
      case 0: 
       NSLog(@"%d",indexPath.row); 
       NSData *imageData = [[NSData alloc]initWithContentsOfURL:[NSURL URLWithString:currentcond.Icon]]; 
       NSLog(@"this is image from server:%@",imageData); 
       cell.weatherimage.image = [UIImage imageNamed:photo]; 
       [imageData release]; 
      file://localhost/Users/pradeepyadav/Desktop/JourneyMapper/Journey/Classes/TJourneyTabBar.hcell.weatherimage.image = [UIImage imageNamed:photo];  
       cell.reportdate.text = _forecastInfo.CurrentDateTime; 
       //cell.conditionname.text = currentcond.Condition; 
       [cell setConditionName:currentcond.Condition];  
       //[cell setConditionName:cond1.Condition]; 
       cell.twotemp.text = [NSString stringWithFormat:@"Temp:%@/%@",currentcond.Tempf,currentcond.Tempc]; 
       cell.twodirection.text = currentcond.WindCondition; 
       cell.humidity.text = currentcond.Humidity; 

       break; 
      case 1: 
       NSLog(@"%d",indexPath.row); 
       cell.weatherimage.image = [UIImage imageNamed:photo]; 
       cell.reportdate.text =[NSString stringWithFormat:@"%@",thursday]; 
       //cell.conditionname.text = cond1.Condition; 
       [cell setConditionName:cond1.Condition]; 
       cell.twotemp.text = [NSString stringWithFormat:@"Temp:%@/%@",cond1.Low,cond1.High]; 
       break; 
      case 2: 
       NSLog(@"%d",indexPath.row); 
       cell.weatherimage.image = [UIImage imageNamed:photo]; 
       cell.reportdate.text = [NSString stringWithFormat:@"%@",friday]; 
       //cell.conditionname.text = cond2.Condition; 
       [cell setConditionName:cond2.Condition]; 
       cell.twotemp.text = [NSString stringWithFormat:@"Temp:%@/%@",cond2.Low,cond2.High]; 
       break; 
      case 3: 
       NSLog(@"%d",indexPath.row); 
       cell.weatherimage.image = [UIImage imageNamed:photo]; 
       cell.reportdate.text = [NSString stringWithFormat:@"%@",sunday]; 
       //cell.conditionname.text = cond3.Condition; 
       [cell setConditionName:cond3.Condition]; 
       cell.twotemp.text = [NSString stringWithFormat:@"Temp:%@/%@",cond3.Low,cond3.High]; 
       break; 
      default: 
       NSLog(@"Out of Range ",indexPath.row); 
       break; 
     } 
     return cell; 
    } 






    #pragma mark - 
    #pragma mark Table view delegate 

    - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { 
     [tableView deselectRowAtIndexPath:indexPath animated:YES]; 
     // Navigation logic may go here. Create and push another view controller. 
     /* 
     <#DetailViewController#> *detailViewController = [[<#DetailViewController#> alloc] initWithNibName:@"<#Nib name#>" bundle:nil]; 
     // ... 
     // Pass the selected object to the new view controller. 
     [self.navigationController pushViewController:detailViewController animated:YES]; 
     [detailViewController release]; 
     */ 
    } 



    -(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *) indexPath 
    { 
     return 100.0; 
    } 


    #pragma mark - 
    #pragma mark Memory management 

    - (void)didReceiveMemoryWarning { 
     // Releases the view if it doesn't have a superview. 
     [super didReceiveMemoryWarning]; 

     // Relinquish ownership any cached data, images, etc. that aren't in use. 
    } 

    - (void)viewDidUnload { 
     // Relinquish ownership of anything that can be recreated in viewDidLoad or on demand. 
     // For example: self.myOutlet = nil; 
    } 


    - (void)dealloc { 
     [super dealloc]; 
     [_forecastInfo release]; 
     [currentcond release]; 
     [forecastConditions release]; 
    } 

    @end 

Answer 1

我相信你問的是「如何在一個SQL命令中更新4行？」

最簡單的方法是使用「;」分手的sql語句，形成一個字符串

你的主要SQL字符串似乎是NSString的nsQuery執行4次不同的查詢，這裏你可以設置它，雖然它有點乏味

NSString *qry1 = [NSString stringWithFormat:@"INSERT INTO weather (ReportDate,conditionname,humidity,maxtemp,mintemp,wind) VALUES('%@','%@','%@','%@','%@','%@')" ,_forecastInfo.CurrentDateTime,currentcond.Condition,currentcond.Tempf,currentcond.Tempf,currentcond.Wind2ondition,currentcond.Humidity]; 
NSString *qry2 = [NSString stringWithFormat:@"INSERT INTO newtable(DifferentColumn) VALUES('Dummy Data')"]; 
NSString *qry3 = [NSString stringWithFormat:@"INSERT INTO thirdtable(Temp) VALUES(3)"]; 
NSString *qry4 = [NSString stringWithFormat:@"INSERT INTO forthtable(Other) VALUES('indigo')"]; 

NSString *nsQuery = [[NSString alloc] initWithFormat:@"%@;%@;%@;%@",qry1,qry2,qry3,qry4];