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reloadData - UITableView

2011-09-22 125 views
2

我在显示表格中的数据时遇到问题，在Tebel更新时调用方法[tv reloadData]，但是当我选择一行时，它将显得模糊，就像以前的数据没有被删除一样。我认为问题在于存储由我的SQL查询带来的数据的类，但是我在所有字段中都有一个[发布]，并且不起作用。在那里我存储的查询带来的数据reloadData - UITableView

- (void)readiMAPFromDatabase { 

    // Setup the database object 
    sqlite3 *database; 

    // Init the Array 
    iMAP = [[NSMutableArray alloc] init]; 

    // Open the database from the users filessytem 
    if(sqlite3_open([databasePath UTF8String], &database) == SQLITE_OK) { 

     // Setup the SQL Statement and compile it for faster access 
     sqlite3_stmt *compiledStatement; 
     const char *sqlStatement; 

     if ([sb.text length] == 0) { 

      sqlStatement = "SELECT * FROM APSB1010"; 

     } 
     else { 

      NSString *string1; 

      if ([OpcaoFiltro isEqualToString:@"1"]) { 

       string1 = @"SELECT * FROM APSB1010 WHERE TRIM(COD) LIKE '%"; 
      } 
      else if ([OpcaoFiltro isEqualToString:@"2"]) { 

       string1 = @"SELECT * FROM APSB1010 WHERE TRIM(ARTRF2) LIKE '%"; 
      } 
      else if ([OpcaoFiltro isEqualToString:@"3"]) { 

       string1 = @"SELECT * FROM APSB1010 WHERE TRIM(DESCRI) LIKE '%"; 
      } 
      else if ([OpcaoFiltro isEqualToString:@"4"]) { 

       string1 = @"SELECT * FROM APSB1010 WHERE TRIM(APLICA) LIKE '%"; 
      } 
      else { 

       string1 = @"SELECT * FROM APSB1010 WHERE TRIM(APLICA) LIKE '%"; 
      } 

      NSString *string2 = @"%'"; 
      NSString *result = [[NSString alloc] init]; 

      result = [result stringByAppendingString:string1]; 
      result = [result stringByAppendingString:sb.text]; 
      result = [result stringByAppendingString:string2]; 

      sqlStatement = [result UTF8String]; 
     } 

     if(sqlite3_prepare_v2(database, sqlStatement, -1, &compiledStatement, NULL) == SQLITE_OK) { 

      // Loop through the results and add them to the feeds array 
      while(sqlite3_step(compiledStatement) == SQLITE_ROW) { 

       // Read the data from the result row 
       NSString *ProdCod = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 0)]; 
       NSString *ProdPrv1 = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 1)]; 
       NSString *ProdGrupo = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 2)]; 
       NSString *ProdPicment = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 3)]; 
       NSString *ProdDescri = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 4)]; 
       NSString *ProdArtrf2 = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 5)]; 
       NSString *ProdUm = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 6)]; 
       NSString *ProdEmbap = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 7)]; 
       NSString *ProdDesmax = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 8)]; 
       NSString *ProdImgap = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 9)]; 
       NSString *ProdAplica = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 10)]; 
       NSString *ProdQatu_01 = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 11)]; 
       NSString *ProdQatu_11 = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 12)]; 
       NSString *ProdQatu_12 = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 13)]; 
       NSString *ProdQatu_13 = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 14)]; 
       NSString *ProdQatu_14 = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 15)]; 
       NSString *ProdPrprom = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 16)]; 
       NSString *ProdR_E_C_N_O_ = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 17)]; 

       // Create a new object with the data from the database 
       iMAPArrayProdutos *ArrayProdutos = [[iMAPArrayProdutos alloc] Cod:ProdCod Prv1:ProdPrv1 Grupo:ProdGrupo Picment:ProdPicment Descri:ProdDescri Artrf2:ProdArtrf2 Um:ProdUm Embap:ProdEmbap Desmax:ProdDesmax Imgap:ProdImgap Aplica:ProdAplica Qatu_01:ProdQatu_01 Qatu_11:ProdQatu_11 Qatu_12:ProdQatu_12 Qatu_13:ProdQatu_13 Qatu_14:ProdQatu_14 Prprom:ProdPrprom R_E_C_N_O_:ProdR_E_C_N_O_]; 

       // Add the object to the Array 
       [iMAP addObject: ArrayProdutos]; 

       [ArrayProdutos release]; 
      } 
     } 

     // Release the compiled statement from memory 
     sqlite3_finalize(compiledStatement); 
    } 

    sqlite3_close(database); 

    [tv reloadData]; 
}

类：

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { 

    iMAPArrayProdutos *ArrayProdutos = (iMAPArrayProdutos *)[iMAP objectAtIndex:indexPath.row]; 

    NSString *MyIdentifier = [NSString stringWithFormat:@"MyIdentifier %i", indexPath.row]; 

    iMAPTabela *cell = (iMAPTabela *)[tableView dequeueReusableCellWithIdentifier:MyIdentifier]; 

    tv.autoresizesSubviews = YES; 

    if (cell == nil) { 

     cell = [[[iMAPTabela alloc] initWithFrame:CGRectZero reuseIdentifier:MyIdentifier] autorelease]; 
    } 

    UILabel *label = [[[UILabel alloc] initWithFrame:CGRectMake(0.0, 0, 50.0, tableView.rowHeight)] autorelease]; 

    [cell addColumn:70]; 

    label.tag = TAG_1; 
    label.font = [UIFont systemFontOfSize:12.0]; 
    label.text = ArrayProdutos.Cod; 
    label.textAlignment = UITextAlignmentRight; 
    label.textColor = [UIColor blueColor]; 
    label.autoresizingMask = UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleHeight; 

    [cell.contentView addSubview:label]; 

    label = [[[UILabel alloc] initWithFrame:CGRectMake(80.0, 0, 50.0, tableView.rowHeight)] autorelease]; 

    [cell addColumn:140]; 

    label.tag = TAG_2; 
    label.font = [UIFont systemFontOfSize:12.0]; 
    label.text = ArrayProdutos.Artrf2; 
    label.textAlignment = UITextAlignmentRight; 
    label.textColor = [UIColor blueColor]; 
    label.autoresizingMask = UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleHeight; 

    [cell.contentView addSubview:label]; 

    label = [[[UILabel alloc] initWithFrame:CGRectMake(145.0, 0, 100.0, tableView.rowHeight)] autorelease]; 

    [cell addColumn:260]; 

    label.tag = TAG_3; 
    label.font = [UIFont systemFontOfSize:12.0]; 
    label.text = ArrayProdutos.Descri;  
    label.textAlignment = UITextAlignmentRight; 
    label.textColor = [UIColor blueColor]; 
    label.autoresizingMask = UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleHeight; 

    [cell.contentView addSubview:label]; 

    return cell; 
}

直接从银行进行查询

@implementation iMAPArrayProdutos 

@synthesize Cod; 
@synthesize Prv1; 
@synthesize Grupo; 
@synthesize Picment; 
@synthesize Descri; 
@synthesize Artrf2; 
@synthesize Um; 
@synthesize Embap; 
@synthesize Desmax; 
@synthesize Imgap; 
@synthesize Aplica; 
@synthesize Qatu_01; 
@synthesize Qatu_11; 
@synthesize Qatu_12; 
@synthesize Qatu_13; 
@synthesize Qatu_14; 
@synthesize Prprom; 
@synthesize R_E_C_N_O_; 

-(id)Cod:(NSString *)ProdCod Prv1:(NSString *)ProdPrv1 Grupo:(NSString *)ProdGrupo Picment:(NSString *)ProdPicment Descri:(NSString *)ProdDescri Artrf2:(NSString *)ProdArtrf2 Um:(NSString *)ProdUm Embap: (NSString *)ProdEmbap Desmax:(NSString *)ProdDesmax Imgap:(NSString *)ProdImgap Aplica:(NSString *)ProdAplica Qatu_01:(NSString *)ProdQatu_01 Qatu_11:(NSString *)ProdQatu_11 Qatu_12:(NSString *)ProdQatu_12 Qatu_13:(NSString *)ProdQatu_13 Qatu_14:(NSString *)ProdQatu_14 Prprom:(NSString *)ProdPrprom R_E_C_N_O_:(NSString *)ProdR_E_C_N_O_ { 

    self.Cod = ProdCod; 
    self.Prv1 = ProdPrv1; 
    self.Grupo = ProdGrupo; 
    self.Picment = ProdPicment; 
    self.Descri = ProdDescri; 
    self.Artrf2 = ProdArtrf2; 
    self.Um = ProdUm; 
    self.Embap = ProdEmbap; 
    self.Desmax = ProdDesmax; 
    self.Imgap = ProdImgap; 
    self.Aplica = ProdAplica; 
    self.Qatu_01 = ProdQatu_01; 
    self.Qatu_11 = ProdQatu_11; 
    self.Qatu_12 = ProdQatu_12; 
    self.Qatu_13 = ProdQatu_13; 
    self.Qatu_14 = ProdQatu_14; 
    self.Prprom = ProdPrprom; 
    self.R_E_C_N_O_ = ProdR_E_C_N_O_; 

    return self; 
}

来源

2011-09-22 user941059

回答

5

这个问题可能是在这里：

... 
[cell.contentView addSubview:label]; 
...

你连续添加ne w标签即使重复使用（由dequeueReusableCellWithIdentifier返回）

您应该在创建单元的块中添加标签。之后，如果单元格被重用，只需使用分配的标签从单元格中获取标签，然后根据新数据更改文本。

if (cell == nil) { 
// this is invoked when dequeueReusableCell returns nil - we actually create the label 
    cell = [[[iMAPTabela alloc] initWithFrame:CGRectZero reuseIdentifier:MyIdentifier] autorelease]; 

    UILabel *label = [[[UILabel alloc] initWithFrame:CGRectMake(0.0, 0, 50.0, tableView.rowHeight)] autorelease]; 
    [cell addColumn:70]; 
    label.tag = TAG_1; 
    label.font = [UIFont systemFontOfSize:12.0]; 
    label.text = ArrayProdutos.Cod; 
    label.textAlignment = UITextAlignmentRight; 
    label.textColor = [UIColor blueColor]; 
    label.autoresizingMask = UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleHeight; 
    [cell.contentView addSubview:label]; 
} 

//this is invoked every time UITableView asks for a cell 
UILabel *labelToChange = [cell.contentView viewWithTag:TAG_1]; 
labelToChange.text = text = ArrayProdutos.Cod;

来源

2011-09-22 14:39:33 mja

+0

作品对我来说相当不错 –

0

很久以前我得到同样的问题。这是它的解决方案。 由于新标签在现有标签上重叠，因此您需要在添加新标签之前删除现有标签。

NSArray *subviews = [[NSArray alloc] initWithArray:cell.contentView.subviews]; 
    for (UILabel *subview in subviews) { 
     [subview removeFromSuperview]; 
    } 
    [subviews release];

快乐编码... 求知若饥，虚心若愚。

来源

2011-09-23 04:50:35

+0

好日子Surjit乔希， 谢谢您的合作，这是一件好事，知道我们可以帮助计算。 – user941059

+0

hello user941059 ..你有没有使用上面的代码？ –

+0

我结束了使用代码mja。感谢您的答复。 – user941059

0

我的问题是我在一个视图控制器（tableviews的旋转木马）中有9个tableviews，并且它们都使用了一个单元格标识符。我通过为每个tableview单元分配单独的标识符（在我的例子中为每个tableview指定不同的标识符）来解决这个问题。后

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 
{ 
    static NSString *CellIdentifier = @"ProjectTableviewCell"; 
    TimesheetTableviewCell *cell = [tableView dequeueReusableCellWithIdentifier:[NSString stringWithFormat:@"ProjectTableviewCell %li",tableView.tag]]; 
    if (!cell) { 
     cell = [[TimesheetTableviewCell alloc] initWithReuseIdentifier:CellIdentifier]; 
    } 

    TimesheetWeek *week = [LoginVC getTimesheetWeeks][tableView.tag]; 
    Project *project = week.currentData[indexPath.row]; 
    [cell setCellProject:project]; 

    cell.delegate = self; 

    return cell; 
}

截图之前&： enter image description here enter image description here

来源

2016-05-29 13:54:18 macL0vin

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