Question

我创建了一个带UIButton的自定义单元格作为复选框。按下时，我将按钮图像更改为选中的复选框。如果我在滚动时检查任何复选框，则会检查未检查的其他单元格。我猜我正在使用标记的复选框对单元格进行出列并重新使用它。我无法弄清楚如何正确设置图像。我创建了一个图像数组来保存每个按钮的图像状态，但这不起作用。这是我的代码：

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Celula de Bebidas";

    MeuChurrasTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

    // Configure the cell...

    cell.selectionStyle = UITableViewCellSelectionStyleNone;
    cell.precoTextField.adjustsFontSizeToFitWidth = NO;
    if (indexPath.section == 0) {
        cell.nomeLabel.text = [nomeBebidasAlcoolicas objectAtIndex:indexPath.row]; //nome da bebida
        cell.precoTextField.text = [precoBebidasAlcoolicas objectAtIndex:indexPath.row];
        [cell.checkboxButton setImage:[imagemBebidasAlcoolicasCheckbox objectAtIndex:indexPath.row] forState:UIControlStateNormal];
    } else {
        cell.nomeLabel.text = [nomeBebidasNaoAlcoolicas objectAtIndex:indexPath.row];
        cell.precoTextField.text = [precoBebidasNaoAlcoolicas objectAtIndex:indexPath.row];
        [cell.checkboxButton setImage:[imagemBebidasNaoAlcoolicasCheckbox objectAtIndex:indexPath.row] forState:UIControlStateNormal];
    }
    // identifica cada botao para depois saber qual foi presssionado.
    [cell.checkboxButton setTitle:cell.nomeLabel.text forState:UIControlStateNormal]; 

    return cell;
}

顺便说一下，如果我试试

if (cell == nil)

由于某些原因它永远不会进入if内部，即使第一次调用该表也是如此。

以下是用于设置UIButton图像的代码：

- (void)checkboxPressed:(UIButton *)sender onCell:(MeuChurrasTableViewCell *)cell
{
    NSIndexPath *cellPath = [self.tableView indexPathForCell:cell];
//    NSLog(@"%@ clicked", [nomeBebidasAlcoolicas objectAtIndex:cellPath.row]);
    if ([sender isSelected]) { //Botao nao selecionado
        [sender setImage:unselectedImage forState:UIControlStateNormal];
        [sender setSelected:NO];
        [self.brain.bebidasSelecionadas removeObject:sender.titleLabel.text];
        if (cellPath.section == 0)
            [imagemBebidasAlcoolicasCheckbox insertObject:unselectedImage atIndex:cellPath.row];
        else
            [imagemBebidasNaoAlcoolicasCheckbox insertObject:unselectedImage atIndex:cellPath.row];            
    } else { //Botao selecionado
        [sender setImage:selectedImage forState:UIControlStateSelected];
        [sender setSelected:YES];
        [self.brain.bebidasSelecionadas addObject:sender.titleLabel.text];
        if (cellPath.section == 0)
            [imagemBebidasAlcoolicasCheckbox insertObject:selectedImage atIndex:cellPath.row];
        else
            [imagemBebidasNaoAlcoolicasCheckbox insertObject:selectedImage atIndex:cellPath.row];
    }
}

任何帮助？

UIButton在动态表格中显示错误图像的单元格

0 个答案: