UITableView另一个单元格图像也会在选中时更改

Question

我有一个UITableView，其中有七个部分，其中一些部分中有可扩展的行。当单击可扩展部分时，它的第0行应该更改图像并且它正在执行但是最后一部分不可扩展它的行也会更改图像但是当我随机播放表视图时一切都会正常。发布下面的图片以明确发生的事情。

发布我的代码

-(UITableViewCell *) tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell;

if(tableView == self.mWeekTable)
{
    cell = [self.mWeekTable dequeueReusableCellWithIdentifier:CellIdentifier];

    if (cell == nil)
    {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];
    }
    else
    {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];
    }

    cell.selectionStyle = UITableViewCellSelectionStyleNone;

    //cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;

    myBackgroundView = [[UIView alloc] initWithFrame:CGRectZero];
    myBackgroundView.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"sub_cell.png"]];
    //myBackgroundView.backgroundColor = [UIColor colorWithRed:219.0/255.0 green:218.0/255.0 blue:224.0/255.0 alpha:1.0];
    cell.backgroundView = myBackgroundView;
    [cell addSubview:myBackgroundView];

    UILabel *lblDateTitle = [[UILabel alloc]initWithFrame:CGRectMake(10, 10, 150, 30)];
    lblDateTitle.font = [UIFont fontWithName:@"Helvetica" size:22];
    lblDateTitle.textColor = [UIColor colorWithRed:169.0/255.0 green:168.0/255.0 blue:176.0/255.0 alpha:1.0];
    lblDateTitle.backgroundColor = [UIColor clearColor];

    UILabel *lblEName = [[UILabel alloc]initWithFrame:CGRectMake(10, 0, 170, 25)];
    lblEName.font = [UIFont fontWithName:@"Helvetica" size:15];
    lblEName.textColor = [UIColor colorWithRed:47.0/255.0 green:200.0/255.0 blue:247.0/255.0 alpha:1.0];
    lblEName.backgroundColor = [UIColor clearColor];

    UIImageView *imgTimer = [[UIImageView alloc]initWithFrame:CGRectMake(10, 26, 20, 22)];

    UILabel *lblTime = [[UILabel alloc]initWithFrame:CGRectMake(40, 25, 150, 25)];
    lblTime.font = [UIFont fontWithName:@"Helvetica" size:15];
    lblTime.textColor = [UIColor blackColor];
    lblTime.backgroundColor = [UIColor clearColor];

    UIImageView *imgCateg = [[UIImageView alloc]initWithFrame:CGRectMake(175, 26, 20, 22)];

    UILabel *lblCateg = [[UILabel alloc]initWithFrame:CGRectMake(200, 28, 90, 20)];
    //self.lblCateg.text = @"Category";
    lblCateg.font = [UIFont fontWithName:@"Helvetica" size:15];
    lblCateg.textColor = [UIColor blackColor];
    lblCateg.backgroundColor = [UIColor clearColor];



    NSString *weekDate = [[NSString alloc]init];

    UILabel *lblEventsCount = [[UILabel alloc]initWithFrame:CGRectMake(110, 16, 100, 20)];
    lblEventsCount.backgroundColor = [UIColor clearColor];
    lblEventsCount.textColor = [UIColor colorWithRed:47.0/255.0 green:200.0/255.0 blue:247.0/255.0 alpha:1.0];
    lblEventsCount.font = [UIFont fontWithName:@"Helvetica" size:18];

    int evntCnt;

    if(indexPath.section == 0)
    {
         evntCnt = [self.mArrDayOneEvents count];
        if(!isWeekListOne)
        {

            NSDateFormatter* df = [[NSDateFormatter alloc]init];
            [df setDateFormat:@"EEE, dd"];
            weekDate = [df stringFromDate:[self.mArrDates objectAtIndex:indexPath.section]];
            lblDateTitle.text = weekDate;

            if(evntCnt == 0)
            {
                myBackgroundView.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"cell_blank.png"]];
            }
            else{
                myBackgroundView.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"cell_bg+.png"]];
                lblEventsCount.text = [NSString stringWithFormat:@"%d Events", evntCnt];
            }
        }
        else
        {
            if(indexPath.row == 0)
            {
               [cell addSubview:lblEventsCount];
                NSDateFormatter* df = [[NSDateFormatter alloc]init];
                [df setDateFormat:@"EEE, dd"];
                weekDate = [df stringFromDate:[self.mArrDates objectAtIndex:indexPath.section]];
                lblDateTitle.text = weekDate;

                if(evntCnt == 0)
                {
                    myBackgroundView.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"cell_blank.png"]];
                }
                else{
                    myBackgroundView.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"cell_bg-.png"]];
                    lblEventsCount.text = [NSString stringWithFormat:@"%d Events", evntCnt];
                }
            }
            else{
                int ind = indexPath.row;
                ind--;
               // cell.textLabel.text = [self.mArrDayOneEvents objectAtIndex:ind];
                lblEName.text = [self.mArrDayOneEvents objectAtIndex:ind];
                imgTimer.image = [UIImage imageNamed:@"timer1.png"];
            }
        }
        }
    [cell addSubview:lblDateTitle];
    [cell addSubview:lblEName];
    [cell addSubview:lblCateg];
    [cell addSubview:lblTime];
    [cell addSubview:imgCateg];
    [cell addSubview:imgTimer];
    [cell addSubview:lblEventsCount];

}

不发布完整代码，因为其他部分也有与上面和下面相同的代码。

    -(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
    {
         if(tableView == self.mWeekTable)
  {
      int evntCnt;
      if(indexPath.section == 0)
      {
           evntCnt = [self.mArrDayOneEvents count];
          if(indexPath.row == 0)
          {
              isWeekListOne  = !isWeekListOne;

              if(isWeekListOne)
              {
                  if(evntCnt == 0)
                  {
                      myBackgroundView.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"cell_blank.png"]];
                  }
                  else{
                      myBackgroundView.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"cell_bg-.png"]];
                  }

              }
              else{
                  if(evntCnt == 0)
                  {
                      myBackgroundView.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"cell_blank.png"]];
                  }
                  else{
                      myBackgroundView.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"cell_bg+.png"]];
                  }
              }
              selectedCellIndexPath = indexPath.row;
              [self.mWeekTable reloadSections:[NSIndexSet indexSetWithIndex:indexPath.section] withRowAnimation:UITableViewRowAnimationFade];
          }
      }
}

int evntCnt用于检查那些有事件的部分。如果有什么不清楚请问。在上面寻求帮助。提前谢谢。

Answer 1

看起来您的问题与细胞重用有关。一般来说，有两件事要看：

1. 确保每个不同的配置使用不同的单元标识符（具有不同的值）
2. 重复使用单元格时，重置所有内容

目前，您正在为细胞添加大量子视图。重新使用单元格时不会删除它们。因此，图像会留在那里并显示在不应该存在的行上。您最好的选择是使用自定义单元格子类，这样您的代码就不会创建所有子视图，并添加一种简单的方法来设置显示和隐藏相应子视图的单元格模式。然后始终在创建/重用单元格时设置模式。