Question

我想知道是否可以根据行索引将单元格内容添加到uitableview中？

例如，如果它是第一个单元格（第0行），我想添加图像和文本。如果是第二行我想添加一个按钮。对于所有其他行，我只想添加一行文字。

我尝试使用indexPath.row。它第一次工作，但当我滚动屏幕然后备份我的第一个图像消失时。

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

    PromoListItem *promo = [promoList objectAtIndex:indexPath.row];

    static NSString *CellIdentifier = @"Cell";

    AsyncImageView *asyncImageView = nil;
    UILabel *label = nil;
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

    if(indexPath.row==0)
    {
    if (cell == nil) {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
        CGRect frame;
        frame.origin.x = 0;
        frame.origin.y = 0;
        frame.size.width = 100;
        frame.size.height = 100;

        asyncImageView = [[[AsyncImageView alloc] initWithFrame:frame] autorelease];
        asyncImageView.tag = ASYNC_IMAGE_TAG;
        [cell.contentView addSubview:asyncImageView];


        frame.origin.x = 110;
        frame.size.width =100;
        label = [[[UILabel alloc] initWithFrame:frame] autorelease];
        label.tag = LABEL_TAG;
        [cell.contentView addSubview:label];
        cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
    } else {
        asyncImageView = (AsyncImageView *) [cell.contentView viewWithTag:ASYNC_IMAGE_TAG];
        label = (UILabel *) [cell.contentView viewWithTag:LABEL_TAG];
    }

    NSURL *url = [NSURL URLWithString:promo.imgurl];

    [asyncImageView loadImageFromURL:url];

    label.text = promo.artistname;
    }else

    {

        if (cell == nil) {
            cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
            CGRect frame;
            frame.origin.x = 0;
            frame.origin.y = 0;
            frame.size.width = 100;
            frame.size.height = 100;

            //asyncImageView = [[[AsyncImageView alloc] initWithFrame:frame] autorelease];
        //  asyncImageView.tag = ASYNC_IMAGE_TAG;
        //  [cell.contentView addSubview:asyncImageView];


            frame.origin.x = 110;
            frame.size.width =100;
            label = [[[UILabel alloc] initWithFrame:frame] autorelease];
            label.tag = LABEL_TAG;
            [cell.contentView addSubview:label];
            cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
        } else {
        //  asyncImageView = (AsyncImageView *) [cell.contentView viewWithTag:ASYNC_IMAGE_TAG];
            label = (UILabel *) [cell.contentView viewWithTag:LABEL_TAG];
        }

        //NSURL *url = [NSURL URLWithString:promo.imgurl];

        //[asyncImageView loadImageFromURL:url];

        label.text = promo.artistname;



    }

    return cell;
}

Answer 1

您希望这些细胞如何定制？如果您只是添加文本，图像和附件按钮，则可以在行检查之外创建单元格，然后在if语句中添加所需的项目。

 cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
    NSUInteger row = [indexPath row];
    switch(row) {
        case 0:
            cell.textLabel.text = @"row 0";
            cell.image
            break;
        case 1:
            cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
            break;
        default:
            cell.textLabel.text = [NSString stringWithFormat:@"row %d",row];
            break;      
    }

    return cell;

但是，当您开始回收单元格时，行会发生变化，您可能希望在实际数据中包含指示单元格行为方式的内容。

基于行索引iphone的自定义单元格

1 个答案: