为什么 UITableview 数据重叠？

Question

为什么表视图数据重叠？我已附上我的代码。

如果我再次解释我的代码，那么

1. xml 数据位于在表视图中显示的 records 数组中。
2. 第一次当程序执行时，数据位于正确的位置，但是当我开始垂直滚动时，数据开始显示在各个单元格中。假设第一个单元格显示在最后一个单元格中，第二个单元格数据显示在第一个单元格中......依此类推。

注意：对于重叠问题，我还使用了 switch 和 viewwithtag 但现在 tableview 数据仍然开始显示在错误的单元格中> 当我开始在 UITableview 上滚动时。

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

static NSString *CellIdentifier = @"Cell";

UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
   // cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
    cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:CellIdentifier] autorelease];
    cell.textLabel.font = [UIFont fontWithName:@"Helvetica" size:15.0];
    cell.selectionStyle = UITableViewCellSelectionStyleNone;
    NSLog(@"%d",indexPath.section);

    switch (indexPath.section) {
        case 0:
            order_cellView = [[UIView alloc] initWithFrame:CGRectMake(5, 5, cell.frame.size.width,cell.frame.size.height) ];
            order_cellView.backgroundColor = [UIColor redColor];
            order_cellView.tag =1000;

            NSLog(@"index path 0");
            CGRect frame;
            frame.origin.x =0;
            frame.origin.y = 10;
            frame.size.height = 30;
            frame.size.width = 230;

            CGRect valueFrame;
            valueFrame.origin.x =237;
            valueFrame.origin.y = 5;
            valueFrame.size.height = 30;
            valueFrame.size.width = 80;


            for(int m=0;m<numberOfProduct;m++){
                NSLog(@"for loop here");
                productLabel = [[UILabel alloc] initWithFrame:frame];
                productLabel.tag = m;
                productLabel.font = [UIFont fontWithName:@"Arial-BoldMT" size:13];
                productLabel.backgroundColor = [UIColor clearColor];
                productLabel.lineBreakMode = UILineBreakModeCharacterWrap;
                productLabel.numberOfLines = 2;
                productLabel.textAlignment = UITextAlignmentCenter;
                [order_cellView addSubview:productLabel];
                productLabel.text =  [NSString stringWithFormat:@"%@ x %@ x %@",[[products objectAtIndex:m] objectAtIndex:1],[[products objectAtIndex:m] objectAtIndex:2],[[products objectAtIndex:m] objectAtIndex:3]];
                frame.origin.y += 45;

                productValueLabel = [[UILabel alloc] initWithFrame:valueFrame];
                productValueLabel.tag = m+2;
                productValueLabel.font = [UIFont fontWithName:@"Arial-BoldMT" size:13];
                productValueLabel.backgroundColor = [UIColor clearColor];
                productValueLabel.lineBreakMode = UILineBreakModeCharacterWrap;
                productValueLabel.numberOfLines = 2;
                productValueLabel.textAlignment = UITextAlignmentCenter;
                productValueLabel.text = [NSString stringWithFormat:@"%@",[[products objectAtIndex:m] objectAtIndex:5]];
                [order_cellView addSubview:productValueLabel];
                valueFrame.origin.y += 45;
            }
            [cell.contentView addSubview:order_cellView];
            break;
        case 1:
            email_cellView = [[UIView alloc] initWithFrame:CGRectMake(5, 5, cell.frame.size.width,cell.frame.size.height) ];
            email_cellView.backgroundColor = [UIColor clearColor];
            email_cellView.tag =1001;


            emailAdressLabel = [[UILabel alloc] initWithFrame:CGRectMake(2, 0, cell.frame.size.width, cell.frame.size.height)];
            emailAdressLabel.tag = 100;
            emailAdressLabel.font = [UIFont fontWithName:@"Arial-BoldMT" size:13];
            emailAdressLabel.backgroundColor = [UIColor clearColor];
            emailAdressLabel.lineBreakMode = UILineBreakModeCharacterWrap;
            emailAdressLabel.numberOfLines = 2;
            emailAdressLabel.textAlignment = UITextAlignmentLeft;
            emailAdressLabel.text = [NSString stringWithFormat:@"%@",[[records objectAtIndex:0] objectAtIndex:6]];
            [email_cellView addSubview:emailAdressLabel];
            [cell.contentView addSubview:email_cellView];

            break;
        case 2:

            phoneNumberLabel = [[UILabel alloc] initWithFrame:CGRectMake(10, 2, cell.frame.size.width, cell.frame.size.height)];
            phoneNumberLabel.tag = 101;
            phoneNumberLabel.font = [UIFont fontWithName:@"Arial-BoldMT" size:13];
            phoneNumberLabel.backgroundColor = [UIColor clearColor];
            phoneNumberLabel.lineBreakMode = UILineBreakModeCharacterWrap;
            phoneNumberLabel.numberOfLines = 1;
            phoneNumberLabel.textAlignment = UITextAlignmentLeft;
            phoneNumberLabel.text = [NSString stringWithFormat:@"%@",[[records objectAtIndex:0] objectAtIndex:7]];
            [cell.contentView addSubview:phoneNumberLabel];

            break;
        case 3:
            billingDetails = [[UILabel alloc] initWithFrame:CGRectMake(10, 10, 160, cell.frame.size.height)];
            billingDetails.tag = 102;
            billingDetails.font = [UIFont fontWithName:@"Arial-BoldMT" size:13];
            billingDetails.backgroundColor = [UIColor clearColor];
            billingDetails.lineBreakMode = UILineBreakModeCharacterWrap;
            billingDetails.numberOfLines = 4;
            billingDetails.textAlignment = UITextAlignmentLeft;
            billingDetails.text = [NSString stringWithFormat:@"%@",[[records objectAtIndex:0] objectAtIndex:4]];
            [cell.contentView addSubview:billingDetails];
            break;
        case 4:
            shippingDetails = [[UILabel alloc] initWithFrame:CGRectMake(10, 10, 160, cell.frame.size.height)];
            shippingDetails.tag = 103;
            shippingDetails.font = [UIFont fontWithName:@"Arial-BoldMT" size:13];
            shippingDetails.backgroundColor = [UIColor clearColor];
            shippingDetails.lineBreakMode = UILineBreakModeCharacterWrap;
            shippingDetails.numberOfLines = 4;
            shippingDetails.textAlignment = UITextAlignmentLeft;
            shippingDetails.text = [NSString stringWithFormat:@"%@",[[records objectAtIndex:0] objectAtIndex:5]];
            [cell.contentView addSubview:shippingDetails];

            break;
        case 5:
            orderStatus = [[UILabel alloc] initWithFrame:CGRectMake(10, 0, cell.frame.size.width, cell.frame.size.height)];
            orderStatus.tag = 104;
            orderStatus.font = [UIFont fontWithName:@"Arial-BoldMT" size:13];
            orderStatus.backgroundColor = [UIColor clearColor];
            orderStatus.lineBreakMode = UILineBreakModeCharacterWrap;
            orderStatus.numberOfLines = 1;
            orderStatus.textAlignment = UITextAlignmentLeft;
            orderStatus.text = [NSString stringWithFormat:@"%@",[[records objectAtIndex:0] objectAtIndex:19]];
            [cell.contentView addSubview:orderStatus];

            break;
        case 6:
            deleteOrder = [[UILabel alloc] initWithFrame:CGRectMake(10, 0, cell.frame.size.width, cell.frame.size.height)];
            deleteOrder.tag = 110;
            deleteOrder.font = [UIFont fontWithName:@"Arial-BoldMT" size:13];
            deleteOrder.backgroundColor = [UIColor clearColor];
            deleteOrder.lineBreakMode = UILineBreakModeCharacterWrap;
            deleteOrder.numberOfLines = 1;
            deleteOrder.textAlignment = UITextAlignmentLeft;
            deleteOrder.text = [NSString stringWithFormat:@"%@",[[records objectAtIndex:0] objectAtIndex:19]];
            [cell.contentView addSubview:deleteOrder];

            break;

        default:
            break;
    }       
}

switch (indexPath.section) {
    case 0:
        order_cellView = (UIView *)[cell.contentView viewWithTag:1000];
        for(int m=0;m<numberOfProduct;m++){
            productLabel = (UILabel *)[order_cellView viewWithTag:m];
            productValueLabel = (UILabel *)[order_cellView viewWithTag:m+2];
        }
        if(indexPath.section == 0){
            for(int m=0;m<numberOfProduct;m++){
                productLabel.text =  [NSString stringWithFormat:@"%@ x %@ x %@",[[products objectAtIndex:m] objectAtIndex:1],[[products objectAtIndex:m] objectAtIndex:2],[[products objectAtIndex:m] objectAtIndex:3]];
                productValueLabel.text = [NSString stringWithFormat:@"%@",[[products objectAtIndex:m] objectAtIndex:5]];
            }
        }
        break;
    case 1:
        email_cellView = (UIView *)[cell.contentView viewWithTag:1001];
        emailAdressLabel = (UILabel *)[email_cellView viewWithTag:100];
        emailAdressLabel.text = [NSString stringWithFormat:@"%@",[[records objectAtIndex:0] objectAtIndex:6]];      
        break;
    case 2:
        phoneNumberLabel = (UILabel *)[cell.contentView viewWithTag:101];
        phoneNumberLabel.text = [NSString stringWithFormat:@"%@",[[records objectAtIndex:0] objectAtIndex:7]];
        break;
    case 3:
        billingDetails = (UILabel *)[cell.contentView viewWithTag:102];
        billingDetails.text = [NSString stringWithFormat:@"%@",[[records objectAtIndex:0] objectAtIndex:4]];
        break;
    case 4:
        shippingDetails = (UILabel *)[cell.contentView viewWithTag:103];
        shippingDetails.text = [NSString stringWithFormat:@"%@",[[records objectAtIndex:0] objectAtIndex:5]];
        break;
    case 5:
        orderStatus = (UILabel *)[cell.contentView viewWithTag:104];
        orderStatus.text = [NSString stringWithFormat:@"%@",[[records objectAtIndex:0] objectAtIndex:19]];
        break;
    case 6:
        deleteOrder = (UILabel *)[cell.contentView viewWithTag:110];
        deleteOrder.text = [NSString stringWithFormat:@"%@",[[records objectAtIndex:0] objectAtIndex:19]];
        break;
    default:
        break;
}

return cell;

}

Answer 1

我认为你的主要问题是你有七种不同“类型”的单元格，但只有一种“重用标识符”。这意味着订单单元格稍后可以重新用作删除订单单元格。但是，当重复使用时，单元格不一定具有完全显示所需的所有元素。

例如，电子邮件单元格的标签为 1001，删除单元格的标签为 110，但反之则不然。

Answer 2

只需要为您声明的每个单元格提供不同的标识符，因此如果您这样做，它们将识别该单元格，并且数据不会相互合并

，还有一个解决方案是为每个单元格子视图标记提供并使用子视图标记查看单元格。 。

Answer 3

将 CellIdentifier 替换为 nil-

[tableView dequeueReusableCellWithIdentifier:CellIdentifier];

这是因为您正在重复使用单元格标识符，因此数据重叠