当我在 UItableview 中滚动时，数据重叠...为什么？

Question

我有 UItableview，其中每个单元格包含 5 个单元格，这些单元格代表一些已解析的 xml 数据。当 UITableview 在视图控制器的开头执行时，它会显示正确的数据NSMutableArray 中的正确单元格，但现在我的问题是，当滚动到新鲜数据以从 xml 文件更新数据时，数据会分散到代表不同数据的不同单元格中。如果我解释一下……

第一个单元格是索引号1 但刷新表格单元格 1 后显示数据单元格 5 或任何其他单元格，这意味着单元格实际上并不重叠，但其数据以错误的方式表示。我没有找到解决方案，请任何人帮助我......

这是我的表格视图单元格代码

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


static NSString *MyIdentifier = @"MyIdentifier";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:MyIdentifier];
if (cell == nil) {
    cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:MyIdentifier] autorelease];
    cell.textLabel.font = [UIFont fontWithName:@"Helvetica" size:15.0];
    cell.selectionStyle = UITableViewCellSelectionStyleNone;

    UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"arrow.png"]];
    cell.accessoryView = imageView;
    cell.accessoryType = UITableViewCellSelectionStyleNone;
    tableView.separatorColor = [UIColor clearColor];
    tableView.separatorStyle = UITableViewCellSeparatorStyleSingleLine;


    cellView = [[[UIView alloc] initWithFrame:CGRectMake(5,8,290, 120)] autorelease];
    cellView.backgroundColor = [UIColor clearColor];
    cellView.tag =10;
    [cell.contentView addSubview:cellView];

    imgView = [[UIImageView alloc] initWithFrame:CGRectMake(2, 40, 48, 48)];
    imgView.image = [UIImage imageNamed:@"productbox.png"];
    imgView.layer.borderColor = [UIColor blackColor].CGColor;
    imgView.layer.borderWidth = 2.0;
    imgView.tag = 5;
    [cellView addSubview:imgView];


    CGRect idLabelRect = CGRectMake(65, 0, 190, 18);
    idLabel = [[[UILabel alloc] initWithFrame:idLabelRect] autorelease];
    idLabel.textAlignment = UITextAlignmentLeft;
    idLabel.textColor = [UIColor blackColor];
    idLabel.font = [UIFont systemFontOfSize:12];
    idLabel.backgroundColor = [UIColor clearColor];
    idLabel.layer.borderColor = [UIColor grayColor].CGColor;
    idLabel.tag = 0;

    CGRect statusRect = CGRectMake(65, 22, 190, 22);
    statusLabel = [[[UILabel alloc] initWithFrame:statusRect] autorelease];
    statusLabel.textAlignment = UITextAlignmentLeft;
    statusLabel.textColor = [UIColor blackColor];
    statusLabel.font = [UIFont systemFontOfSize:12];
    statusLabel.backgroundColor = [UIColor clearColor];
    statusLabel.layer.borderColor = [UIColor grayColor].CGColor;
    statusLabel.tag = 1;

    CGRect orderDateRect = CGRectMake(65, 48, 190, 22);
    orderDate = [[[UILabel alloc] initWithFrame:orderDateRect] autorelease];
    orderDate.textAlignment = UITextAlignmentLeft;
    orderDate.textColor = [UIColor blackColor];
    orderDate.font = [UIFont systemFontOfSize:12];
    orderDate.backgroundColor = [UIColor clearColor];
    orderDate.layer.borderColor = [UIColor grayColor].CGColor;
    orderDate.tag = 2;

    CGRect byRect = CGRectMake(65, 75, 190, 22);
    byLabel = [[[UILabel alloc] initWithFrame:byRect] autorelease];
    byLabel.textAlignment = UITextAlignmentLeft;
    byLabel.textColor = [UIColor blackColor];
    byLabel.font = [UIFont systemFontOfSize:12];
    byLabel.backgroundColor = [UIColor clearColor];
    byLabel.layer.borderColor = [UIColor grayColor].CGColor;
    byLabel.tag = 3;

    CGRect totalRect = CGRectMake(65, 98, 190, 22);
    totalLabel = [[[UILabel alloc] initWithFrame:totalRect] autorelease];
    totalLabel.textAlignment = UITextAlignmentLeft;
    totalLabel.textColor = [UIColor blackColor];
    totalLabel.font = [UIFont systemFontOfSize:12];
    totalLabel.backgroundColor = [UIColor clearColor];
    totalLabel.layer.borderColor = [UIColor grayColor].CGColor;
    totalLabel.tag = 4;

    [cellView addSubview:idLabel];
    [cellView addSubview:statusLabel];
    [cellView addSubview:orderDate];
    [cellView addSubview:byLabel];
    [cellView addSubview:totalLabel];

}

cellView = (UIView *)[cell.contentView viewWithTag:10];
imgView = (UIImageView *)[cellView viewWithTag:5];
idLabel = (UILabel *)[cellView viewWithTag:0];
statusLabel = (UILabel *)[cellView viewWithTag:1];
orderDate = (UILabel *)[cellView viewWithTag:2];
byLabel = (UILabel *)[cellView viewWithTag:3];
totalLabel = (UILabel *)[cellView viewWithTag:4];

x = [records count];
//NSLog(@" total number of row: %d",x);
if(y<x){
    NSLog(@"%d",y);
    //[self performSelector:@selector(tabledata:) withObject:[NSNumber numberWithInt:y]  afterDelay:0.0];
    if(y == indexPath.section){
    idLabel.text = [NSString stringWithFormat:@"Order Id: %@",[[records objectAtIndex:y] objectAtIndex:0]];
    statusLabel.text = [NSString stringWithFormat:@"Status: %@",[[records objectAtIndex:y] objectAtIndex:1]];
    orderDate.text = [NSString stringWithFormat:@"Date: %@",[[records objectAtIndex:y] objectAtIndex:2]];
    byLabel.text = [NSString stringWithFormat:@"By: %@",[[records objectAtIndex:y] objectAtIndex:3]];
    totalLabel.text = [NSString stringWithFormat:@"Total: %@",[[records objectAtIndex:y] objectAtIndex:4]];
    y++;

    }
}

刷新代码表...

  - (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView {
if (isLoading) return;
isDragging = YES;
}

- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
if (isLoading) {
    // Update the content inset, good for section headers
    if (scrollView.contentOffset.y > 0){
        NSLog(@"scrollView.contentOffset.y 1= %d",scrollView.contentOffset.y );
        tableview.contentInset = UIEdgeInsetsZero;
    }
    else if (scrollView.contentOffset.y >= -REFRESH_HEADER_HEIGHT){
        NSLog(@"scrollView.contentOffset.y 2= %d",scrollView.contentOffset.y  );
        tableview.contentInset = UIEdgeInsetsMake(-scrollView.contentOffset.y, 0, 0, 0);
    }
} else if (isDragging && scrollView.contentOffset.y < 0) {
    // Update the arrow direction and label
    [UIView beginAnimations:nil context:NULL];
    if (scrollView.contentOffset.y < -REFRESH_HEADER_HEIGHT) {
        // User is scrolling above the header
        NSLog(@"scrollView.contentOffset.y 3= %d",scrollView.contentOffset.y      );
        refreshLabel.text = self.textRelease;
        [refreshArrow layer].transform = CATransform3DMakeRotation(M_PI, 0, 0, 1);
    } else { // User is scrolling somewhere within the header
        refreshLabel.text = self.textPull;
        [refreshArrow layer].transform = CATransform3DMakeRotation(M_PI * 2, 0, 0, 1);
    }
    [UIView commitAnimations];
   }
}

 - (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate {
   if (isLoading) return;
   isDragging = NO;
   if (scrollView.contentOffset.y <= -REFRESH_HEADER_HEIGHT) {
    // Released above the header
    [self startLoading];
   }
 }


return cell;
}

还有其他问题请告诉我...我很早就需要这个解决方案...

提前致谢

Answer 1

尝试将“MyIdentifier”更改为“nil”
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:nil];

希望这能成功！和平