ios - 进入横向模式后，tableHeader 和 tableView 之间出现白线？

Question

我制作了一个 tableView，它在段按钮更改时加载数据。它运行良好。我已将 tableView 背景颜色设置为一些 RGB 值并在其上应用自定义标题。我的代码如下：-

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    BestFCell *bfcell=(BestFCell*)[tableView dequeueReusableCellWithIdentifier:@"bestfcellIdentifier"];

    if (bfcell==nil) {
        NSArray *topLevelObjects=[[NSBundle mainBundle] loadNibNamed:@"BestFCell" owner:self options:nil];
        for (id temp in topLevelObjects) {
            if ([temp isKindOfClass:[BestFCell class]]) {
                bfcell=(BestFCell*)temp;
            }
        }
    }

    if (segmentCntr.selectedSegmentIndex==0) {
        bfcell.bestsize.text=[[[bestfiveArray objectAtIndex:indexPath.row] valueForKey:[NSString stringWithFormat:@"bestbuysize%i",indexPath.row+1]] valueForKey:@"text"];
        bfcell.bestprice.text=[[[bestfiveArray objectAtIndex:indexPath.row] valueForKey:[NSString stringWithFormat:@"bestbuyprice%i",indexPath.row+1]] valueForKey:@"text"];
    }else{
        bfcell.bestsize.text=[[[bestfiveArray objectAtIndex:indexPath.row] valueForKey:[NSString stringWithFormat:@"bestsellsize%i",indexPath.row+1]] valueForKey:@"text"];
        bfcell.bestprice.text=[[[bestfiveArray objectAtIndex:indexPath.row] valueForKey:[NSString stringWithFormat:@"bestsellprice%i",indexPath.row+1]] valueForKey:@"text"];
    }

    return bfcell;
}

//表格自定义标题视图。

 - (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{
    BestFCell *bfcell=(BestFCell*)[tableView dequeueReusableCellWithIdentifier:@"bestfcellIdentifier"];

    if (bfcell==nil) {
        NSArray *topLevelObjects=[[NSBundle mainBundle] loadNibNamed:@"BestFCell" owner:self options:nil];
        for (id temp in topLevelObjects) {
            if ([temp isKindOfClass:[BestFCell class]]) {
                bfcell=(BestFCell*)temp;
            }
        }
    }

    bfcell.bestsize.text=@"Best Buy Size";
    bfcell.bestprice.text=@"Best Buy Price";

    bfcell.bestsize.font=[UIFont systemFontOfSize:14.0f];
    bfcell.bestprice.font=[UIFont systemFontOfSize:14.0f];

    return bfcell;
}

并将页脚设置为零

- (UIView *)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section
{
    UIView *view=[[UIView alloc] init];
    return view;
}

一切都很好，但是为什么在获取横向模式时会出现白线。我的屏幕截图如下：-纵向

在横向模式下

谢谢 ！..