if([_data count] == 0 ){
       [self.tableView setSeparatorStyle:UITableViewCellSeparatorStyleNone];//  [self tableView].=YES;
    } else {
      [self.tableView setSeparatorStyle:UITableViewCellSeparatorStyleSingleLine];////    [self tableView].hidden=NO;
    }

迅速:

public func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

    ...

    // remove separator for last cell
    cell.separatorInset = indexPath.row < numberOfRowsInSection-1
        ? tableView.separatorInset
        : UIEdgeInsets(top: 0, left: tableView.bounds.size.width, bottom: 0, right: 0)

    return cell
}

objective - c:

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

    ...

    // remove separator for last cell
    cell.separatorInset = (indexPath.row < numberOfRowsInSection-1)
        ? tableView.separatorInset
        : UIEdgeInsetsMake(0.f, tableView.bounds.size.width, 0.f, 0.f);

    return cell;
}

在viewDidLoad中添加这一行:

self.tableView.separatorColor = [UIColor clearColor];

在cellForRowAtIndexPath中:

适用于iOS低版本

if(indexPath.row != self.newCarArray.count-1){
    UIImageView *line = [[UIImageView alloc] initWithFrame:CGRectMake(0, 44, 320, 2)];
    line.backgroundColor = [UIColor redColor];
    [cell addSubview:line];
}

适用于iOS 7以上版本(包括iOS 8)

if (indexPath.row == self.newCarArray.count-1) {
    cell.separatorInset = UIEdgeInsetsMake(0.f, cell.bounds.size.width, 0.f, 0.f);
}

在ios7中，UITableView分组样式单元格分隔符看起来有点不同。它看起来有点像这样:

我尝试了凯梅纳兰的回答:

cell.separatorInset = UIEdgeInsetsMake(0, 10000, 0, 0);

然而，这似乎对我不起作用。我不知道为什么。所以我决定使用Hiren的答案，但使用UIView而不是UIImageView，并在iOS 7风格中画出界线:

UIColor iOS7LineColor = [UIColor colorWithRed:0.82f green:0.82f blue:0.82f alpha:1.0f];

//First cell in a section
if (indexPath.row == 0) {

    UIView *line = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 1)];
    line.backgroundColor = iOS7LineColor;
    [cell addSubview:line];
    [cell bringSubviewToFront:line];

} else if (indexPath.row == [self.tableViewCellSubtitles count] - 1) {

    UIView *line = [[UIView alloc] initWithFrame:CGRectMake(21, 0, self.view.frame.size.width, 1)];
    line.backgroundColor = iOS7LineColor;
    [cell addSubview:line];
    [cell bringSubviewToFront:line];

    UIView *lineBottom = [[UIView alloc] initWithFrame:CGRectMake(0, 43, self.view.frame.size.width, 1)];
    lineBottom.backgroundColor = iOS7LineColor;
    [cell addSubview:lineBottom];
    [cell bringSubviewToFront:lineBottom];

} else {

    //Last cell in the table view
    UIView *line = [[UIView alloc] initWithFrame:CGRectMake(21, 0, self.view.frame.size.width, 1)];
    line.backgroundColor = iOS7LineColor;
    [cell addSubview:line];
    [cell bringSubviewToFront:line];
}

如果使用这个，请确保在第二个If语句中插入正确的表视图高度。我希望这对某些人有用。

对于Swift 2:

将以下行添加到viewDidLoad():

tableView.separatorColor = UIColor.clearColor()

  if([_data count] == 0 ){
       [self.tableView setSeparatorStyle:UITableViewCellSeparatorStyleNone];//  [self tableView].=YES;
    } else {
      [self.tableView setSeparatorStyle:UITableViewCellSeparatorStyleSingleLine];////    [self tableView].hidden=NO;
    }