请参阅以下附件图片。我想从
UITableViewCell. 如何从表格视图单元格中删除白色。? 

这是我的代码:
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
   {
        static NSString *CellIdentifier = @"Cell";
        UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    cell=nil;
        if (cell == nil) {
         cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
       }
        Schedule *sch=(Schedule*)[tableDataList objectAtIndex:indexPath.row];
        NSString*ptime=@"";
      if(sch.ptime.length<8){
        ptime=[ptime stringByAppendingString:@"  "];
        ptime=[ptime stringByAppendingString:sch.ptime];
     }
    else
   {
     ptime=[ptime stringByAppendingString:sch.ptime];
  }
    UILabel *lbPTime=[[UILabel alloc]initWithFrame:CGRectMake(5, 10, 80, 25)];
    lbPTime.font=[UIFont fontWithName:@"Zawgyi-One" size:15];
    lbPTime.textColor=[UIColor whiteColor];
   [lbPTime setText:ptime];
   NSString*pname=@"";
   pname=[pname stringByAppendingString:sch.pname];
   pname=[pname stringByAppendingString:@" "];
   UILabel *lbPName=[[UILabel alloc]initWithFrame:CGRectMake(lbPTime.frame.size.width, 10, 250, 25)];
   lbPName.font=[UIFont fontWithName:@"Zawgyi-One" size:15];
  CGSize maximumLabelSize=CGSizeMake(296, 9999);
  CGSize expectedLabelSize= [pname sizeWithFont:lbPName.font
                                            constrainedToSize:maximumLabelSize
                                                lineBreakMode:lbPName.lineBreakMode];
  CGRect newFrame=lbPName.frame;
  newFrame.size.height=expectedLabelSize.height;
  newFrame.size.width=expectedLabelSize.width;
  lbPName.frame=newFrame;
  lbPName.numberOfLines=0;
  lbPName.lineBreakMode=UILineBreakModeWordWrap;
  lbPName.textColor=[UIColor whiteColor];
  [lbPName setText:pname];
  [cell.contentView addSubview:lbPTime];
  [cell.contentView addSubview:lbPName];
  [cell.contentView sizeToFit];
  UIView *v = [[UIView alloc]init];
  v.backgroundColor = self.tableview.backgroundColor;//[UIColor clearColor];
  cell.selectedBackgroundView = v;
  cell.backgroundColor=[UIColor clearColor];
  return cell;
}