UITableView复用导致数据折叠

之前一直xib自定义cell了，今天心血来潮整了个纯代码自定义cell，上下滑动时发现复用的cell原数据未清空，导致cell展示的数据发生重叠，贴一下出错代码：

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

static NSString *identifier=@"OrderListDetailCell";
UITableViewCell *cell = [self.tableview dequeueReusableCellWithIdentifier:identifier];

if(cell == nil){
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identifier];

}

UIImageView *goodsImg = [[UIImageView alloc]initWithFrame:CGRectMake(5, 5, 100, 70)];
UILabel *goodsName = [[UILabel alloc] initWithFrame:CGRectMake(5+goodsImg.frame.size.width+5, 0, UIScreenWidth-(5+goodsImg.frame.size.width+5+5), 40)];
goodsName.font = [UIFont systemFontOfSize:14];
goodsName.numberOfLines = 2;

UILabel * goodsCount = [[UILabel alloc] initWithFrame:CGRectMake(5+goodsImg.frame.size.width+5, 50, 100, 15)];
goodsCount.font = [UIFont systemFontOfSize:14];
UILabel *goodsPrice = [[UILabel alloc] initWithFrame:CGRectMake(5+goodsImg.frame.size.width+5+100+5, 50, 180, 20)];
goodsPrice.font = [UIFont systemFontOfSize:14];

NSDictionary *goodsDic = (NSDictionary *)[_cellGoodsInfo objectAtIndex:indexPath.row];
//展示商品详情
[goodsImg sd_setImageWithURL:[NSURL URLWithString:[NSString stringWithFormat:@"%@%@",LoadImageURL,[goodsDic objectForKey:@"goodsImage"]]]];
goodsName.text =[NSString stringWithFormat:@"%@",[goodsDic objectForKey:@"goodsName"]];
goodsCount.text =[NSString stringWithFormat:@"共:%@ 元",[goodsDic objectForKey:@"goodsTotalPrice"]];
goodsPrice.text =[NSString stringWithFormat:@"件数:%@",[goodsDic objectForKey:@"goodsCount"]];

[cell.contentView addSubview:goodsImg];
[cell.contentView addSubview:goodsName];
[cell.contentView addSubview:goodsPrice];
[cell.contentView addSubview:goodsCount];

cell.backgroundColor = RGBCOLOR(236, 236, 236, 1);
return cell;
}

修改后为如下代码，问题解决：

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

NSString *identifier=@"OrderListDetailCell";
UITableViewCell *cell = [self.tableview dequeueReusableCellWithIdentifier:identifier];

if(cell == nil){
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identifier];

UIImageView *goodsImg = [[UIImageView alloc]initWithFrame:CGRectMake(5, 5, 100, 70)];
UILabel *goodsName = [[UILabel alloc] initWithFrame:CGRectMake(5+goodsImg.frame.size.width+5, 0, UIScreenWidth-(5+goodsImg.frame.size.width+5+5), 40)];
goodsName.font = [UIFont systemFontOfSize:14];
goodsName.numberOfLines = 2;

UILabel * goodsCount = [[UILabel alloc] initWithFrame:CGRectMake(5+goodsImg.frame.size.width+5, 50, 100, 15)];
goodsCount.font = [UIFont systemFontOfSize:14];
UILabel *goodsPrice = [[UILabel alloc] initWithFrame:CGRectMake(5+goodsImg.frame.size.width+5+100+5, 50, 180, 20)];
goodsPrice.font = [UIFont systemFontOfSize:14];
[goodsImg setTag:1];
[goodsName setTag:2];
[goodsCount setTag:3];
[goodsPrice setTag:4];

[cell.contentView addSubview:goodsImg];
[cell.contentView addSubview:goodsName];
[cell.contentView addSubview:goodsPrice];
[cell.contentView addSubview:goodsCount];
}

UIImageView *a1 = (UIImageView *)[cell.contentView viewWithTag:1];
UILabel *a2 = (UILabel *)[cell.contentView viewWithTag:2];
UILabel *a3 = (UILabel *)[cell.contentView viewWithTag:3];
UILabel *a4 = (UILabel *)[cell.contentView viewWithTag:4];

NSDictionary *goodsDic = (NSDictionary *)[_cellGoodsInfo objectAtIndex:indexPath.row];
//展示商品详情
[a1 sd_setImageWithURL:[NSURL URLWithString:[NSString stringWithFormat:@"%@%@",LoadImageURL,[goodsDic objectForKey:@"goodsImage"]]]];
a2.text =[NSString stringWithFormat:@"%@",[goodsDic objectForKey:@"goodsName"]];
a3.text =[NSString stringWithFormat:@"共:%@ 元",[goodsDic objectForKey:@"goodsTotalPrice"]];
a4.text =[NSString stringWithFormat:@"件数:%@",[goodsDic objectForKey:@"goodsCount"]];

cell.backgroundColor = RGBCOLOR(236, 236, 236, 1);
return cell;
}