Question

我是iphone的新手。滚动表格视图时，我的cutomcell label值正在消失。

再次出现在我点击该单元格时。

任何人都可以帮助我吗？

先谢谢。

//table view in view controller created in xib


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

{

static NSString *CellIdentifier = @"ListOfProductsCell";

ListOfProductsCell *cell = (ListOfProductsCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];

if (cell==nil) {
        NSArray *nib =[[NSBundle mainBundle] loadNibNamed:@"ListOfProductsCell" owner:self options:nil];
    cell = [nib objectAtIndex:0];

    productItemDit=[productListArry objectAtIndex:indexPath.row];
    NSString *offerStr= [NSString stringWithFormat:@"%.2f",[[productItemDit objectForKey:@"offer"] floatValue]];
    NSString *fullCostStr=[[currencyCodeStr stringByAppendingString:@" "] stringByAppendingString:offerStr];
    NSLog(@"%@",fullCostStr);
    cell.itemCostLbl.text=fullCostStr;

} else {
    cell.itemStepper = (UIStepper *) [cell viewWithTag:2];
    cell.itemAddedLbl =(UILabel*)[cell viewWithTag:1];

}

if (tableView == self.searchDisplayProduct.searchResultsTableView) {
    searchProductItemDit=[searchProductListArry objectAtIndex:indexPath.row];
    NSLog(@"searchdit:%@",searchProductItemDit);
    cell.itemNameLbl.text= [searchProductItemDit objectForKey:@"name"];
    self.searchDisplayProduct.searchResultsTableView.separatorColor=[UIColor colorWithRed:200.0 green:0.0 blue:0.0 alpha:1.0];
} else {
    productItemDit=[productListArry objectAtIndex:indexPath.row];
    NSLog(@"dit:%@",productItemDit);
    cell.itemNameLbl.text=[productItemDit objectForKey:@"name"];
}

cell.itemAddedLbl.text = [[NSString alloc] initWithFormat:@"%d",itemCount];

cell.itemImg.image = [UIImage imageNamed:@"profp.jpg"];

return cell;

}

Answer 1

通过这样做解决

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

{

          static NSString *CellIdentifier = @"ListOfProductsCell";

          ListOfProductsCell *cell = (ListOfProductsCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];

         if (cell==nil) {
                   NSArray *nib =[[NSBundle mainBundle] loadNibNamed:@"ListOfProductsCell" owner:self options:nil];
                   cell = [nib objectAtIndex:0];

         } else {
                cell.itemStepper = (UIStepper *) [cell viewWithTag:2];
                cell.itemAddedLbl =(UILabel*)[cell viewWithTag:1];

         }

        if (tableView == self.searchDisplayProduct.searchResultsTableView) {
                  cell.itemNameLbl.text= [[searchProductListArry objectAtIndex:indexPath.row] objectForKey:@"name"];
        } else {
               cell.itemNameLbl.text=[[productListArry objectAtIndex:indexPath.row] objectForKey:@"name"];
        } 

        cell.itemCostLbl.text=[NSString stringWithFormat:@"%@  %.2f", currencyCodeStr , [[[productListArry objectAtIndex:indexPath.row] objectForKey:@"offer"] floatValue]];

        cell.itemAddedLbl.text = [[NSString alloc] initWithFormat:@"%d",itemCount];

        cell.itemImg.image = [UIImage imageNamed:@"profp.jpg"];

        return cell;

 }

Answer 2

由于您没有发布大量信息，这是我的猜测。当您滚动表视图时，它会在内部调用reloadData方法。您需要使用重用标识符来保留单元的状态。您可以在cellForRowAtIndexPath中初始化单元格，如：

static NSString *cellIdentifier = @"cellID";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

if (cell == nil)
{
    cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];
 // or cell initializing logic here for the custom cell
}

如果自定义单元格在xib中添加重用标识符并在cellForRowAtIndexPath方法中使用它

滚动表视图时自定义标签值正在消失

2 个答案: