UITableview配件类型在滚动时消失

Question

我做了一个tableView,我需要选择多个选项.选项被选中,但是当我滚动表格视图时,复选标记选项消失,其他一些行显示该复选标记.这是我在代码didselectedrowAtindex的方法table_option是UITableView和selectedcells是NSMutableArray

[table_option deselectRowAtIndexPath:indexPath animated:YES];
NSNumber *rowNsNum = [NSNumber numberWithUnsignedInt:indexPath.row];
if ( [selectedCells containsObject:rowNsNum]  )
{
    if (cell.accessoryType == UITableViewCellAccessoryCheckmark) 
        cell.accessoryType = UITableViewCellAccessoryNone;
    else 
        cell.accessoryType = UITableViewCellAccessoryCheckmark;



    [selectedCells removeObject:rowNsNum];
    sel.text=@"Select";
   // cell.accessoryType = UITableViewCellAccessoryNone;

}
    else 
{
    if (cell.accessoryType == UITableViewCellAccessoryCheckmark) 
        cell.accessoryType = UITableViewCellAccessoryNone;
    else 
        cell.accessoryType = UITableViewCellAccessoryCheckmark;

    [selectedCells addObject:rowNsNum];
   sel.text=@"Selected";
   // cell.accessoryType = UITableViewCellAccessoryCheckmark;

}



[table_option reloadData];

请尽快帮忙

Answer 1

您需要检查方法中是否已选择单元格cellForRowAtIndexPath.出现此问题的原因是tableView重新使用单元格.请在您的cellForRowAtIndexPath方法中写下以下代码,它将解决问题.

NSNumber *rowNsNum = [NSNumber numberWithUnsignedInt:indexPath.row];
if ( [selectedCells containsObject:rowNsNum]  )
{
    cell.accessoryType = UITableViewCellAccessoryCheckmark;
}
else
{
    cell.accessoryType = UITableViewCellAccessoryNone;
}