Question

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath 
*)indexPath
{
    NSString *CellIdentifier = [NSString stringWithFormat:@"CellName-%d", [indexPath row]];

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) 
    {
        // etc
    }
}

I want to clear all the cells I’ve stored up since the table data has changed so they need to be regenerated. I am storing all the cells in this way deliberately.

I am wondering is there a way/method to dumb all the cells that are alive, that are related to a particular table.

Regards,
-Code

Answer 1

You can’t, also you when I look at your code you aren’t using any of the dequeued cells since you create a new cell for every row in you tableview.

This would mean then if you have a 1000 cells in your table a 1000 tabelviewcells are created. This will make you tableview very slow, also it will take up to musch memory.

When cells look the same should all give then the same cellIdentifier, then just fill the cell with the data from you data source.
You should only create a new cell when the dequeueReusableCellWithIdentifier: does not return any cells.

Then when [self.tableView reloadData] is called you just read the new value from the datasource and fill them in in the tableview cell.

You datasource is the place to stored state and not cells, because I can’t think of any other reason to have your datasource work this way.