How can you ensure reusing table cells for resource optimization?

For cell reuse in an iOS table, a cell reuse mechanism using identifiers is employed.

Main steps:

1. Register the cell class or nib with a unique identifier.
2. In the tableView(_:cellForRowAt:) method, call dequeueReusableCell(withIdentifier:) to obtain a reusable cell.
3. Configure the cell with the current data.

This approach avoids creating a new cell for each row, instead reusing existing ones, which significantly saves memory and improves performance.

Example in Swift:

let cell = tableView.dequeueReusableCell(withIdentifier: "MyCell", for: indexPath)
cell.textLabel?.text = data[indexPath.row]
return cell

Thus, the system maintains a pool of cells and reuses them as the table scrolls.