get instance of specific row in uitableview - ios

Question

So, I think my problem is straightforward but I can't figure out how to do it:
I have UITableView inside of UIViewController. Let's say tableView has 50 cells. So the question is how can I get instance of exactly 3'rd cell from the top (for example). For example I want just to change background color of third cel from the top.
My code look like this:
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: cellId, for: indexPath)
cell.textLabel?.text = dataArray[indexPath.row]
if indexPath.row == 3 {
cell.backgroundColor = UIColor.init(white: 0.9, alpha: 1)
}
return cell
}
I know this code will not work because cells dequeuing.

Answer 1

You could change the color of the 3rd cell in different ways.
I think, in this case, you're missing the else block in order to reset the background for other cells that will dequeue the same object.

Answer 2

Your code is correct you just need to account for the else case.
if indexPath.row == 3 {
cell.backgroundColor = UIColor(white: 0.9, alpha: 1)
} else {
//reset your cell to default so dequeue will work correctly
}

Answer 3

if want to change color in cellforrowAtindexpath then:
if indexPath.row == 3 {
cell.backgroundColor = UIColor(white: 0.4, alpha: 1)
} else {
//reset your cell to default so dequeue will work correctly
}
/**************/
if out Side that function then
let Cell = tableView.cellForRow(at: IndexPath(row: 3, section: 0))
cell.backgroundColor = UIColor(white: 0.4, alpha: 1)

Answer 4

If you mean you want the third from the top of the screen then J=just use visibleCells
let cell = tableView.visibleCells[2]
If you mean you want the third cell in the tableView then your code is almost correct. The third cell is at row 2, because the first cell is at row 0. To trigger the change you would call tableView.reloadRows
tableView.reloadRows(at: [IndexPath(row: 2, section: 0)], with: .automatic)