Table view cell label get changed after scrolling and get wrong value in it how to solve it?

Question

every time I scroll up or down value get changed with wrong value at 1st it shows correct value but after scrolling it get changed every time.

public func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell{
    //creating a cell using the custom class
    let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! ShowPercentageAttandanceTableViewCell




    cell.rollNo.text = String(describing: self.mainArrayRoll[indexPath.row])


        var location = Int()

        for item in self.rollPercentage {
            if item.rollCall == indexPath.row {
                location = item.absentCount  
                cell.percentage.text=String(location)
                }

            else if cell.percentage.text==("Label")
            {

                cell.percentage.text=String("0")
            }

    }


    return cell
    }

Here is the code.

[![Here in image 2 label is having text =2 and gray color label is having text 0 but it automatically get change after scroll as shown in image 2[![image 2 label changes after scroll but it is showing wrong][2]][2]

Answer 1

You are failing to set the cell.percentage.text to "0" when you didn't find the value you were looking for and you had a reused cell.

Try this:

if let item = self.rollPercentage.first(where: { $0.rollCall == indexPath.row }) {
    location = item.absentCount  
    cell.percentage.text = String(location)
} else {
    cell.percentage.text = "0"
}