Repeating values in Stepper inside TableViewCell when scrolling - xcode

Question

Stepper problem when cells need scroll.
My_TableViewCell.swift
import UIKit
class My_TableViewCell: UITableViewCell {
#IBOutlet weak var My_Label1: UILabel!
#IBOutlet weak var My_Label2: UILabel!
#IBOutlet weak var My_Stepper: UIStepper!
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
}
...
My_TableViewController.swift
import UIKit
var My_Ids = ["C01","C02","C03","C04","C05","C06","C07","C08","C09","C10"]
var My_Values = ["0","0","0","0","0","0","0","0","0","0"]
class My_TableViewController: UITableViewController {
#IBAction func My_Stepper(sender: AnyObject) {
let point = sender.convertPoint(CGPointZero, toView: tableView)
let indexPath = self.tableView.indexPathForRowAtPoint(point)!
let cell = self.tableView.cellForRowAtIndexPath(indexPath) as! My_TableViewCell
cell.My_Label2.text = "\(Int(cell.My_Stepper.value))"
}
...
// MARK: - Table view data source
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return My_Ids.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell =
self.tableView.dequeueReusableCellWithIdentifier(
"My_TableCell", forIndexPath: indexPath)
as! My_TableViewCell
let row = indexPath.row
cell.My_Label1.text = My_Ids[row]
cell.My_Label2.text = "\(Int(cell.My_Stepper.value))"
return cell
}
...
When all cells fit in a "page" the Stepper works well but if the cells are resized and you need scroll the tableview the values are repeated in other cells.
If you alter the value on the cells C06 and C07 this will to reflect C01 and C02 cells and vice-versa.
Please view this image showing the snapshots with the errors

Answer 1

UITableViewController intentionally reuses cells as an optimization. You need to clear the old cell settings as part of your solution. Add a prepareForReuse method to your My_TableViewCell class.
You do this:
- (void) prepareForReuse
{
[super prepareForReuse];
// clear previous cell settings
}
Additional Notes:
recommend against calling cellForRowAtIndexPath directly. See this thread.
recommend you use Pascal casing for class names: Use MyTableViewCell instead of My_TableViewCell.