Prevent tableview cell recycle label value - ios

Question

I have a tableview with custom cell that contain 1 label and 1 button. The button is use for everytime I tap it, increase the number inside label, example if my label value is 0 then everytime I tap the button it is increase by 1
The problem is I have a lot of data, example I have 20 and everytime I set a value for the label when I scroll all the value is changed
this is my code:
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("testCell", forIndexPath: indexPath)
let pos = cell.viewWithTag(6) as! UIButton
pos.addTarget(self, action: #selector(testTableViewController.pos(_:)), forControlEvents: .TouchUpInside)
pos.tag = indexPath.row
return cell
}
func pos(sender: UIButton) {
let position: CGPoint = sender.convertPoint(CGPointZero, toView: self.tableView)
let indexPath = self.tableView.indexPathForRowAtPoint(position)
let cell: UITableViewCell = self.tableView.cellForRowAtIndexPath(indexPath!)! as UITableViewCell
let countNo = cell.viewWithTag(7) as! UILabel
var counter:Int = Int(countNo.text!)!
counter = counter + 1
countNo.text = String(counter)
}
please help me how to solve this problem. I have search a lot of web to find the answer, example like make dequeueReusableCellWithIdentifier nil but in Swift 2 dequeueReusableCellWithIdentifier never nil and a lot more with no one is work
I need some hint how to solve this problem

Answer 1

Here is your answer.
Initialise one array having number of objects same as your tableview's number of row. Initially insert value "0" or blank string (if do not want to display any number in label initially) for each object.
ex,
var arrValues:NSMutableArray = NSMutableArray()
for _ in 1...numberOfrow
{
arrValues.addObject("0")
}
Now in cellForRowAtIndexPath method , display text of label from this array
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("testCell", forIndexPath: indexPath)
let pos = cell.viewWithTag(6) as! UIButton
**let countNo = cell.viewWithTag(7) as! UILabel
countNo.text = String(arrValues.objectAtIndex(indexPath.row))**
pos.addTarget(self, action: #selector(testTableViewController.pos(_:)), forControlEvents: .TouchUpInside)
pos.tag = indexPath.row
return cell
}
On button click method replace object at particular index with incremented number. See your updated method as below.
func pos(sender: UIButton) {
let position: CGPoint = sender.convertPoint(CGPointZero, toView: self.tableView)
let indexPath = self.tableView.indexPathForRowAtPoint(position)
let cell: UITableViewCell = self.tableView.cellForRowAtIndexPath(indexPath!)! as UITableViewCell
let countNo = cell.viewWithTag(7) as! UILabel
var counter:Int = Int(countNo.text!)!
counter = counter + 1
countNo.text = String(counter)
**arrValues.replaceObjectAtIndex(indexPath.row, withObject: String(counter))**
}
So in cellForRowAtIndexPath , it will display updated number in label text