Can't un check all cell before check one swift 2 - swift

Question

I m using swift 2 and UITableViews and when I press a cell a checkmark appear, but I wan't that only one cell can be checked in my tableview so the other checkmarks will disappear from my tableview. I tried different technics without success. I have a CustomCell with just a label.
Here is my code :
import UIKit
class MyViewController: UIViewController, UITableViewDataSource, UITableViewDelegate{
#IBOutlet weak var tableView: UITableView!
var answersList: [String] = ["One","Two","Three","Four","Five"]
override func viewDidLoad() {
super.viewDidLoad()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return answersList.count
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("MyCustomCell", forIndexPath: indexPath) as! MyCustomCell
cell.displayAnswers(answersList[indexPath.row]) // My cell is just a label
return cell
}
// Mark: Table View Delegate
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
// Element selected in one of the array list
tableView.deselectRowAtIndexPath(indexPath, animated: true)
if let cell = tableView.cellForRowAtIndexPath(indexPath) {
if cell.accessoryType == .Checkmark {
cell.accessoryType = .None
} else {
cell.accessoryType = .Checkmark
}
}
}
}

Answer 1

Assuming you've only section here's what you can do
// checkmarks when tapped
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
let section = indexPath.section
let numberOfRows = tableView.numberOfRowsInSection(section)
for row in 0..<numberOfRows {
if let cell = tableView.cellForRowAtIndexPath(NSIndexPath(forRow: row, inSection: section)) {
cell.accessoryType = row == indexPath.row ? .Checkmark : .None
}
}
}

Answer 2

Fixed code from #SirH to work with Swift 3
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
tableView.deselectRow(at: indexPath, animated: true)
let section = indexPath.section
let numberOfRows = tableView.numberOfRows(inSection: section)
for row in 0..<numberOfRows {
if let cell = tableView.cellForRow(at:IndexPath(row: row, section: section)) {
cell.accessoryType = row == indexPath.row ? .checkmark : .none
}
}
}