CollectionView issue - Swift - ios

Question

I make music player using collectionView. I want to when selected collectionView like radio button. If another cell is selected, the selected cell should not be selected. but is not working.
I dont want multi selection. : https://i.stack.imgur.com/ATj3J.png
How do I work? TT I need your help. thx.
this my code.
import UIKit
class PracticeViewController: UIViewController, UICollectionViewDelegate, UICollectionViewDataSource {
var homeClassInPrac = HomeViewController()
var songPlayOff = UIImage(named: "play")
var songPlayOn = UIImage(named: "iconStop")
var buttonCounter = [Int]()
var freqNameList = ["Delta 1","Theta 1","Alpha 1","Beta 1","Delta 2","Theta 2","Alpha 2","Beta 2","Delta 3","Theta 3","Alpha 3","Beta 3","Delta 4","Theta 4","Alpha 4","Beta 4"]
#IBOutlet var practiceCollection: UICollectionView!
override func viewDidLoad() {
super.viewDidLoad()
practiceCollection.delegate = self
practiceCollection.dataSource = self
self.practiceCollection.allowsMultipleSelection = false
}
func numberOfSections(in collectionView: UICollectionView) -> Int {
return 1
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
self.practiceCollection.reloadData()
return freqNameList.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell:PracticeCollectionViewCell = collectionView.dequeueReusableCell(withReuseIdentifier: "pracCell", for: indexPath) as! PracticeCollectionViewCell
cell.pracImgView.image = songPlayOff
cell.pracLabel.text = freqNameList[indexPath.row]
if buttonCounter.contains(indexPath.row){
cell.pracImgView.image = songPlayOn
}
else{
cell.pracImgView.image = songPlayOff
}
return cell
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
if buttonCounter.contains(indexPath.row){
let index = buttonCounter.index(of: indexPath.row)
buttonCounter.remove(at: index!)
self.practiceCollection.reloadData()
homeClassInPrac.audioPlayer2.stop()
}
else{
buttonCounter.removeAll()
buttonCounter.append(indexPath.row)
self.practiceCollection.reloadData()
let buttonInt = buttonCounter[0]
homeClassInPrac.playSound2(freqName: freqNameList[buttonInt])
}
print("Select\(buttonCounter)")
}
func collectionView(_ collectionView: UICollectionView, didDeselectItemAt indexPath: IndexPath) {
print("Deselect\(buttonCounter)")
let index = buttonCounter.index(of: indexPath.row)
buttonCounter.remove(at: index!)
self.practiceCollection.reloadData()
print("Deselect\(buttonCounter)")
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}

Answer 1

I think problem is you are reloading collectionView in numberOfItems method
so Just remove
self.practiceCollection.reloadData()

Answer 2

Change buttonCounter to Array of Bool with equal count to freqNameList
var buttonCounter : Array<Bool> = [false,false,false,false,false,false,false,false,false,false,false,false,false,false,false,false]
In cellForItem method use :
if buttonCounter[indexPath.row]{
cell.pracImgView.image = songPlayOn
}
else{
cell.pracImgView.image = songPlayOff
}
In didSelectItem use :
buttonCounter[indexPath.row] = true
homeClassInPrac.playSound2(freqName: freqNameList[buttonInt])
self.practiceCollection.reloadData()
In didDeselectItem use :
buttonCounter[indexPath.row] = false
self.practiceCollection.reloadData()