Problem adding Values in Array in coolectionView - Swift - swift

Question

I pull data from the database. I am separating the data I have taken according to the number of CATEGORIDAVTOPLAM.count. For example, there is 4 data in the first section and 3 data in the second section. However, while the data in 2.section should be 5.6.7 items in the new DavFile array, 1.2.7 in Array. attracts the next data. How can I add data by counting in the section in a single directory? When I do as follows, I have 7 data in total as follows. The ranking in the first section is 1.2.3.4 in Array, and the ranking in the second section is 1.2.7. values.
func getIndexForArray(with indexPath:IndexPath)->Int{
var itemIndex = 0
if indexPath.row != 0{
for _ in 0..<indexPath.section{
itemIndex += (sonsuzCollec.numberOfItems(inSection: indexPath.section) - 1)
}
return (itemIndex + indexPath.row)
}else{
return indexPath.row
}
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return Int(KATEGORIDAVTOPLAM[section]) ?? 0 }
func numberOfSections(in collectionView: UICollectionView) -> Int {
return yeniDavKATIsımNew.count }
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cellSonsuz", for: indexPath) as! sonsuzCell
let currentIndex = getIndexForArray(with: indexPath)
if currentIndex < yeniDavFile.count{
let urlNew = URL(string: yeniDavFile[currentIndex])
cell.davetiyeFoto.sd_setImage(with: urlNew)
return cell
}else{
return UICollectionViewCell()
}
#objc func kategoriSaydırNew(){
...
if let baslik = try JSONSerialization.jsonObject(with: data, options: []) as? [[String: Any]] {
for review in baslik {
if let soru_baslik = review["davetiyefilee"] as? String {
let s = String(describing: soru_baslik)
self.yeniDavFile.append(s)
} }
DispatchQueue.main.async { self.sonsuzCollec.reloadData() }}
if let baslik = try JSONSerialization.jsonObject(with: data, options: []) as? [[String: Any]] {
for review in baslik {
if let soru_baslik = review["TOPLAM"] as? Int {
let s = String(describing: soru_baslik)
self.KATEGORIDAVTOPLAM.append(s)
} }
DispatchQueue.main.async {
self.sonsuzCollec.reloadData()
}