Getting data but not able to display correctly - ios

Question

I am fetching some data and displaying in my screen.
func getAllCatogory(){
ViewUtils.addActivityView(view: self.view)
TransportManager.sharedInstance.AllCatogory { (dt, err) in
ViewUtils.removeActivityView(view: self.view)
if let _ = err{
}else{
do {
let decoder = JSONDecoder()
decoder.keyDecodingStrategy = .convertFromSnakeCase
guard let str = dt as? String else { return }
let res = try decoder.decode([AllCatagories].self, from:str.data(using: .utf8)!)
self.allCategory = res
self.collectionView.reloadData()
print(res.count) // getting count 2
print(self.allCategory.count as Any) getting count 2
}
catch {
print(error)
}
}
}
}
But in my collection view when i am going to append or print its not coming.
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "HomeCollectionCell", for: indexPath) as! HomeCollectionCell
let ct = self.allCategory[indexPath.item]
print(ct.menuName as Any) // getting null
//cell.productName.text = ct.menuName
return cell
}
Not sure what might be an issue.Any help on this ??
Thanks in advance !
Update :
class AllCatagories: Codable{
let image : String?
let isActive : Int?
let items : [Item]?
let menuCode : String?
let menuName : String?
enum CodingKeys: String, CodingKey {
case image
case isActive = "is_active"
case items
case menuCode = "menu_code"
case menuName = "menu_name"
}
}
struct Item : Codable {
let menuCode : String?
let name : String?
enum CodingKeys: String, CodingKey {
case menuCode = "menu_code"
case name
}
}
here is my model class which i am using for.Main thread to reload the collection view means where exactly ?
Update :
[
{
"menu_code" : "NDS",
"items" : [
{
"unit" : "Nos",
"name" : "Chapathi\/Pulkas",
"quantity" : 2
},
{
"unit" : "Cup",
"name" : "Palya\/Curry",
"quantity" : 1
}
],
"is_active" : 1,
"image" : "nds.jpg",
"menu_name" : "Normal Diet South"
},
{
"menu_code" : "NCCD",
"items" : [
{
"menu_code" : "NDS",
"name" : "Monday"
},
{
"menu_code" : "NDN",
"name" : "Tuesday"
}
],
"is_active" : 1,
"image" : "NCCD.jpg",
"menu_name" : "Normal Combo Corporate Diet"
}
]
my json response is here

Answer 1

If you specify convertFromSnakeCase you have to delete the coding keys, that's the purpose of convertFromSnakeCase
And declare the members / properties as much as possible non-optional, not the contrary. In this particular case you would get a Decoding error.
struct AllCatagories: Codable {
let image : String
let isActive : Int
let items : [Item]
let menuCode : String
let menuName : String
}
struct Item : Codable {
let unit : String?
let name : String
let quantity : Int?
let menuCode : String?
}
And reload the collection view on the main thread
DispatchQueue.main.async {
self.collectionView.reloadData()
}