swift - paginate tableview data from API - ios

Question

Please advice how can I paginate my tableview. I get data from the CocktailDB API and parse JSON with Decodable. There are categories and drinks from these categories.
I want to firstly load 10 drinks and then load more when I scroll to the bottom of the page.
I considered using willDisplay method by tableview.
Thank you in advance!
My code:
class ViewController: UIViewController {
struct OneCategory {
let name : String
var drinks : [Drink]
}
var drinks = [Drink]()
var categories = [OneCategory]()
var selectedCategoriesArr: [String] = []
#IBOutlet weak var tableView: UITableView!
override func viewDidLoad() {
super.viewDidLoad()
loadAllCategories()
}
func loadAllCategories() {
let url = URL(string: "https://www.thecocktaildb.com/api/json/v1/1/list.php?c=list")
URLSession.shared.dataTask(with: url!) { (data, response, error) in
if let error = error {
print(error)
return
}
do {
let result = try JSONSerialization.jsonObject(with: data!) as! [String:Any]
let categoryNames = (result["drinks"] as! [[String:String]]).map{$0["strCategory"]!}
let group = DispatchGroup()
for category in categoryNames {
let categoryURLString = "https://www.thecocktaildb.com/api/json/v1/1/filter.php?c=\(category)"
.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)!
let categoryURL = URL(string: categoryURLString)!
group.enter()
let categoryTask = URLSession.shared.dataTask(with: categoryURL) { (categoryData, _, categoryError) in
defer {
group.leave()
}
if let categoryError = categoryError {
print(categoryError)
return
}
do {
let drinks = try JSONDecoder().decode(Response.self, from: categoryData!).drinks
self.categories.append(OneCategory(name: category, drinks: drinks))
} catch {
print(error)
}
}
categoryTask.resume()
}
group.notify(queue: .main) {
self.tableView.reloadData()
}
} catch {
print(error)
}
}.resume()
}
}
extension ViewController: UITableViewDataSource, UITableViewDelegate {
func numberOfSections(in tableView: UITableView) -> Int {
return categories.count
}
func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
return categories[section].name
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return categories[section].drinks.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "drinkCell") as! DrinkCell
let category = categories[indexPath.section]
let drink = category.drinks[indexPath.row]
cell.drinkName.text = drink.strDrink
let url = drink.strDrinkThumb
cell.drinkImage.downloaded(from: url)
return cell
}
}
Models:
struct Response:Decodable {
var drinks: [Drink]
}
struct Drink:Decodable {
var strDrink: String
var strDrinkThumb: String
}
struct Categories:Decodable {
var drinks: [Category]
}
struct Category:Decodable {
var strCategory: String
}