TableViewController with duplicate items of list

Question

I m building iOS application using swift 4.2 and I have a TableViewController that have a strange behaviour.

This is the code:

import UIKit

class StoreByCategoryViewController: UITableViewController{
    
    @IBOutlet var storeTableView: UITableView!
    
    var categorySelected:CategoryModel?
    var listaStore = [StoreModel]()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        self.title = "Elenco Partner"
        
        if((categorySelected) != nil && categorySelected?.id != "0"){
            //posso chiamare il WS estraendo tutti i negozi
            //per categoria
            getStoreByCategory(category : self.categorySelected!);
            storeTableView.reloadData()
        }else{
            getStore();
        }
        storeTableView.delegate = self
        storeTableView.dataSource = self
        
    }

    // MARK: - Table view data source

    override func numberOfSections(in tableView: UITableView) -> Int {
        // #warning Incomplete implementation, return the number of sections
        return listaStore.count
    }

    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        // #warning Incomplete implementation, return the number of rows
        return listaStore.count
    }
    
    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = storeTableView.dequeueReusableCell(withIdentifier:"customCell") as! StoreTableViewCell
        let storeModel = listaStore[indexPath.row]
        cell.storeAddress.text = storeModel.address
        cell.storePhone.text = storeModel.phoneNumber
        cell.storeDescription.text = storeModel.description
        if(storeModel.imageUrl != ""){
            print(storeModel.imageUrl)
            let imageUrl:NSURL = NSURL(string: storeModel.imageUrl!)!
            print(storeModel.imageUrl)
            DispatchQueue.global(qos: .userInitiated).async {
                let imageData:NSData = NSData(contentsOf: imageUrl as URL)!
                DispatchQueue.main.async {
                    let image = UIImage(data: imageData as Data)
                    cell.storeImage.image = image
                    cell.storeImage.contentMode = .scaleToFill
                }
            }
        }
       // cell.storeImage.layer.cornerRadius = cell.storeImage.frame.height / 2
        return cell
    }
    
    
    
    
    
    
    
    func getStoreByCategory(category : CategoryModel){
        var params = [
            "cat_id" : category.id
        ]
        let postUrl = APIRequest(endPoint: "get_store_by_category")
        postUrl.sendRequest(parameters: params as! [String : String]) {
            responseObject, error in
            guard let responseObject = responseObject, error == nil else {
                print(error ?? "Unknown error")
                return
            }
            do{
                let messageData = try JSONDecoder().decode(ResponseStoreByCategoryModel.self, from: responseObject)
                var array = messageData.result
                for store in array {
                    var imageUrl = ""
                    if(store.image.count > 0){
                        imageUrl = store.image[0].image
                    }
                    let s = StoreModel(id: "",
                                           description: store.firstName,
                                           imageUrl: imageUrl,
                                           address: store.address,
                                           phoneNumber: store.phone)
                    self.listaStore.append(s)
                }
                 self.storeTableView.reloadData()
            }catch{
                print("errore durante la decodifica dei dati")
            }
        }
    }
    
    func getStore(){
        var params = [
            "" : ""
        ]
        let postUrl = APIRequest(endPoint: "get_store")
        postUrl.sendRequest(parameters: params as! [String : String]) {
            responseObject, error in
            let user = CategoryModel(id: "0",
            description: "Tutti",
            imageUrl: "")
            //self.listaCategorie.append(user)
            guard let responseObject = responseObject, error == nil else {
                print(error ?? "Unknown error")
                return
            }
            do{
                let messageData = try JSONDecoder().decode(ResponseStoreModel.self, from: responseObject)
                var array = messageData.result
                for store in array {
                    var imageUrl = ""
                    if(store.image.count > 0){
                        imageUrl = store.image[0].image
                    }
                    let s = StoreModel(id: "",
                                           description: store.firstName,
                                           imageUrl: imageUrl,
                                           address: store.address,
                                           phoneNumber: store.phone)
                    self.listaStore.append(s)
                }
                self.storeTableView.reloadData()
            }catch{
                print("errore durante la decodifica dei dati")
            }
        }
    }
}

Method getStore, getStoreByCategory, return 9 items, but the method

numberOfSection and the method to populate customCell, are called 3 times. So i have a table with 27 items instead of 9 items.

Answer 1

Looks like you want only 1 section with 9 rows in it. If that's the case, you can return 1 from numberOfSections implementation.

override func numberOfSections(in tableView: UITableView) -> Int {
    return 1
}

The other thing I noticed is - you have a UITableViewController and an @IBOutlet var storeTableView: UITableView! as well. You don't need the outlet, You can use self.tableView for the same.