custom swift classes for UITableView, UITableViewCell, fetching API data in single file.

BeerListTableViewController.swift

//
//  DrinkListTableViewController.swift
//  DrinkupClient
//
//  Created by Austin Griffith on 4/9/19.
//  Copyright © 2019 Austin Griffith. All rights reserved.
//
import Foundation
import UIKit
import Alamofire

struct Drink {
    let id: String
    let name: String
    let description: String
    let amount: Float
    let image: UIImage
    
    init(data: [String: Any]) {
        self.id = data["id"] as! String
        self.name = data["name"] as! String
        //self.amount = data["amount"] as! Float
        self.amount = ((data["amount"] as? NSNumber)?.floatValue)!
        self.description = data["description"] as! String
        self.image = data["image"] as! UIImage
    }
}

class DrinkTableViewCell: UITableViewCell {
    @IBOutlet weak var cellName: UILabel!
    @IBOutlet weak var cellAmount: UILabel!
    @IBOutlet weak var cellDescription: UILabel!
    @IBOutlet weak var cellImage: UIImageView!
    
    override init(style: UITableViewCell.CellStyle, reuseIdentifier: String!) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
}

class BeerListTableViewController: UITableViewController {

    var drinks: [Drink] = []
    
    override func viewDidLoad() {
        super.viewDidLoad()
        navigationItem.title = "Beer Selection"
        tableView.dataSource = self
        tableView.delegate = self
        //tableView.register(DrinkTableViewCell.self, forCellReuseIdentifier: "cell")
        
        tableView.register(DrinkTableViewCell.self as AnyClass, forCellReuseIdentifier: "cell")

        //tableView.register(UINib(nibName: "DrinkTableViewCell", bundle: Bundle.main), forCellReuseIdentifier: "cell")
        
        //tableView.estimatedRowHeight = 134
        //tableView.rowHeight = UITableView.automaticDimension
        
        fetchInventory { drinks in
            guard drinks != nil else { return }
            self.drinks = drinks!
            //print("Data from API call: ", self.drinks)
            //self.tableView.reloadData()
//            DispatchQueue.main.async { [weak self] in
//                self?.tableView.reloadData()
//            }
        }
    }
    
    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)
        DispatchQueue.main.async { [weak self] in
            self?.tableView.reloadData()
        }
    }

    @IBAction func currentOrderButtonPressed(_ sender: Any) {
        performSegue(withIdentifier: "orders", sender: nil)
    }
    
    @IBAction func homeButtonPressed(_ sender: Any) {
        //THIS METHOD WORKS BUT IT IS CREATING A NEW INSTANCE OF THE HOMECONTROLLER SO THE TABBAR GOES AWAY 
//        let homeController = HomeController()
//        let homeNavigationController = UINavigationController(rootViewController: homeController)
//        self.present(homeNavigationController, animated: true, completion: nil)
        
        let storyboard = UIStoryboard(name: "Main" , bundle: nil)
        let homeController = storyboard.instantiateViewController(withIdentifier: "homeScreen")
        let homeNavigationController = UINavigationController(rootViewController: homeController)
        self.present(homeNavigationController, animated: true, completion: nil)
    }
    
    private func fetchInventory(completion: @escaping ([Drink]?) -> Void) {
Alamofire.request("http://127.0.0.1:4000/inventory", method: .get)
        .validate()
        .responseJSON { response in
            guard response.result.isSuccess else { return completion(nil) }
            guard let rawInventory = response.result.value as? [[String: Any]?] else { return completion(nil) }
            let inventory = rawInventory.compactMap { pizzaDict -> Drink? in
                var data = pizzaDict!
                data["image"] = UIImage(named: pizzaDict!["image"] as! String)
                //print("Printing each item: ", Drink(data: data))
                //printing all inventory successful
                return Drink(data: data)
            }
            completion(inventory)
    }
}
    
    // MARK: - Table view data source

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

    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        print("ROWS: ", drinks.count)
        return drinks.count
    }

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        
        //let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! DrinkTableViewCell
        let cell = UITableViewCell(style: UITableViewCell.CellStyle.subtitle, reuseIdentifier: "cell")
        //let cell:DrinkTableViewCell = self.tableView.dequeueReusableCell(withIdentifier: "cell") as! DrinkTableViewCell
        
//        cell.cellName?.text = drinks[indexPath.row].name
//        cell.cellAmount?.text = String(drinks[indexPath.row].amount)
//        cell.cellDescription?.text = drinks[indexPath.row].description
//        cell.cellImage?.image = drinks[indexPath.row].image

        cell.imageView?.image = drinks[indexPath.row].image
        cell.textLabel?.text = drinks[indexPath.row].name
        cell.detailTextLabel?.text = drinks[indexPath.row].description

        return cell
    }
 
     override func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
     return 100.0
     }
    
    override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        performSegue(withIdentifier: "pizzaSegue", sender: self.drinks[indexPath.row] as Drink)
    }
    
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        if segue.identifier == "pizzaSegue" {
            guard let vc = segue.destination as? PizzaViewController else { return }
            vc.drink = sender as? Drink
        }
    }
    
    
    
}