iOS Tutorial => DoggyListViewController.swift

Example

import UIKit

class DoggyListViewController: UIViewController, UITableViewDataSource {

    @IBOutlet weak var emptyView: UIView?
    @IBOutlet weak var tableView: UITableView?
    @IBOutlet weak var spinner:   UIActivityIndicatorView?

    fileprivate let dogPresenter = DoggyPresenter(dogService: DoggyService())
    fileprivate var dogsToDisplay = [DoggyViewData]()

    override func viewDidLoad() {
        super.viewDidLoad()
    
        tableView?.dataSource = self
        spinner?.hidesWhenStopped = true
        dogPresenter.attachView(true, view: self)
        dogPresenter.getDogs()
    }

    // MARK: DataSource
    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return dogsToDisplay.count
    }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = UITableViewCell(style: .subtitle, reuseIdentifier: "Cell")
        let userViewData = dogsToDisplay[indexPath.row]
        cell.textLabel?.text = userViewData.name
        cell.detailTextLabel?.text = userViewData.age
        return cell
    }
}

extension DoggyListViewController: DoggyView {

    func startLoading() {
        spinner?.startAnimating()
    }

    func finishLoading() {
        spinner?.stopAnimating()
    }

    func setDoggies(_ doggies: [DoggyViewData]) {
        dogsToDisplay = doggies
        tableView?.isHidden = false
        emptyView?.isHidden = true;
        tableView?.reloadData()
    }

    func setEmpty() {
        tableView?.isHidden = true
        emptyView?.isHidden = false;
    }
}

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iOS MVP Architecture DoggyListViewController.swift

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