The document describes refactoring code to follow the Model-View-Presenter (MVP) pattern. It starts with a ViewController that directly calls a TwitterManager to get tweets. It is refactored to introduce a Presenter that handles getting the tweets and notifying the ViewController to reload its table view. The Presenter retrieves tweets from the TwitterManager and calls a method on the ViewController, which conforms to a ViewControllerOutput protocol, to reload the table view.

2. 📦

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📦

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👊😤💢

28. class ViewController: UIViewController {
@IBOutlet weak var tableView: UITableView!
var tweets: [Tweet] = []
override func viewDidLoad() {
super.viewDidLoad()
TwitterManager.shared.getTweets() { [unowned self] result in
switch result {
case .success(let tweets):
self.tweets = tweets
self.tableView.reloadData()
case .failure:
() //
}
}
}
}

29. class ViewController: UIViewController {
@IBOutlet weak var tableView: UITableView!
var tweets: [Tweet] = []
override func viewDidLoad() {
super.viewDidLoad()
TwitterManager.shared.getTweet() { [unowned self] result in
switch result {
case .success(let tweets):
self.tweets = tweets
self.tableView.reloadData()
case .failure:
() //
}
}
}
}
👊😤💢

33. protocol ViewControllerOutput: class {
func reloadTableView()
}
class ViewController: UIViewController {
@IBOutlet weak var tableView: UITableView!
var presenter: SomePresenter!
override func viewDidLoad() {
super.viewDidLoad()
presenter = SomePresenter(output: self)
presenter.getTweets()
}
}
extension ViewController: ViewControllerOutput {
func reloadTableView() {
tableView.reloadData()
}
}

34. protocol ViewControllerOutput: class {
func reloadTableView()
}
class ViewController: UIViewController {
@IBOutlet weak var tableView: UITableView!
var presenter: SomePresenter!
override func viewDidLoad() {
super.viewDidLoad()
presenter = SomePresenter(output: self)
presenter.getTweets()
}
}
extension ViewController: ViewControllerOutput {
func reloadTableView() {
tableView.reloadData()
}
}

35. protocol ViewControllerOutput: class {
func reloadTableView()
}
class ViewController: UIViewController {
@IBOutlet weak var tableView: UITableView!
var presenter: SomePresenter!
override func viewDidLoad() {
super.viewDidLoad()
presenter = SomePresenter(output: self)
presenter.getTweets()
}
}
extension ViewController: ViewControllerOutput {
func reloadTableView() {
tableView.reloadData()
}
}

36. class SomePresenter {
let output: ViewControllerOutput!
var tweets: [Tweet] = []
init(output: ViewControllerOutput) {
self.output = output
}
func getTweets() {
TwitterManager.shared.getTweets() { [unowned self] result in
switch result {
case .success(let tweets):
self.tweets = tweets
self.output.reloadTableView()
case .failure:
() //
}
}
}
}

37. class ViewController: UIViewController {
@IBOutlet weak var tableView: UITableView!
var presenter: SomePresenter!
override func viewDidLoad() {
super.viewDidLoad()
presenter = SomePresenter(output: self)
presenter.getTweets()
}
}
class ViewController: UIViewController {
@IBOutlet weak var tableView: UITableView!
var tweets: [Tweet] = []
override func viewDidLoad() {
super.viewDidLoad()
getTweets() { [unowned self] result in
switch result {
case .success(let tweets):
self.tweets = tweets
self.tableView.reloadData()
case .failure:
() //
}
}
}
}

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👋

45.
💰
👭
MVP 💪

48. 🍻