The body methods of the MainViewController for our dynamic list

ItemsMainViewControllerBody.swift

// MARK: View Methods
override func viewDidLoad() {
    super.viewDidLoad()

    loadItems()
}

// MARK: Action Methods
@IBAction func add(_ sender: Any?) {
    guard let itemText = addTextField.text else {
        return
    }

    textFieldFinished()
    let item: Item = Item(item: itemText)
    ItemsRemote.postItem(item: item)
}

// MARK: Helper Methods
private func loadItems() {
    ItemsRemote.getAllItems { items in
        self.items = items
    }
}

private func textFieldFinished() {
    addTextField.text = nil
    addTextField.resignFirstResponder()
}