Sou novo no domínio e na rapidez.

Quero exibir dados armazenados no domínio.

Quero exibir para cada data a seção de tableview.

Objeto Item

class Item: Object {
    @objc dynamic var amount: Int = 0
    @objc dynamic var date: Date?
    var parentCategory = LinkingObjects(fromType: Category.self, property: "items")
}

viewController

import UIKit
import RealmSwift

class HistoryViewController: UITableViewController {

    let realm = try! Realm()
    var items: Results<Item>?

    override func viewDidLoad() {
        super.viewDidLoad()
        items = realm.objects(Item.self)
    }


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

    override func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
        return "represents a day"
    }

    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return "Item entries with the corresponding date"
    }

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)
        cell.textLabel?.text = amount
        return cell
    }

}

data armazenada

Optional(Results<Item> <0x7ff9ba460610> (
[0] Item {
    amount = 900;
    date = 2018-01-27 06:00:06 +0000;
},
[1] Item {
    amount = 9000;
    date = 2018-01-27 06:20:29 +0000;
},
[2] Item {
    amount = 400;
    date = 2018-01-28 06:22:32 +0000;
},
[3] Item {
    amount = 45;
    date = 2018-01-28 01:21:27 +0000;
},
[4] Item {
    amount = 258665;
    date = 2018-01-30 02:35:45 +0000;
}

)))

Quero exibir como abaixo2018-01-27900900028/01/20184004530/01/2018258665