Basic Realm Database for iOS Example

realm_example.swift

//
//  ViewController.swift
//  HelloRealm
//
//  Created by Christopher Pedersen on 2/25/19.
//  Copyright © 2019 Christopher Pedersen. All rights reserved.
//

import UIKit
import RealmSwift

class ViewController: UIViewController {
    
    @IBOutlet weak var cookieCountLabel: UILabel!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        
        let realm = try! Realm()
        let cookies = realm.objects(Cookie.self)
        let cookieCount: Int = cookies.count
        
        if cookieCount > 0 {
            cookieCountLabel.text = "Cookies: \(cookieCount)"
        } else {
            cookieCountLabel.text = "Cookies: 0"
        }
    }
    
    @IBAction func onBakeCookiesButtonClicked(_ sender: Any) {
        let realm = try! Realm()
        
        let newCookie = Cookie()
        newCookie.type = "Chocolate Chip"
        newCookie.size = "Large"
        
        let cookies = realm.objects(Cookie.self)
        
        try! realm.write {
            realm.add(newCookie)
        }
        let cookieCount: Int = cookies.count
        
        cookieCountLabel.text = "Cookies: \(cookieCount)"
    }
}