UserDefaults wrapper to easily store object or array of object in Swift

draw.swift

import Foundation

class Draw: NSObject, NSCoding {
    
    var id: String = ""
    var name: String = ""
    var at: Date = Date()
    
    override init() {
        super.init()
    }
    
    required init?(coder aDecoder: NSCoder) {
        id = aDecoder.decodeObject(forKey: "id") as? String ?? ""
        name = aDecoder.decodeObject(forKey: "name") as? String ?? ""
        at = aDecoder.decodeObject(forKey: "at") as? Date ?? Date()
    }
    
    func encode(with aCoder: NSCoder) {
        aCoder.encode(id, forKey: "id")
        aCoder.encode(name, forKey: "name")
        aCoder.encode(at, forKey: "at")
    }
}

example.swift

// get all data
let data = LocalStorage.getAll()

// get data by id
let row = LocalStorage.get("0001")

// save data
let row = Draw()
LocalStorage.save(row)

localstorage.swift

class LocalStorage {
    
    private static var key = "data"
    
    static func getAll() -> [Draw] {
        let storage = UserDefaults.standard
        
        if let rawValue = storage.value(forKey: self.key) as? Data {
            if let data = NSKeyedUnarchiver.unarchiveObject(with: rawValue) as? [Draw] {
                return data
            }
        }
        
        return [Draw]()
    }
    
    static func get(_ id: String) -> Draw {
        let rows = getAll().filter { (draw) -> Bool in
            return draw.id == id
        }
        
        return rows.first ?? Draw()
    }
    
    static func save(_ draw: Draw) {
        var all = getAll()
        all.append(draw)
        
        let rawValue = NSKeyedArchiver.archivedData(withRootObject: all)
        let storage = UserDefaults.standard
        storage.set(rawValue, forKey: self.key)
        storage.synchronize()
    }
    
    static func saveAll(_ all: [Draw]) {
        let rawValue = NSKeyedArchiver.archivedData(withRootObject: all)
        let storage = UserDefaults.standard
        storage.set(rawValue, forKey: self.key)
        storage.synchronize()
    }
    
    static func delete(_ id: String) {
        let all = getAll().filter { (each) -> Bool in
            return each.id != id
        }
        self.saveAll(all)
    }
}