Just a reusable code

Coin.swift

//
//  Coin.swift
//  Crypto Price Tracker
//
//  Created by Kennedy on 22/01/2018.
//  Copyright © 2018 Kennedy. All rights reserved.
//

import Foundation

class Coin {
    var id: String?
    var name: String?
    var symbol: String?
    var rank: String?
    var price_usd: String?
    var price_btc: String?
    var h_volume_usd: String?
    var market_cap_usd: String?
    var available_supply: String?
    var total_supply: String?
    var max_supply: String?
    var percent_change_1h: String?
    var percent_change_24h: String?
    var percent_change_7d: String?
    var last_updated: String?
    
    
            let json = JSON.init(parseJSON: "[{\"name\" : \"Bitcoin\", \"id\" : \"bitcoin\", \"price_usd\" : \"10554.2\", \"percent_change_24h\" : \"-9.42\", \"symbol\" : \"BTC\"}, {\"name\" : \"Ethereum\", \"id\" : \"ethereum\", \"price_usd\" : \"965.272\", \"percent_change_24h\" : \"-8.98\", \"symbol\" : \"ETH\"}, {\"name\" : \"Ripple\", \"id\" : \"ripple\", \"price_usd\" : \"1.1983\", \"percent_change_24h\" : \"-14.02\", \"symbol\" : \"XRP\"}, {\"name\" : \"Bitcoin Cash\", \"id\" : \"bitcoin_cash\", \"price_usd\" : \"1580.9\", \"percent_change_24h\" : \"-11.28\", \"symbol\" : \"BCH\"}, {\"name\" : \"Cardano\", \"id\" : \"cardano\", \"price_usd\" : \"0.53791\", \"percent_change_24h\" : \"-12.47\", \"symbol\" : \"ADA\"}]")
            formatTickersData(json: json)
    
            if let url = URL(string: baseImageUrl + ticker["symbol"].string!) {
                DispatchQueue.global().async {
                    let data = try? Data(contentsOf: url)
                    DispatchQueue.main.async {
                        cell.coinImageView.image = UIImage(data: data!)
                    }
                }
            }
}