Step 1: Install POD
pod ‘AlamofireObjectMapper’

Step 2: Make Models

import ObjectMapper

class WeatherResponse: Mappable {
    var location: String?
    var threeDayForecast: [Forecast]?
    
    required init?(map: Map){
        
    }
    
    func mapping(map: Map) {
        location <- map["location"]
        threeDayForecast <- map["three_day_forecast"]
    }
}

class Forecast: Mappable {
    var day: String?
    var temperature: Int?
    var conditions: String?
    
    required init?(map: Map){
        
    }
    
    func mapping(map: Map) {
        day <- map["day"]
        temperature <- map["temperature"]
        conditions <- map["conditions"]
    }
}

Step 3: Last Call WS through Alamofire

import Alamofire
import AlamofireObjectMapper
import ObjectMapper

let URL = "https://raw.githubusercontent.com/tristanhimmelman/AlamofireObjectMapper/d8bb95982be8a11a2308e779bb9a9707ebe42ede/sample_json"
        Alamofire.request(URL).responseObject { (response: DataResponse<WeatherResponse>) in
            let weatherResponse = response.result.value
            print(weatherResponse?.location ?? "")
            
            if let threeDayForecast = weatherResponse?.threeDayForecast {
                for forecast in threeDayForecast {
                    print(forecast.day ?? "")
                    print(forecast.temperature ?? "")
                }
            }
        }