viperInteractor.swift

import Foundation
import Alamofire

protocol PersonsInteractorInput: class {
    func fetchPersons()
}

class PersonsInteractor: NSObject, PersonsInteractorInput {
    
    let url = "https://www.example.com"
    
    weak var output: PersonsInteractorOutput!
    
    func fetchPersons() {
        Alamofire.request(.GET, url).responseArray { (response: Response) in
            let personsArray:[Person] = response.result.value!
            self.output.personsFetched(personsArray!)
        }
    }
    
}