friends!, I am new to Swift. I need to make multiple API requests in one of my view controllers. If I put all the code in ViewController it will be messy. So I am trying to develop this simple architecture to separate the concepts but I'm not sure whether it's the best approach to handle this situation.
/*-----------------------------------------------------*/
/* RestClient.swift */
/*-----------------------------------------------------*/
protocol RestClientDelegate {
func dataDidLoad(json:String)
}
class RestClient {
var delegate:RestClientDelegate
//Handles all the network codes and exceptions
func makeGetRequest(url){
//send a get request to the server
//on error - handle erros
//on success - pass Json response to HttpUser class
delegate.dataDidLoad(jsonOutput)
}
}
/*-----------------------------------------------------*/
/* HttpUser.swift */
/*-----------------------------------------------------*/
protocol UserDelegate(){
func usersDidLoad(usersArray:[User])//User object array
}
class HttpUser, RestClientDelegate {
var delegate:UserDelegate
func getUsers(){
//Use rest client to make an api call
var client = RestClient()
client.delegate = self
client.makeGetRequest("www.example.com/users")
}
//Once RestClient get the json string output, it will pass to
//this function
func dataDidLoad(json:String){
//parse json - Handles json exceptions
//populate user objects in an array
//pass user array to the ViewController
delegate.usersDidLoad(usersArray:[User])
}
}
/*-----------------------------------------------------*/
/* UserViewController.swift */
/*-----------------------------------------------------*/
class UserViewController:UIViewController, UserDelegate {
override viewDidLoad(){
super.viewDidLoad()
//Ask http user class to retrieve users
var httpUser = HttpUser()
httpUser.delegate = self
httpUser.getUsers()
}
//Callback function to get users array
func usersDidLoad(usersArray:[User]) {
//now you have users object array
//populate a table view
}
}
- RestClient.swift - Make the API request and pass a json output. This class contains all the code related to network GET/POST requests. I can modify this class in the future without affecting other classes.
- HttpUser.swift - Get json output make an Users Array and pass it. This class does not care about network requests. It will just handle the JSON response and parse it into an object array. I will be having multiple of these. (ex: HttpBlogs, HttpComments)
- UserViewController.swift - Get Users Array and populate a table view. This will handle only sections related to the UI.
Can you tell me is this approach is good to follow? Is there a much better way to achieve this?
Thanks a lot everyone!
-Please note: I don't want to use 3rd party libraries like Alamofire in this case.
