DispatchGroup-enter-leave-notify.swift

import UIKit

class SplashViewController: UIViewController {
    var launchDataDispatchGroup: DispatchGroup = DispatchGroup()
    override func viewDidLoad() {
        super.viewDidLoad()
        
        DispatchQueue.global().async { [weak self] in
            self?.getAppLaunchData()
        }
    }
    
    private func getAppLaunchData() {
        launchDataDispatchGroup.enter()
        NetworkManager.shared.getData(for: .appConfig) { response in
            launchDataDispatchGroup.leave()
            // whatever you want to do with the response
        }
        launchDataDispatchGroup.enter()
        NetworkManager.shared.getData(for: .user) { response in
            launchDataDispatchGroup.leave()
            // whatever you want to do with the response
        }
        
        launchDataDispatchGroup.notify(queue: .main) { [weak self] in
            // move to the homescreen since all the API responses are received
        }
    }
}