issue while accessing global func in app delegate - ios

Question

I am new to swift and i created one swift file with name mySession and in that file i am storing login data like below
Store Login Data
func setLoginData (data:Data) {
let preferences = UserDefaults.standard
let Key_Login = "Login"
preferences.set(data, forKey: Key_Login)
preferences.synchronize()
}
and second func for use that stored data
Get Data
func getLoginData ()->Data {
let preferences = UserDefaults.standard
let Key_Login = "Login"
if preferences.object(forKey: Key_Login) == nil {
return data
} else {
return preferences.data(forKey: Key_Login)!
}
}
So now my question is that i want to use getLoginData func in my app delegate to check user is logged in or not so not able to under stand how to use that func in app delegate

Answer 1

You should encapsulate these methods inside a class and use an instance of that class inside AppDelegate
class MySession {
func setLogin(_ data: Data){...}
func getLoginData() -> Data {...}
}
At the call site, instantiate MySession and use your methods to do what's needed.
class AppDelegate {
//...
let sessionHandler = MySession()
sessionHandler.getLoginData()
}
Sidenote, make sure you're using proper Swift 4 naming conventions.

Answer 2

First Import the file name in AppDelegate
Import mySession
Then just call the method in your desired function.
setLoginData(data:<your Data>)
For example.If you want to use it in didFinishLaunchingWithOptions method, follow this
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
DefaultNetworkManager.appsConfigSetup()
window = UIWindow(frame: UIScreen.main.bounds)
setupApplication()
setLoginData(data: <Your Data>)
return true
}