Define global variable with Alamofire + SwiftyJSON - swift3

Question

I'm using Alamofire for requests and i'm using swiftyjson for json parsing.
I need define global variables for other view controllers.
I have this code:
import UIKit
import Alamofire
import SwiftyJSON
#UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
struct Settings {
static var registration_url = String();
static var login_url = String();
}
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
Alamofire.request("http://localhost/settings.php").responseJSON { response in
if response.result.isSuccess {
let json = JSON(data: response.data!);
Settings.registration_url = json["registration_url"].stringValue;
Settings.login_url = json["login_url"].stringValue;
} else {
Settings.registration_url = "http://localhost/register.php";
Settings.login_url = "http://localhost/login.php";
}
}
print(Settings.registration_url);
print(Settings.login_url)
return true
}
}
I'm checking debug window, and print(Settings.registration_url); is looks blank
Why?
Thanks. Sorry for my poor english.

Answer 1

Your Settings structure is not global. You need to define it outside the class for it to be global:
struct Settings {
static var registration_url = String();
static var login_url = String();
}
#UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
Alamofire.request("http://localhost/settings.php").responseJSON { response in
if response.result.isSuccess {
let json = JSON(data: response.data!);
Settings.registration_url = json["registration_url"].stringValue;
Settings.login_url = json["login_url"].stringValue;
} else {
Settings.registration_url = "http://localhost/register.php";
Settings.login_url = "http://localhost/login.php";
}
}
print(Settings.registration_url);
print(Settings.login_url)
return true
}
}