Как мой «didFinishLaunchingWithOptions» может дождаться завершения вызова API? ⇐ IOS

[Anonymous]

Как мое приложение может дождаться завершения работы моего API вызова?
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {

GMSServices.provideAPIKey("AIzadGlsfR35k4BeHCXmRq3GDSQ-l_5gcD8")
FlicAuth.sharedInstance

//Call Api here

application.registerUserNotificationSettings(UIUserNotificationSettings(forTypes: [.Alert, .Badge, .Sound], categories: nil))
application.registerForRemoteNotifications()

if(launchOptions?[UIApplicationLaunchOptionsLocationKey] != nil){
LocationService.sharedInstance.startMonitoringLocation()
}

return FBSDKApplicationDelegate.sharedInstance().application(application, didFinishLaunchingWithOptions: launchOptions)
}


Подробнее здесь: https://stackoverflow.com/questions/366 ... api-finish