Call app delegate method from view controller

ios swift appdelegate
Memon Irshad picture Memon Irshad · Jun 8, 2015 · Viewed 33.9k times · Source

I want to know if I can call an app delegate method from another ViewController.

When the app starts, the application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool i method is called. Can I call this method a second time from another view controller?

Answer

Juan Carlos Ospina Gonzalez picture Juan Carlos Ospina Gonzalez · Jun 8, 2015

Not sure why you want to do this. You probably shouldn't, but for the purpose of answering the question here it is:

// get a reference to the app delegate
let appDelegate: AppDelegate? = UIApplication.shared.delegate as? AppDelegate

// call didFinishLaunchWithOptions ... why?
appDelegate?.application(UIApplication.shared, didFinishLaunchingWithOptions: nil)

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