How to get sharedApplication in Swift on iOS?

How can I get instance of current UIApplication from View Controller in Swift?

I am getting `Use of unresolved identifier 'sharedApplication'` error with this code:

let app = sharedApplication as UIApplication

EDIT **Swift 4.x**

let app = UIApplication.shared.delegate as! AppDelegate

If you're e.g. not in a ViewController, you must:

import UIKit


Perhaps try:

let app = UIApplication.sharedApplication()

EDIT (Swift 3):

It should be noted that in Swift 3, to accomplish this, you will want to access the `shared` property instead:

let app = UIApplication.shared

You can do it by

let app = UIApplication.sharedApplication()