How to get sharedApplication in Swift on iOS?

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()

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