How to go back to RootViewController from presentView controller?

Question

I am developing a iPhone Photos Gallery app and In my app I created one folder into gallery and that gallery folder is shown up into my app and while use click on Image its

Answer 1

When you don't have any photos left and do the popToRoot, it continues executing this lines:

alert.addAction(UIAlertAction(title: "Cancle", style: .Cancel, handler: {(alertAction)in
//Do not delete Photo

self.dismissViewControllerAnimated(true, completion: nil)
}))
self.presentViewController(alert, animated: true, completion: nil)

Try commenting them to see if the problem is there, and if it is, uncomment for solving it.