Error: Value of optional type 'UIViewController?' not unwrapped; did you mean to use '!' or '?'?

[LukasGram]

One of my Storyboards uses an UIViewController without any custom class. After the Storyboard.swift is generated I get the error in the following function:

static func instantiateInitialViewController() -> UIViewController {
   return self.storyboard.instantiateInitialViewController()
}

I'm using the Swift 2.0 version of Natalie.

[krzyzanowskim]

ah, it changes between SDK versions, and differ in iOS and Mac. Need to double check this one.

[krzyzanowskim]

how come hm.... it should be something like this, with as!

        static func instantiateInitialViewController() -> UINavigationController {
            return self.storyboard.instantiateInitialViewController() as! UINavigationController
        }

[LukasGram]

In one of my Storyboards the initial view controller is an UIViewController.
But self.storyboard.instantiateInitialViewController() as! UIViewController would not make sense since instantiateInitialViewController() returns UIViewController?
So it needs to look like this: self.storyboard.instantiateInitialViewController()!

Already created a pull request (#71) which should fix this.