Hiding status bar in iOS8 using Swift

I recently started learning swift, while learning I started to create simple game. I wanted to make my game full screen, but I was unable to hide top status bar from Interface builder. No matter what I change that status bar was always visible.

Buf I found following code snippet, if you add this code in your View Controller file, you can easily hide status bar.

override func prefersStatusBarHidden() -> Bool {
    return true;
}

Following how my ViewController file looks after adding this code.

class ViewController: UIViewController {
        
    override func viewDidLoad() {
        super.viewDidLoad()
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }
    
    override func prefersStatusBarHidden() -> Bool {
        return true;
    }
}

That's it. Hope this will be hopeful.