Placing main view into SlideMenuController causes preferredStatusBarStyle() to be ignored

As the title states, after putting my main view into the slide menu controller, the method `preferredStatusBarStyle()` is no longer applied to any children views. I confirmed this by backing out the slide out menu code and it started working again.

Here is my `preferredStatusBarStyle` code:

``` swift
class MainNavigationController: UINavigationController {

...

override func preferredStatusBarStyle() -> UIStatusBarStyle {
return UIStatusBarStyle.LightContent
}

}
```

I'm not truly sure what could cause this, but any insight is greatly appreciated.