I have an UIViewController subclass that seems to load a Nib for its view resulting in a NSUnknownKeyException. 
There is no explicit call to init(nibName: nibNameOrNil, bundle: nibBundleOrNil) or loadNibNamed() in my code. 
And I don't get what is happening.
edit : here is the constructor I'm calling.
convenience init(overviewController:OverviewViewController) {
    self.init()
}
