Setting a single style leads to undefined behavior if incorrect time of day

[ericrwolfe]

I'm getting a situation where I'm building a style switcher and caching each style as a property to load later. When passing them into the NavigationViewController.init() method, sometimes the style loads, and sometimes it displays like so:

class ListViewController: UITableViewController {

    let styleA = StyleA()
    let styleB = StyleB()
    let styleC = StyleC()

   ...
}

Loading navigation from ListViewController like so:

let viewController = NavigationViewController(for: route, styles: [self.styleA])

Each style is a subclass of DayStyle, and implements the init() and apply() methods:

class StyleBase: DayStyle {
    required init() {
        super.init()
        statusBarStyle = .lightContent
    }
    
    override func apply() {
        super.apply()
        Button.appearance().textColor = #colorLiteral(red: 0.9842069745, green: 0.9843751788, blue: 0.9841964841, alpha: 1)
    }
}

cc @frederoni

[ericrwolfe]

Looks like this is a bug related to the time of day. Given that it's now night time locally, setting styleType = .night fixed the problem.

We should not check the time of day if only a single style is passed in.

cc @frederoni @bsudekum