Quickly determine the screen type of the device

DeviceHelper.swift

enum DeviceScreenType {
    case fourOrLess, five, six, sixPlus
}

struct DeviceHelper {
    static var screenType: DeviceScreenType {
        let maxScreenLength = max(UIScreen.main.bounds.size.width, UIScreen.main.bounds.size.height)

        if maxScreenLength < 568.0 {
            return .fourOrLess
        } else if maxScreenLength < 667.0 {
            return .five
        } else if maxScreenLength < 736.0 {
            return .six
        } else {
            return .sixPlus
        }
    }
}