moz_SizeClass

gistfile1.swift

enum moz_sizeClass {
    case Unknown
    case XSmall
    case Small
    case Medium
    case Large
    case XLarge
    case XXLarge
    case XXXLarge

    static func sizeClassForValue(value: CGFloat) -> moz_sizeClass {
        if value >= 0 && value <= 160 {
            return .XSmall
        } else if value > 160 && value <= 320 {
            return Small
        } else if value > 320 && value <= 375 {
            return Medium
        } else if value > 375 && value <= 414 {
            return Large
        } else if value > 414 && value <= 748 {
            return XLarge
        } else if value > 748 && value <= 1024 {
            return XXLarge
        } else if value > 1024 {
            return XXXLarge
        } else {
            return .Unknown
        }
    }
}

extension UIView {
    func verticalSizeClass() -> moz_sizeClass {
        let size = systemLayoutSizeFittingSize(UILayoutFittingCompressedSize)
        return moz_sizeClass.sizeClassForValue(size.height)
    }

    func horizontalSizeClass() -> moz_sizeClass {
        let size = systemLayoutSizeFittingSize(UILayoutFittingCompressedSize)
        return moz_sizeClass.sizeClassForValue(size.width)
    }
}