MediumBlogPost_FontHandling_Gist_5

FontWrapped2.swift

extension Font {    
    var instance: UIFont {        
        var instanceFont: UIFont!
        switch type {
        case .custom(let fontName):
            guard let font =  UIFont(name: fontName, size: CGFloat(size.value)) else {
                fatalError("\(fontName) font is not installed, make sure it is added in Info.plist and logged with Utility.logAllAvailableFonts()")
            }
            instanceFont = font
        case .installed(let fontName):
            guard let font =  UIFont(name: fontName.rawValue, size: CGFloat(size.value)) else {
                fatalError("\(fontName.rawValue) font is not installed, make sure it is added in Info.plist and logged with Utility.logAllAvailableFonts()")
            }
            instanceFont = font
        case .system:
            instanceFont = UIFont.systemFont(ofSize: CGFloat(size.value))
        case .systemBold:
            instanceFont = UIFont.boldSystemFont(ofSize: CGFloat(size.value))
        case .systemItatic:
            instanceFont = UIFont.italicSystemFont(ofSize: CGFloat(size.value))
        case .systemWeighted(let weight):
            instanceFont = UIFont.systemFont(ofSize: CGFloat(size.value),
                                             weight: CGFloat(weight))
        case .monoSpacedDigit(let size, let weight):
            instanceFont = UIFont.monospacedDigitSystemFont(ofSize: CGFloat(size),
                                                            weight: CGFloat(weight))
        }
        return instanceFont
    }
}