在结构中创建一个变量并在同一个结构中访问该变量

Question

I'm trying to add a custom font to a swift project and have a question for Swift's struct. Since I'm gonna make custom fonts with different sizes and I need to use string ("My custom font") multiple times, I want to make a variable for the strings but get the error.

struct Fonts {

    let myFont = "My custom font"
    let myFontBold = "My custom font bold"

    static let customFontNormal = UIFont(name: self.myFont, size: 16.0)
    static let customFontBold = UIFont(name: self.myFontBold, size: 16.0)
}

and I get this error message

Cannot use instance member 'myFont' within property initializer; property initializers run before 'self' is available.

I want to call the font like Fonts.customFontNormal or something similar, but is there a way to make a string variable and enable to access the value from a variable in the same struct?

Answer 1

Thanks to Jessy, I extend UIFont and add a new struct for the sting.

struct Fonts {

    static let myFont = "myFont"
    static let myFontBold = "myFontBold"
}


extension UIFont {

    static func myFontNormal() -> UIFont {
        return UIFont(name: Fonts.myFont, size: 16)!
    }

    static func myFontBoldNormal() -> UIFont {
        return UIFont(name: Fonts.myFontBold, size: 16)!
    }
}

Thanks a lot!