Parse unicode character from server, iOS Swift

Question

I use a paid set of linear icon's from this website.

It's great! Especially in iOS I put the .ttf file in my projects bundle, load the font and use it in labels and buttons. I even wrote an article about how I do this.

My problem comes when I want to dynamically change a label based on some server value. My initial instinct was to save the unicode value as text up on the server. I simply save the the value such as ed02 and when I pull it down into my App I add it to, let's say, a label like this.

let label = UILabel(frame: CGRect(x: 0, y: 0, width: 100, height: 20))
label.font = IconUltimate().icoUltimateFont(18)
let valueFromServer = "ed02"
label.text = "\u{\(valueFromServer)}"

The problem is that the line:

label.text = "\u{\(valueFromServer)}"

is invalid. What am I doing wrong? Is there a way to inject a unicode value from the server into my UI? My solution right now is to map the unicode value from the server using a switch statement like this:

    public func unicodeMapper(rawUnicode: String) -> String {
        switch rawUnicode {
        case "ecf5":
            let thumbs_up = "\u{ecf5}"
            return thumbs_up
        default:
            return ""
        }
    }

And call it like this:

let valueFromServer = "ed02"
label.text = unicodeMapper(rawUnicode: valueFromServer)

Anyone have any suggestions so I don't have to use a switch statement and I can just inject the value from the server?

Thanks

possible duplicate of stackoverflow.com/a/54270901/2303865

Leo Dabus
– Leo Dabus

2019-10-25 17:40:08 +00:00
Commented Oct 25, 2019 at 17:40 — Leo Dabus
– Leo Dabus, Commented Oct 25, 2019 at 17:40

matt · Accepted Answer · 2019-10-25 17:31:52Z

2

Like this:

let code = "ecf5" // or whatever you got from the server
let codeint = UInt32(code, radix: 16)!
let c = UnicodeScalar(codeint)!
label.text = String(c)

answered Oct 25, 2019 at 17:31

matt

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2 Comments

matt Over a year ago

Of course in real life you should not just blithely use exclamation marks like that. :)

matt Over a year ago

Does that work for your purposes? I can't really test because you're mapping into an indeterminate area of the Unicode spectrum; I don't have glyphs at the point where you are.

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