Swift 3 convert unicode string U+1F600

Question

so I'm trying to convert a unicode string U+1F600 coming from json into a UILabel but having a hell of a time.

Has anybody encountered this? It also seems JSON coming in as \u1f600 has the same issues.

I've tried this method with no luck: Emoji characters cannot be encoded to JSON

Thanks so much

`U+1F600` and `\u1f600` are not valid as JSON. Can you show what byte sequence you have received? — OOPer, Oct 09 '16 at 00:42
This might help: http://stackoverflow.com/a/32555223/1630618 — vacawama, Oct 09 '16 at 00:48

score 1 · Accepted Answer · answered Oct 09 '16 at 05:40

Thanks vacawama and Edmar, both helped me find the solution which was as follows:

if let unicode = definition["unicode"] as? String {
    if let int = Int(unicode.replacingOccurrences(of: "U+", with: ""), radix: 16) {
        if let scalar = UnicodeScalar(int) {
            let string = String(scalar)
            emoji.text = string
        }
    }
}

score 0 · Answer 2 · answered Oct 09 '16 at 00:58

In your JSON response, does \u1f600 comes in a string format ? If so, try this:

let transform = "Any-Hex/Java"
let input = "\\u1f600" as NSString
var output = input.mutableCopy() as NSMutableString

CFStringTransform(output, nil, transform as NSString, 1)

println("output: \(output)")

Swift 3 convert unicode string U+1F600

2 Answers2