将表情符号编码为字符串

Question

I want to encode this emoji 😈 to string:

I have tried like this:

let data = self.comment.dataUsingEncoding(NSNonLossyASCIIStringEncoding, allowLossyConversion: true)
if let data = data {
   let emojiString = NSString(data: data, encoding: NSUTF8StringEncoding) as! String
       self.comment = emojiString
}

but it doesn't work.

I want to encode like 😈 , not \?\?

So how to do this?

Answer 1

128520 is the unicode scalar value of "😈":

let text =  "😈😀"

let encoded = text.unicodeScalars.map {
    "&#" + String($0.value) + ";"
}.joinWithSeparator("")

print(encoded) // 😈😀