q

I want to set a label's text with a string that's partly bold. The words I want to make bold all begin with the same letter, say "~".

For example I could have the string, "This ~word is bold, and so is ~this"

Then the label's text would contain the string "This word is bold, and so is this" where "word" and "this" are bold.

Does anybody know if it's possible to make a function like this? I tried the following:

    func makeStringBoldForLabel(str: String) {
        var finalStr = ""
        let words = str.components(separatedBy: " ")
        for var word in words {
            if word.characters.first == "~" {
                var att = [NSFontAttributeName : boldFont]
                let realWord = word.substring(from: word.startIndex)
                finalStr = finalStr + NSMutableAttributedString(string:realWord, attributes:att)
            } else {
                finalStr = finalStr + word
            }
        }
    }

but get the error:

`Binary operator '+' cannot be applied to operands of type 'String' and 'NSMutableAttributedString'`