Append unichar to NSMutableString in Swift

Question

I want to append a unichar to NSMutableString. I have

var outputString: NSMutableString = "Some string" 
let letterA: unichar = 0x1820

I saw the question Appending unichar to NSMutableString. The accepted answer (in Objective C) says:

[s appendFormat:@"%C", c];

but I can't figure out the Swift syntax. The documentation doesn't help much, either.

I even tried

outputString += letterA

but that also didn't work.

Note: I'm not trying to append a Swift String or append a Swift Character.

score 1 · Answer 1 · answered Jul 12 '15 at 04:58

1

outputString.appendFormat("%C", letterA) appends the character in Swift 1.2 running in Xcode 6.4. It appears to be the same method you've referenced in the Objective-C sample.

answered Jul 12 '15 at 04:58

Rikki Gibson

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Nofel Mahmood · Accepted Answer · 2015-07-12T06:26:47.563

1

Use the same method appendFormat in swift like this

Rewriting your code to elaborate

    var outputString: NSMutableString = "Some string"
    let letterA: unichar = 0x1820
    outputString.appendFormat("%C", letterA)

edited Jul 12 '15 at 06:26

answered Jul 12 '15 at 04:58

Nofel Mahmood

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Why couldn't I figure this out? Thank you! Both answers (this and @rikkigibson) are correct and were added at almost the same time. I will mark this one as the accepted since code is a little easier to read and test. +1 to both – Suragch Jul 12 '15 at 05:04

SwiftArchitect · Answer 3 · 2015-07-12T18:11:59.633

0

NSMutableString

The NSMutableString reference does not need to be a var

let outputString:NSMutableString = "Some string"
outputString.appendFormat("%C", 0x0041) // Letter A

Native Swift String

Solution skipping NSFoundation and unichar classes:

var outputString = "Some string"
outputString += "\u{41}" // Letter A is actually 0x0041

edited Jul 12 '15 at 18:11

answered Jul 12 '15 at 05:15

SwiftArchitect

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All of these are Swift questions and answers. Your answer is the way most people would do it in Swift, but I had a specific need to use `NSMutableString`, not `String`, because of the way `String` treats characters. See my [previous question](http://stackoverflow.com/questions/31272561/working-with-unicode-code-points-in-swift). – Suragch Jul 12 '15 at 15:27
Correct. Then solution using `NSMutableString` shall be `let`. – SwiftArchitect Jul 12 '15 at 18:12
That's interesting about `NSMutableString` not needing to be a `var`. Where is your quote from? I tried searching for it but couldn't find it. – Suragch Jul 13 '15 at 02:47

Append unichar to NSMutableString in Swift

3 Answers3