How to convert a NSString with Umlaut to Char / Glyph

Question

Hi, I am trying to write heaps of text to the screen using a custom font. It all works well but I am having a bit of trouble getting it to work with strings containing a Umlaut. I tried all sorts of encodings with no success. This is what I did... I think it goes wrong when getting the C-Version of a string. the cars-array doesnt contain that character then, hence it wont get added to the glyphs array and finally NOT drawn... :-(

Any suggestions? Thanks Tom

 CGGlyph* Glyphs = malloc(sizeof(CGGlyph) * [textToDraw length]);
 char* Chars = malloc(sizeof(char) * ([textToDraw length] + 1));
 [textToDraw getCString:Chars maxLength: ([textToDraw length] + 1) encoding: NSNEXTSTEPStringEncoding];

 for(int CurrentChar = 0; CurrentChar < [textToDraw length]; ++CurrentChar)
 {
  Glyphs[CurrentChar] = Chars[CurrentChar]- 29;
 }
 CGContextShowGlyphs(UIGraphicsGetCurrentContext(), Glyphs, [textToDraw length])

Answer 1

If I understand correctly you are trying to store non-asci characters in a file that is being compiled. You can't do that. You have to escape the string like so:

@"The Greek letter Beta looks like this: \u03b2"

See How do I escape a Unicode character in my source code?

Answer 2

NSNextStepStringEncoding? Does that have an encodings for umlaut characters? If not, your conversion will fail (or at least skip the characters it can't convert).