How to convert a unichar value to an NSString in Objective-C?

unichar greekAlpha = 0x0391;NSString* s = [NSString stringWithCharacters:&greekAlpha length:1];

And now you can incorporate that NSString into another in any way you like. Do note, however, that it is now legal to type a Greek alpha directly into an NSString literal.

Since 0xce91 is in the UTF-8 format and %C expects it to be in UTF-16 a simple solution like the one above won't work. For stringWithFormat:@"%C" to work you need to input 0x391 which is the UTF-16 unicode.

In order to create a string from the UTF-8 encoded unichar you need to first split the unicode into it's octets and then use initWithBytes:length:encoding.

unichar utf8char = 0xce91; char chars[2];int len = 1;if (utf8char > 127) {    chars[0] = (utf8char >> 8) & (1 << 8) - 1;    chars[1] = utf8char & (1 << 8) - 1;     len = 2;} else {    chars[0] = utf8char;}NSString *string = [[NSString alloc] initWithBytes:chars                                            length:len                                           encoding:NSUTF8StringEncoding];

The above answer is great but doesn't account for UTF-8 characters longer than 16 bits, e.g. the ellipsis symbol - 0xE2,0x80,0xA6. Here's a tweak to the code:

if (utf8char > 65535) {   chars[0] = (utf8char >> 16) & 255;   chars[1] = (utf8char >> 8) & 255;   chars[2] = utf8char & 255;    chars[3] = 0x00;} else if (utf8char > 127) {    chars[0] = (utf8char >> 8) & 255;    chars[1] = utf8char & 255;     chars[2] = 0x00;} else {    chars[0] = utf8char;    chars[1] = 0x00;}NSString *string = [[[NSString alloc] initWithUTF8String:chars] autorelease];

Note the different string initialisation method which doesn't require a length parameter.