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Editorial Team
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Asked: 2026-05-28T18:34:11+00:00

I have a unicode hex value in an NSString – how do I output

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I have a unicode hex value in an NSString – how do I output the character; here’s what I have:

NSLog(@"\U0001D000");

NSMutableString *hexString = [[NSMutableString alloc] initWithString:@"0001D000"];
[hexString insertString:@"\\U" atIndex:0];
NSLog(@"%@", hexString);

The first NSLog outputs the character; the second just produces the output “\U0001D000”

I’ve tried lots of combinations and am at a loss – for example, I tried 

NSLog(@"\U%@", hexString);

But this gives a complier error, as it is looking for a string of numbers after the \U

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1 Answer

  1. Editorial Team

    If your character requires a surrogate pair (U+10000 to U+10FFFF), use CFStringGetSurrogatePairForLongCharacter to convert the Unicode code point into a UTF-16 surrogate pair, and then -initWithCharacters:length: to convert it into an NSString. For example:

    UniChar c[2];
CFStringGetSurrogatePairForLongCharacter(0x1D000, c);
NSString *s = [[NSString alloc] initWithCharacters:c length:2];

    For other characters (CFStringGetSurrogatePairForLongCharacter returns FALSE), you can skip the conversion and go straight to -initWithCharacters:length:.

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