How to convert ASCII value to a character in Objective-C?

Question

I was wondering if anyone has the following php function equivalents in Objective-C for iPhone development:

ord() # returns the ASCII value of the first character of a string.
chr() # returns a character from the specified ASCII value.

Many thanks!

What happens if the string contains non ASCII characters? – mmmmmm May 14 '10 at 08:53 — mmmmmm, May 14 '10 at 08:53

score 119 · Accepted Answer · answered May 14 '10 at 09:06

This is how you can work with ASCII values and NSString. Note that since NSString is working with unichars, there could be unexpected results for a non ASCII string.

// NSString to ASCII
NSString *string = @"A";
int asciiCode = [string characterAtIndex:0]; // 65

// ASCII to NSString
int asciiCode = 65;
NSString *string = [NSString stringWithFormat:@"%c", asciiCode]; // A

luvieere · Answer 2 · 2010-05-14T08:29:27.373

12

//char to int ASCII-code
char c = 'a';
int ascii_code = (int)c;

//int to char
int i = 65; // A
c = (char)i;

edited May 14 '10 at 08:29

answered May 14 '10 at 08:23

luvieere

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char in c is a "smaller" int so you don't need to cast char to int – Kimi May 14 '10 at 08:32
Thanks luvieere for the answer! Much appreciated. – topace May 14 '10 at 08:56
Thanks, its worked for even negative value e.g if int i = 223, then you get output of char c is -33 – Hardik Darji Mar 20 '14 at 12:00

How to convert ASCII value to a character in Objective-C?

2 Answers2

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