Question

For Objective-C in iOS:

If I have a string how could I read the unicode numeric value of an individual character?

For example if my string was: “∆” That unicode character is U+0394, so how could I read the string, figure out the “0394” then create a new string with say 100 added to that value, so the new string would be the character U+0494 or “ҕ”

Thanks!

Answer 1

First, there is a fallacy in your logic. ∆ + 100 != ҕ. Unicode is evaluated in base-16 (hex), so ‘∆’ is actually equal to 916 in decimal, not 394. Thus, 0x0494 - 0x0394 = 0x0100, which equals 256.

With that in mind, your code should look something like this:

unichar delta = 0x0394;
unichar weirdB = delta + 0x0100;

NSString *deltaStr = [NSString stringWithCharacters:&delta length:1];
NSString *weirdBString = [NSString stringWithCharacters:&weirdB length:1];