Objective-C: unichar vs. char

Question

I\'m a little confused between a unichar and a char. Can I treat unichar\'s similar to char\'s?

For example, can I do this:

-(BOOL)isNewLine:(unicha         


        

Answer 1

Yes, unichar is internally unsigned short, so you can meaningfully compare it with a char (if the latter is ASCII, but that works fine for '\n').

Answer 2

When comparing unichars, consider instead using:

if ([[NSCharacterSet newlineCharacterSet] characterIsMember:unicharCharacter])
{
    //any type of newline
}
else
{
    //etc
}

Then you will catch all types of newlines and have code you can easily modify to match different character sets (like whitespaceAndNewlineCharacterSet).

This is the big upside with unichars.

Answer 3

Be careful checking for newline that you know the format of your line endings, as Unix (and modern Mac) use \n, but Windows uses \r\n and classic Mac uses \r.