Question

I have a NSString that I need to examine character by character and:

 examine char
    perform calculation
 loop (until string ends)

Any thoughts on the best way to do this? Do I need to convert the NSString
to a NSArray or C string?

Answer 1

The simplest way to go about it is using NSString‘s characterAtIndex: method:

int charIndex;
for (charIndex = 0; charIndex < [myString length]; charIndex++)
{
    unichar testChar = [myString characterAtIndex:charIndex];
    //... your code here
}