Looping through NSString Unicode characters - http://www.objc.io/issue-9/unicode.html

nsstring-unicode-loop.m

NSString *s = @"The weather on \U0001F30D is \U0001F31E today.";
    // The weather on 🌍 is 🌞 today.
NSRange fullRange = NSMakeRange(0, [s length]);
[s enumerateSubstringsInRange:fullRange
                      options:NSStringEnumerationByComposedCharacterSequences 
                   usingBlock:^(NSString *substring, NSRange substringRange, 
                                NSRange enclosingRange, BOOL *stop) 
{
    NSLog(@"%@ %@", substring, NSStringFromRange(substringRange));
}];