Check if string is palindrome in objective c

Question

I\'m trying to check if a string is palindrome or not using objective c. I\'m new to programming without any experience in other programming languages so bear with me please

Answer 1

As it seems there's no answer yet that handles composed character sequences correctly I'm adding my two cents:

NSString *testString = @"\u00E0 a\u0300"; // "à à"

NSMutableArray *logicalCharacters = [NSMutableArray array];
[testString enumerateSubstringsInRange:(NSRange){0, [testString length]}
                               options:NSStringEnumerationByComposedCharacterSequences
                            usingBlock:^(NSString *substring, NSRange substringRange, NSRange enclosingRange, BOOL *stop)
{
    [logicalCharacters addObject:substring];
}];

NSUInteger count = [logicalCharacters count];
BOOL isPalindrome = YES;
for (NSUInteger idx = 0; idx < count / 2; ++idx) {
    NSString *a = logicalCharacters[idx];
    NSString *b = logicalCharacters[count - idx - 1];
    if ([a localizedCaseInsensitiveCompare:b] != NSOrderedSame) {
        isPalindrome = NO;
        break;
    }
}

NSLog(@"isPalindrome: %d", isPalindrome);

This splits the string into an array of logical characters (elements of a string that a normal user would call a "character").