A category for NSString to reverse string.

NSString+Reverse.h

//
//  NSString+Reverse.h
//
//  Created by Shilo White on 9/1/13.
//  Copyright (c) 2013 Shilocity Productions. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface NSString (Reverse)

@property (nonatomic, readonly) NSString *reversedString;

@end

NSString+Reverse.m

//
//  NSString+Reverse.m
//
//  Created by Shilo White on 9/1/13.
//  Copyright (c) 2013 Shilocity Productions. All rights reserved.
//

#import "NSString+Reverse.h"

@implementation NSString (Reverse)

- (NSString *)reversedString
{
    NSMutableString *reversedString = [NSMutableString stringWithCapacity:self.length];
    
    [self enumerateSubstringsInRange:NSMakeRange(0,self.length)
                            options:(NSStringEnumerationReverse | NSStringEnumerationByComposedCharacterSequences)
                         usingBlock:^(NSString *substring, NSRange substringRange, NSRange enclosingRange, BOOL *stop) {
                                        [reversedString appendString:substring];
                                    }];
    return reversedString;
}

@end