NSString+MD5

////  NSString+MD5.h////  Created by Hunk on 13-7-9.//  Copyright (c) 2013年 Hunk. All rights reserved.//#import <Foundation/Foundation.h>@interface NSString (MD5)- (NSString *)md5;@end

////  NSString+MD5.m////  Created by Hunk on 13-7-9.//  Copyright (c) 2013年 Hunk. All rights reserved.//#import "NSString+MD5.h"#import <CommonCrypto/CommonDigest.h>@implementation NSString (MD5)- (NSString *)md5{    const char* character = [self UTF8String];        unsigned char result[CC_MD5_DIGEST_LENGTH];        CC_MD5(character, strlen(character), result);        NSMutableString *md5String = [NSMutableString stringWithCapacity:CC_MD5_DIGEST_LENGTH];        for(int i = 0; i < CC_MD5_DIGEST_LENGTH; i++)    {        [md5String appendFormat:@"%02x",result[i]];    }        return md5String;}@end