MD5加密字符串,返回加密后的字符串

MD5加密字符串,返回加密后的字符串

- (NSString *)getMd5WithString:(NSString *)string{    const char *cStr = [string UTF8String];    unsigned char digest[CC_MD5_DIGEST_LENGTH];    CC_MD5( cStr, (int)string.length, digest );    NSMutableString *result = [NSMutableString stringWithCapacity:CC_MD5_DIGEST_LENGTH * 2];    for(int i = 0; i < CC_MD5_DIGEST_LENGTH; i++)        [result appendFormat:@"%02x", digest[i]];    return result;}