一，代码。
- (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. NSLog(@"---%@----",[self md5:@"123456"]); } //将订单号使用md5加密 -(NSString *) md5:(NSString *)str { const char *cStr = [str UTF8String]; unsigned char result[16]= "0123456789abcdef"; CC_MD5(cStr, (CC_LONG)strlen(cStr), result); // This is the md5 call return [NSString stringWithFormat: @"XXXXXXXXXXXXXXXX", result[0], result[1], result[2], result[3], result[4], result[5], result[6], result[7], result[8], result[9], result[10], result[11], result[12], result[13], result[14], result[15] ]; }
二，输出。
2015-10-23 10:51:21.590 使用MD5加密[3983:93105] ---E10ADC3949BA59ABBE56E057F20F883E----