Implicit declaration of function 'CC_MD5' is invalid in C99

//导入这个就行了
#import <CommonCrypto/CommonDigest.h>

//没有导包的时候,提示如下:
Implicit declaration of function 'CC_MD5' is invalid in C99


CC_MD5( cStr, strlen(cStr),result);


原文地址:https://www.cnblogs.com/hw140430/p/3807645.html