ios Md5加密

首先倒入库#import <CommonCrypto/CommonDigest.h>

//md5 16位加密 （小写）

-(NSString *)md5:(NSString *)str

{

const char *cStr = [str UTF8String];

unsigned char result[16];

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

NSMutableString *hash = [NSMutableString string];

for (int i = 0; i < 16; i++)

{

[hash appendFormat:@"%02X", result[i]];

}

return [hash lowercaseString];

}