- (NSString *)MD5
{
const char *cStr = [self UTF8String];
unsigned char result[16];
CC_MD5(cStr, strlen(cStr), result);
return [NSString stringWithFormat:
@"%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X",
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]];
}
原文：http://blog.csdn.net/zh_2608/article/details/41805979