int 转string
int upLimit = 100；
#if CC_TARGET_PLATFORM != CC_PLATFORM_ANDROID
std::string upLimitStr = std::to_string(upLimit);
#else
std::ostringstream os;
os << t;
std::string upLimitStr = os.str();
#endif
原文：http://3287316.blog.51cto.com/3277316/1746055