Cocos2dx获取系统时间(3.3版本)

一、获取时间
struct tm *tm;
time_t timep;
#if (CC_TARGET_PLATFORM == CC_PLATFORM_WIN32)
  time(&timep);
#else
  struct timeval tv;
  gettimeofday(&tv, NULL);
  timep = tv.tv_sec;
#endif
tm = localtime(&timep);
int year = tm->tm_year + 1900;//年
int month = tm->tm_mon + 1;//月
int day = tm->tm_mday;//日

二、获取两个日期相差多少天
1、获取当前日期的天数
GetAbsDays(MyDate x)
 {
   int i;
   int month_day[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
   int year = x.year - 1;
   int days = year * 365 + year / 4 - year / 100 + year / 400;
   if (x.year % 4 == 0 && x.year % 100 != 0 || x.year % 400 == 0)
    month_day[1]++;
   for (i = 0; i < x.month - 1; i++)
     days += month_day[i];
   days += x.day - 1;
   return days;
}

2、GetAbsDays(MyDate1 )- SignDialog::GetAbsDays(MyDate2);

三、通过时间戳计算时间差
1、获取当前时间（秒）
time_t t = time(0);
2、保存时间
Data data;
data.copy((unsigned char *) &t, sizeof(t));
UserDefault::getInstance()->setDataForKey("time_1", data);
3、取时间
auto d = UserDefault::getInstance()->getDataForKey("time_1",Data());
time_t lastExitTime = *((time_t*)d.getBytes());
time_t currentTime= time(0);
time_t time=currentTime-lastExitTime;
4、换算为分钟
int k=time/60;
(参考他人  u012408019)
上述是版本为3.3

另一种写法

std::string Tools::get_date_now()

{

#if (CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID || CC_TARGET_PLATFORM == CC_PLATFORM_IOS)

    struct cc_timeval now;

    CCTime::gettimeofdayCocos2d(&now, NULL);

    struct tm *tm;

    time_t tp = now.tv_sec;

    tm = localtime(&tp);

    char date[32] = { 0 };

    sprintf(date, "%d-%02d-%02d", (int) tm->tm_year + 1900,

        (int) tm->tm_mon + 1, (int) tm->tm_mday);

    return string(date);

#endif

#if ( CC_TARGET_PLATFORM == CC_PLATFORM_WIN32 )

    struct tm *tm; 

    time_t timep; 

    time(&timep); 

    tm = localtime(&timep); 

    //int year = tm->tm_year + 1900; 

    //int month = tm->tm_mon + 1; 

    //int day = tm->tm_mday; 

    //int hour=tm->tm_hour; 

    //int minute=tm->tm_min; 

    //int second=tm->tm_sec;

    char time[64] = { 0 };

    sprintf(time, "%d-%02d-%02d %02d:%02d:%02d", (int) tm->tm_year + 1900,

        (int) tm->tm_mon + 1, (int) tm->tm_mday, (int) tm->tm_hour,

        (int) tm->tm_min, (int) tm->tm_sec);

    return string(time);

#endif

}