13 -- game Archive

Common functions in the game when saving game data. cocos2dx provides us with the ccuserdefault class. This class uses XML files to store data and provides several basic storage interfaces.

// Obtain the specified value based on the key. The default value bool getboolforkey (const char * pkey) returned by the overloaded version is not read; bool getboolforkey (const char * pkey, bool defaultvalue ); int getintegerforkey (const char * pkey); int getintegerforkey (const char * pkey, int defaultvalue); float getfloatforkey (const char * pkey, float defaultvalue); double getdoubleforkey (const char * pkey, double defaultvalue); STD: String getstringforkey (const char * pkey); STD :: string getstringforkey (const char * pkey, const STD: string & defaultvalue); // set the value void setboolforkey based on the key (const char * pkey, bool value ); void setintegerforkey (const char * pkey, int value); void setfloatforkey (const char * pkey, float value); void setdoubleforkey (const char * pkey, double value ); void setstringforkey (const char * pkey, const STD: string & value); // call void flush () to save it to an XML file ();

The following is a simple test code, which can be directly put in the init method of helloworldscene. cpp.

 

CCUserDefault::sharedUserDefault()->setBoolForKey("isMax",false);    CCUserDefault::sharedUserDefault()->setDoubleForKey("HP",2.0);    CCUserDefault::sharedUserDefault()->setFloatForKey("MP",3.0f);    CCUserDefault::sharedUserDefault()->setIntegerForKey("lv",2);    CCUserDefault::sharedUserDefault()->setStringForKey("name","hjs");    bool ismax = CCUserDefault::sharedUserDefault()->getBoolForKey   ("isMax" );    double hp = CCUserDefault::sharedUserDefault()->getDoubleForKey ("HP"    );    float mp = CCUserDefault::sharedUserDefault()->getFloatForKey  ("MP"    );    int lv = CCUserDefault::sharedUserDefault()->getIntegerForKey("lv"    );    std::string name = CCUserDefault::sharedUserDefault()->getStringForKey ("name"  );    if(ismax)        CCLOG("ismax true");    else        CCLOG("ismax false");    CCLOG("hp:%f",hp);    CCLOG("mp:%f",mp);    CCLOG("lv:%d",lv);    CCLOG("name:%s",name.c_str());    int tmp = CCUserDefault::sharedUserDefault()->getIntegerForKey("tmp",10);    CCLOG("tmp:%d",tmp);

During the test, we found that the flush () method can be written to the XML file in time without calling it, but remember to call it.