1、从文件中读取

auto sharedFileUtils = FileUtils::getInstance();        std::string ret;        sharedFileUtils->purgeCachedEntries();        std::vector
     
       searchPaths = sharedFileUtils->getSearchPaths();        searchPaths.insert(searchPaths.begin(), "Misc");        sharedFileUtils->setSearchPaths(searchPaths);                std::vector
      
        resolutionsOrder = sharedFileUtils->getSearchResolutionsOrder();        resolutionsOrder.insert(resolutionsOrder.begin(), "resources-ipadhd");        resolutionsOrder.insert(resolutionsOrder.begin()+1, "resources-ipad");        resolutionsOrder.insert(resolutionsOrder.begin()+2, "resources-widehd");        resolutionsOrder.insert(resolutionsOrder.begin()+3, "resources-wide");        resolutionsOrder.insert(resolutionsOrder.begin()+4, "resources-hd");        resolutionsOrder.insert(resolutionsOrder.begin()+5, "resources-iphone");                sharedFileUtils->setSearchResolutionsOrder(resolutionsOrder);                for (int i = 1; i < 7; i++) {            auto filename =StringUtils::format("test%d.txt",i);            //获取文件路径            ret = sharedFileUtils->fullPathForFilename(filename.c_str());            //获取文件里的字符串            std::string st = FileUtils::getInstance()->getStringFromFile(filename);            log("%s -> %s",filename.c_str(),st.c_str());        }
      
     

向本地写入和读取

auto sharedFileUtils = FileUtils::getInstance();        std::string ret;            sharedFileUtils->purgeCachedEntries();        std::vector
     
       searchPaths = sharedFileUtils->getSearchPaths();        std::string writablePath = sharedFileUtils->getWritablePath();        std::string fileName = writablePath + "external1.txt";        char szBuf[100] = "Hello Cocos2d-xrewrwe!";        /*向本地写入*/        FILE* fp = fopen(fileName.c_str(), "wb");        if (fp) {            size_t ret = fwrite(szBuf, 1, strlen(szBuf), fp);            CCASSERT(ret != 0, "fwrite function returned zero value");            fclose(fp);            if (ret != 0)                log("Writing file to writable path succeed.");                    }                        /**********************************/        searchPaths.insert(searchPaths.begin(), writablePath);        sharedFileUtils->setSearchPaths(searchPaths);                        //Get external.txt from writable path        std::string fullPath = sharedFileUtils->fullPathForFilename("external1.txt");        log("external file path = %s",fullPath.c_str());        /*读取文件*/        if (fullPath.length() > 0) {            fp = fopen(fullPath.c_str(), "rb");            if (fp) {                char szReadBuf[100] = {0};                size_t read = fread(szReadBuf, 1, strlen(szBuf), fp);                if (read > 0)                    log("The content of file from writable path: %s",szReadBuf);                fclose(fp);            }        }
     

推断文件是否存在

auto s = Director::getInstance()->getWinSize();        auto sharedFileUtils = FileUtils::getInstance();                Label* pTTF;        bool isExist = false;                //推断文件是否存在        isExist = sharedFileUtils->isFileExist("grossini.png");        pTTF = Label::createWithSystemFont(isExist ? "Images/grossini.png exists" : "Images/grossini.png doesn't exist", "", 20);        pTTF->setPosition(Point(s.width / 2, s.height / 2));        this->addChild(pTTF);

auto s = Director::getInstance()->getWinSize();        auto sharedFileUtils = FileUtils::getInstance();                        ValueMap dict;        dict["grossini.bmp"] = Value("grossini.png");        dict["grossini.xcf"] = Value("grossini.png");                sharedFileUtils->setFilenameLookupDictionary(dict);        auto sprite = Sprite::create("grossini.bmp");        this->addChild(sprite);                sprite->setPosition(Point(s.width / 2, s.height / 2));

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