cocos2dx 保存scrollview里的全部内容到一张图里

map<int, string> levelMaps;
    set<int> saved;//记录存好的文件
    for(int i=0; i<189; i++){
        //检查188个关卡,有哪些已经配置好了
        string levelName = "guanka_";
        levelName.append(Value(i).asString());
        levelMaps.insert(map<int, string>::value_type(i, levelName));
        levelName.append(".tpl");
        if(FileUtils::getInstance()->isFileExist(levelName)){
            //文件存在就记录
            saved.insert(i);
        }
    }
    auto ws = Director::getInstance()->getWinSize();
    auto lstw = ui::ListView::create();
    lstw->setName("showLevel");
    lstw->setBackGroundColorType(ui::ScrollView::BackGroundColorType::SOLID);
    lstw->setAnchorPoint(Vec2::ANCHOR_BOTTOM_LEFT);
    lstw->setSize(Size(110, ws.height));
    lstw->setDirection(ui::ScrollView::Direction::VERTICAL);
    lstw->setBounceEnabled(true);
    lstw->setPosition(Vec2(0, 0));
    pNode->addChild(lstw);
    for(std::pair<int, string> mapL : levelMaps){
        auto lay = Layout::create();
        lay->setBackGroundColorType(ScrollView::BackGroundColorType::SOLID);
        lay->setBackGroundColor(Color3B::GRAY);
        lay->setTouchEnabled(true);
        lay->setUserData((void*)mapL.first);
        lay->setContentSize(Size(110,42));//117 114
        Label *label = Label::createWithSystemFont(mapL.second, "", 18);
        label->setAnchorPoint(Vec2::ANCHOR_MIDDLE);
        if(saved.find(mapL.first) != saved.end()){
            //如果存在改变文字颜色
            label->setColor(Color3B::GREEN);
        }else {
            label->setColor(Color3B::BLACK);
        }
        label->setDimensions(110,30);
        label->setPosition(lay->getContentSize()/2);
        lay->addClickEventListener([=](Ref *sender){
            auto select = dynamic_cast<Layout*>(lstw->getUserObject());
            if(select == lay){
                return ;
            }
            if(select){
                select->setBackGroundColor(Color3B::GRAY);
            }
//            m_guanka.canMove = pro.m_type;
            lay->setBackGroundColor(Color3B::RED);
            lstw->setUserObject(lay);
            //设置关卡级数
            m_level = mapL.first;
            Button * levelText = dynamic_cast<Button*>(pNode->getChildByName("m_level"));
            if(levelText){
                levelText->setTitleText(Value(m_level).asString());
            }
            pNode->removeChildByName("showLevel");
            //重新读取配置信息
            readGameDataTpl();
        });
        //设置默认
        if(m_level == mapL.first){
            lay->setBackGroundColor(Color3B::RED);
            lstw->setUserObject(lay);
        }
        lay->addChild(label);
        lstw->addChild(lay);
    }
    lstw->runAction(Sequence::create(DelayTime::create(0.1), CallFunc::create([=](){
//        lstw->scrollToPercentVertical(m_level*1.0/levelMaps.size()*100.0, 0.1, true);
        log("------------------------x=%f, y=%f,heigh=%f", lstw->getInnerContainer()->getPosition().x, lstw->getInnerContainer()->getPosition().y, lstw->getInnerContainer()->getSize().height);
        int sn = lstw->getInnerContainerSize().height/960;
        auto off = lstw->getInnerContainerSize().height-960.0*sn;
//         lstw->getInnerContainer()->setPosition(Vec2(0,0));

//将listview里的全部内容保存到一张图片里      

auto render = RenderTexture::create(640,  lstw->getInnerContainerSize().height);
        render->begin();
        auto pos = lstw->getInnerContainer()->getPosition();
        for(int i=0; i<sn-1; i++){
            this->visit();
//            pos+= Vec2(0, 960);
            pos.y += 960;
            lstw->getInnerContainer()->setPosition(pos);
            log("pos [%d] y=%f", i, pos.y);
        }
        log("-----1pos [%d] y=%f", sn-2, pos.y);
        this->visit();
        pos.y += off;
        lstw->getInnerContainer()->setPosition(pos);
        this->visit();
        log("------2pos [%d] y=%f", sn-1, pos.y);
        render->end();
        render->saveToFile("sssss.png");
    }), nullptr));

cocos2dx 保存scrollview里的全部内容到一张图里

原文：http://my.oschina.net/u/219482/blog/523225