cocos-2d-x中进度条（loadingBar）显示资源加载

电玩女神 2022-07-15 12:48 145阅读 0赞

为便于看客实际操作和理解，直接上例子

#include "LoadingBar.h"
    #include "HelloWorldScene.h"
    #include "GameScene.h"
    static int res_count=0;
    //  资源集合
    std::string PRELOAD_PLIST[]=
    {
        "mainscene1-hd",
        "stages_theme2-hd",
        "themescene3-hd",
        "TBottle-hd",
        "TBlueStar-hd",
        "TFireBottle-hd",
        "stages_theme5-hd",
        "themescene2-hd",
        "stages_bg",
        "Items02-hd",
        "gamemenu-hd",
        "Items01-hd",
        "gameover-hd",
        "gameover0-hd",
        "TRocket-hd"
    };
    //提示语集合
    std::string TIPS_LIST[]=
    {
        "hello",
        "true",
        "love",
        "stories",
        "never",
        "have",
        "endings",
    };
    
    
    Scene* BarBar::createScene()
    {
        auto scene=Scene::create();
        auto layer=BarBar::create();
        scene->addChild(layer);
        return scene;
    }
    
    bool BarBar::init()
    {
        if (!Layer::init())
        {
            return false;
        }
        
        // 添加背景
        auto bg = Sprite::create("mainbg1.png");
        bg->setAnchorPoint(Vec2(0,0));
        bg->setPosition(Vec2::ZERO);
        addChild(bg,-100);
        // 进度条背景
        auto barbg=Sprite::create("barbg.png");
        barbg->setPosition(VISIBLESIZE.width/2,VISIBLESIZE.height/4);
        barbg->setTag(2);
        addChild(barbg,-99);
        
        // 进度数
        auto BarLabel=Label::createWithTTF("aa", "fonts/Marker Felt.ttf", 30);
        BarLabel->setString(StringUtils::format("%d",barp));
        BarLabel->setColor(Color3B::RED);
        BarLabel->setAnchorPoint(Vec2(1, 0.5));
        BarLabel->setTag(450);
        addChild(BarLabel,100);
        BarLabel->setPosition(Vec2(505,100));
        auto BarLabel1=Label::createWithTTF("%", "fonts/Marker Felt.ttf", 30);
        BarLabel1->setColor(Color3B::RED);
        BarLabel1->setPosition(Vec2(520,100));
        addChild(BarLabel1);
        
        // 小提示
        auto tips=Label::createWithTTF(TIPS_LIST[rand()%7], "fonts/Marker Felt.ttf", 30);
        tips->setTag(9999);
        tips->setColor(Color3B::RED);
        tips->setPosition(Vec2(VISIBLESIZE.width/2, VISIBLESIZE.height/4+60));
        schedule(CC_CALLBACK_0(BarBar::changestring, this), 0.2f,"tips");
        addChild(tips);
        
        
       
        
        // 进度条
        auto bar=ui::LoadingBar::create("bar.png");
        bar->setTag(1);
        barbg->addChild(bar,99);
        bar->setAnchorPoint(Vec2(0,0.5));
        bar->setPosition(Vec2(0, barbg->getContentSize().height/2));
        bar->setDirection(cocos2d::ui::LoadingBar::Direction::LEFT);
        bar->setPercent(0);
    //    this->schedule(CC_CALLBACK_1(::BarBar::loadingBarUpdate, this), 0.1,"loadingBarUpdate");
        loadResources();
        
        return true;
    }
    void  BarBar::changestring()
    {
        auto tips=(Label*)this->getChildByTag(9999);
        tips->setString(TIPS_LIST[rand()%7]);//随机显示提示语
    }

void BarBar::loadingBarUpdate(float dt){
        auto lb=dynamic_cast<cocos2d::ui::LoadingBar*>(getChildByTag(2)->getChildByTag(1)); //获取进度条
        float percent=lb->getPercent()+1;   //更新进度
        lb->setPercent(percent);
        auto moneyLabel=(Label*)getChildByTag(2)->getChildByTag(450);
        barp+=1;
        moneyLabel->setString(StringUtils::format("%d",barp));
        if (percent>100) {
            lb->setPercent(100);
            unschedule("loadingBarUpdate");
            Director::getInstance()->replaceScene(HelloWorld::createScene());
        }
    }  //假的资源加载进度条
    
    void BarBar::loadResources(){
        //加载资源 
        auto cache=Director::getInstance()->getTextureCache();//缓存
        //  资源异步加载
        cache->addImageAsync("mainscene1-hd.png",CC_CALLBACK_1(BarBar::loadResourcesUpdate, this));
        cache->addImageAsync("stages_theme2-hd.png",CC_CALLBACK_1(BarBar::loadResourcesUpdate, this));
        cache->addImageAsync("themescene3-hd.png",CC_CALLBACK_1(BarBar::loadResourcesUpdate, this));
        cache->addImageAsync("TBottle-hd.png",CC_CALLBACK_1(BarBar::loadResourcesUpdate, this));
        cache->addImageAsync("TBlueStar-hd.png",CC_CALLBACK_1(BarBar::loadResourcesUpdate, this));
        cache->addImageAsync("TFireBottle-hd.png",CC_CALLBACK_1(BarBar::loadResourcesUpdate, this));
        cache->addImageAsync("stages_theme5-hd.png",CC_CALLBACK_1(BarBar::loadResourcesUpdate, this));
        cache->addImageAsync("themescene2-hd.png",CC_CALLBACK_1(BarBar::loadResourcesUpdate, this));
        cache->addImageAsync("stages_bg.png",CC_CALLBACK_1(BarBar::loadResourcesUpdate, this));
        cache->addImageAsync("Items02-hd.png",CC_CALLBACK_1(BarBar::loadResourcesUpdate, this));
        cache->addImageAsync("gamemenu-hd.png",CC_CALLBACK_1(BarBar::loadResourcesUpdate, this));
        cache->addImageAsync("Items01-hd.png",CC_CALLBACK_1(BarBar::loadResourcesUpdate, this));
        cache->addImageAsync("gameover-hd.png",CC_CALLBACK_1(BarBar::loadResourcesUpdate, this));
        cache->addImageAsync("gameover0-hd.png",CC_CALLBACK_1(BarBar::loadResourcesUpdate, this));
        cache->addImageAsync("TRocket-hd.png",CC_CALLBACK_1(BarBar::loadResourcesUpdate, this));
    }  //真资源加载
    
    void BarBar::loadResourcesUpdate(Texture2D*){
         SpriteFrameCache::getInstance()->addSpriteFramesWithFile(PRELOAD_PLIST[res_count]+(".plist"),PRELOAD_PLIST[res_count]+(".png"));
        // 更新进度条
        res_count++;
        float percent=100*res_count/15.0;//一共需要加载15次（因为有15个文件）
        auto lb=dynamic_cast<cocos2d::ui::LoadingBar*>(getChildByTag(2)->getChildByTag(1));
        lb->setPercent(percent);
        // 更新进度数
        auto BarLevel=(Label*)getChildByTag(450);
        barp=percent;
        BarLevel->setString(StringUtils::format("%d",barp));
        //加载完成，切换界面
        if (percent>=100) {
           Director::getInstance()->replaceScene(HelloWorld::createScene());
    //        Director::getInstance()->replaceScene(GameScene::createScene());
        }
    }  // 真检测资源更新