Cocos2d-X 学习笔记 11 制作Loading视图

void MyScene::menuChangeCallback(CCObject* pSender)

{

         //初始化Loading界面

CCMenu *menu=(CCMenu *)getChildByTag(1);
menu->setVisible(false);
CCSize size=CCDirector::sharedDirector()->getWinSize();
labelLoading=CCLabelTTF::create("loading...","Arial",20);
labelPercent=CCLabelTTF::create("0%","Arial",20);
labelLoading->setPosition(ccp(size.width/2,size.height/2));
labelPercent->setPosition(ccp(size.width/2,size.height*0.3));
this->addChild(labelLoading);
this->addChild(labelPercent);
numberofSprites=200;
numberofLoadedSprites=0;

CCSprite *loadBg=CCSprite::create("sliderTrack.png");
loadBg->setPosition(ccp(size.width/2,size.height*0.2));
this->addChild(loadBg);

loadProgress=CCProgressTimer::create(CCSprite::create("sliderProgress.png"));
loadProgress->setBarChangeRate(ccp(1,0));
loadProgress->setType(kCCProgressTimerTypeBar);
loadProgress->setMidpoint(ccp(0,0));
loadProgress->setPosition(ccp(size.width/2,size.height*0.2));
this->addChild(loadProgress,1);
for(int i=0;i<100;i++)
{
CCTextureCache::sharedTextureCache()->addImageAsync("HelloWorld.png",this,callfuncO_selector(MyScene::loadingCallBack));
CCTextureCache::sharedTextureCache()->addImageAsync("icon.png",this,callfuncO_selector(MyScene::loadingCallBack));
}

}

//更新界面

void MyScene::loadingCallBack(CCObject* pSender)

{
numberofLoadedSprites++;
char tmp[10];
float value=((float)numberofLoadedSprites/numberofSprites)*100;
sprintf(tmp,"%d%%",(int)(value));
labelPercent->setString(tmp);
loadProgress->setPercentage(value);
if(numberofLoadedSprites==numberofSprites)
{
turnToScene();
}

}

//加载完成后需要做的事

void MyScene::turnToScene()

{
CCScene *sence=HelloWorld::scene();
CCDirector::sharedDirector()->replaceScene(sence);

}