COCOS2D-X之圆形进度条的一个简单Demo

CCSprite* pSprite = CCSprite::create("A.png");//暂且说是蓝色背景吧  
CCSize szWin = CCDirector::sharedDirector()->getVisibleSize();  
pSprite->setPosition(CCPointMake(szWin.width/2,szWin.height/2));  
this->addChild(pSprite);  
CCProgressTimer *pProgressTimer = CCProgressTimer::create(CCSprite::create("B.png")); //红色圆形进度条   
pProgressTimer->setPosition(CCPointMake(szWin.width/2,szWin.height/2));  
pProgressTimer->setPercentage(0);//显示原形的百分比  
this->addChild(pProgressTimer,0,100);    
this->schedule(schedule_selector(HelloWorld::UpdateProgress));//更加实际情况来更新进度.这里用定时器以便演示  

void HelloWorld::UpdateProgress(float Dt)  
{  
 CCProgressTimer * pProgressTimer = (CCProgressTimer *)this->getChildByTag(100);    
 pProgressTimer->setPercentage(pProgressTimer->getPercentage() + Dt * 10);//更新进度  
 if (pProgressTimer->getPercentage()==100)   
 {  
  this->unschedule(schedule_selector(HelloWorld::UpdateProgress));//取消定时器  
 }  
}