进度条的创建，水平方向，垂直方向，动作，进度设定：

Sprite* bg = Sprite::create("bg.png");
//创建一个进程条;
ProgressTimer* loadProgress = ProgressTimer::create(Sprite::create("tiao.png"));
loadProgress->setAnchorPoint(Vec2(0.5,0.5)); 
loadProgress->setBarChangeRate(Point(0,1));//设置进度的纵方向; 
loadProgress->setType(ProgressTimer::Type::BAR);//设置进程条的类型; 
loadProgress->setMidpoint(Point(0.5,0));//设置进度的水平方向;
loadProgress->setPosition(Vec2(100.f,100.f));
bg->addChild(loadProgress);
//设定进度;
loadProgress->setPercentage(50.f);
//设定动作;
loadProgress->runAction(ProgressTo::create(2,50));