class HelloLayer: CCLayer
{
    public:
        HelloLayer()
        {
            setIsKeypadEnabled(true);
        }

        virtual ~HelloLayer();

        virtual void keyBackClicked();  // 重写手机返回键点击
        virtual void keyMenuClicked();  // 手机菜单键点击
}
CCLayerColor * layer = CCLayerColor::layerWithColorWidthHeight(ccc4f(红, 绿, 蓝, 透明度), 宽, 高);
layer->setPosition(ccp(0, 0));
layer->setContentSize(CCSizeMake(100, 100));
...
ccBlendFunc bf = {CC_BLEND_SRC, CC_BLEND_DST};
layer->setBlendFunc(bf);    // 与底下图层进行混合,颜色会产生变化。
CCLayerGradient * layer = CCLayerGradient::layerWithColor(ccc4f(), ccc4f(), ccp(0, 0));
layer->setIsCompressedInterpolation(true/false);    // 是否压缩插值