将Sprite转换为Image。

//
//获取精灵的CCImage
Image*HelloWorld::createImageFromSprite(Sprite*sp)
{
	Sprite*pNewSpr=Sprite::createWithSpriteFrame(sp->getSpriteFrame());
	pNewSpr->setAnchorPoint(Vec2::ZERO);
	RenderTexture*pRender=RenderTexture::create(pNewSpr->getContentSize().width,pNewSpr->getContentSize().height,Texture2D::PixelFormat::RGBA8888);
	pRender->begin();
	pNewSpr->visit();
	pRender->end();
	returnpRender->newImage();
}
//