将Sprite转换为Image。

////获取精灵的CCImageImage*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();}//