Hi, it is me again.

I have some questions here.

1. I have seen tons of   

Director::getInstance();

          usages in the code. I looked up for the definition.

• Director: Class that creates and handles the main Window and manages how and when to execute the Scenes.
• getInstance: Returns a shared instance of the director.

It seems like Director::getInstance is so powerful that it can control the entire scene. 

Like:

Director::getInstance()->getEventDispatcher()->addEventListenerWithSceneGraphPriority(touchListener, this);

p.s. this is in GameScene.cpp of Flappy Bird project.

I feel I get confused what it is actually doing. And also the listener is what drives me nuts. 

How should I establish the concept about all these?  I want to fully understand them so that I would not get stuck while I am designing my own game.

     2.  I am studying another game project now, which is called PopStar. It is about a 10x10, 5 different color bricks and we doubleclick to eliminate the same color bricks nearby.

         You could see the actual demostration here: https://www.youtube.com/watch?v=gpOn51O9Azo

         I have already had some thoughts about its algorithm, but I do not know how to implement them on Cocos2d-x, like using an array to store Sprite and I can simply adjust the index value to determine the upper/lower/left/right brick has the same color as the chosen one. Would you mind showing me a direction that the better way to implement this project?

     3.  Is it right that defining an object with auto and we do not have to care about whether it is a value or a pointer? Because I have seen someone else’s code and he wrote like this:

CCSprite* sprite = CCSprite::create("sprite.png");

And I create my sprite using:

auto sprite = Sprite::create("sprite.png");

And both they call setPosition with:

sprite->setPosition(Point(visibleSize.width / 2 + origin.x, visibleSize.height / 2 + origin.y));

Is it correct that I declare auto sprite to be a pointer even if I do not use * ?

    4.  When do we have to use class destructor? I sometimes saw it but not really understand what it is for.

Sorry that I have too many questions. I really want to be a good cocos2d-x programmer. Hope you can help me out.

Huge appreciation!