Cocos2d-x v3.2 FlappyBird Class Object code analysis (6), flappybird

Cocos2d-x v3.2 FlappyBird Class Object code analysis (6), flappybird

Today we will talk about three classes. These three classes should be relatively simple.

HelpLayer class

NumberLayer class

GetLocalScore class

The HelpLayer class is mainly composed of two graphics genie. One is the name of the game, and the other is a prompt on how to play the game:

The NumberLayer class involves the creation of custom fonts. There are many digital images in the extracted resources:

Now we want to make them like this:

This is similar to the Game image resources. It can be used directly in this way, saving a lot of things. How can we do it? Here we need to use a software, specific usage method and process, I will not introduce it here.

Http://blog.csdn.net/swejackies/article/details/8967903

I am very grateful for the detailed introduction. Another problem in the NumberLayer class is single-instance implementation. single-instance class: as the name suggests, it only has one instance. Sometimes, a function class has many instances, which makes the program very complex, the Singleton class solves this problem.

GetLocalScore class, local data access, this class is also very simple, are called, some interfaces of the cocos2d-x, so no difficulty.

The Code Analysis for these three classes is as follows:

// HelpLayer. h # pragma once # include "cocos2d. h" class HelpLayer: public cocos2d: Layer {public: HelpLayer ();~ HelpLayer (); bool init (); // callBack function void callBack (); CREATE_FUNC (HelpLayer); private: // single-touch listening cocos2d: EventListenerTouchOneByOne * listener; cocos2d :: sprite * gameName; cocos2d: Sprite * tutorial ;};

// HelpLayer. cpp # include "HelpLayer. h" USING_NS_CC; HelpLayer: HelpLayer () {} HelpLayer ::~ HelpLayer () {} bool HelpLayer: init () {if (! Layer: init () {return false;} auto origin = Director: getInstance ()-> getVisibleOrigin (); auto visibleSize = Director: getInstance () -> getVisibleSize (); // game name gameName = Sprite: createWithSpriteFrameName ("text_ready.png"); gameName-> setPosition (Point (origin. x + visibleSize. width * 0.5, origin. y + visibleSize. height * 0.8); this-> addChild (gameName); // gameplay prompt tutorial = Sprite: createWithSpriteFrameName ("tutorial.png"); tutorial-> setPosition (Point (origin. x + visibleSize. width * 0.5, origin. y + visibleSize. height * 0.4); this-> addChild (tutorial); // single-touch listening. As mentioned in the previous chapters, listener = EventListenerTouchOneByOne: create (); listener-> setSwallowTouches (false); listener-> onTouchBegan = [] (Touch * t, Event * e) {log ("touch began"); return true ;}; listener-> onTouchEnded = [=] (Touch * t, Event * e) {// The layer disappears after a click, so when the click is detected, // The listener _ eventDispatcher-> removeEventListener (listener) will be removed from the event distributor; // This gradient animation, because there are two genie executing the animation, and two such animations are required // Therefore, fade_2 cloned a fadeauto fade = FadeOut: create (0.5f ); // clone auto fade_2 = fade-> clone (); // animation execution + callback function auto callBack = CallFuncN: create (CC_CALLBACK_0 (HelpLayer: callback, this )); auto sequence = Sequence: create (fade, callback, NULL); tutorial-> runAction (sequence); gameName-> runAction (fade_2 );}; // The Last listener may not be mentioned. Every listener must be added to the event distributor, which is the following code. // The first parameter is our listener, the second parameter is to add this listener object // here our click object is the entire layer, so it is this_eventDispatcher-> addEventListenerWithSceneGraphPriority (listener, this); return true ;} // remove the void HelpLayer: callBack () {this-> removeChild (tutorial); this-> removeChild (gameName );}

// NumberLayer. h # pragma once # include "cocos2d. h" class NumberLayer: public cocos2d: Layer {public: NumberLayer ();~ NumberLayer (); bool init (); // void addScore (); // initialize the score void initScore (); // obtain the score int getScore (); // obtain the single-instance object static NumberLayer * getInstance (); private: cocos2d: Label * numberLabel; int score ;};

// NumberLayer. cpp # include "NumberLayer. h "USING_NS_CC; // unique object (the initial value must be null). Note that static NumberLayer * instance = NULL; NumberLayer: NumberLayer () {} NumberLayer ::~ NumberLayer () {}// NumberLayer * NumberLayer: getInstance () {// determines whether the object exists if (instance = NULL) {// if not, create NumberLayer * temp = new NumberLayer (); // then initialize temp-> init (); instance = temp ;} // if it already exists, return the return instance;} bool NumberLayer: init () {if (! Layer: init () {return false;} auto origin = Director: getInstance ()-> getVisibleOrigin (); auto visibleSize = Director: getInstance () -> getVisibleSize (); // initialization score = 0; // This is the Custom font that uses auto str =__ String: createWithFormat ("% d", score ); numberLabel = Label: createWithBMFont ("font1.fnt", str-> getCString (); numberLabel-> setPosition (Point (origin. x + visibleSize. width/2, origin. y + visibleSize. height * 0.85); this-> addChild (numberLabel); return true;} void NumberLayer: addScore () {score ++; auto str =__ String :: createWithFormat ("% d", score); numberLabel-> setString (str-> getCString ();} void NumberLayer: initScore () {score = 0; auto str =__ String: createWithFormat ("% d", score); numberLabel-> setString (str-> getCString ();} int NumberLayer: getScore () {return score ;}

// GetLocalScore. h # pragma once # include "cocos2d. h" class GetLocalScore {public: GetLocalScore ();~ GetLocalScore (); static GetLocalScore * getInstance (); // determine whether the local file bool isHaveLocalFile () exists; // obtain the score int getHighScore () in the local file (); // write the local file score void setHighScore (int); private :};

// GetLocalScore. cpp # include "GetLocalScore. h" USING_NS_CC; static GetLocalScore * instance = NULL; GetLocalScore: GetLocalScore () {} GetLocalScore ::~ GetLocalScore () {}// GetLocalScore * GetLocalScore: getInstance () {if (instance = NULL) {GetLocalScore * temp = new GetLocalScore (); instance = temp;} return instance;} bool GetLocalScore: isHaveLocalFile () {// get this value directly. If yes, return trueif (UserDefault: getInstance () -> getBoolForKey ("isHaveLocalFile") {return true;} else {// if it does not exist, create it and write the score. // if the written data is of the bool type, use setBoolForKey // if the data to be written is of the int type, use setIntegerForKey // and another data type. The method is similar. Here we will not introduce UserDefault: getInstance () -> setBoolForKey ("isHaveLocalFile", true); UserDefault: getInstance ()-> setIntegerForKey ("highScore", 0); UserDefault: getInstance ()-> flush (); return false ;}} // get the score int GetLocalScore: getHighScore () {if (isHaveLocalFile () {return UserDefault: getInstance () -> getIntegerForKey ("highScore") ;}else {return 0 ;}// write score void GetLocalScore: setHighScore (int n) {if (isHaveLocalFile () {UserDefault:: getInstance ()-> setIntegerForKey ("highScore", n); UserDefault: getInstance ()-> flush ();} else {UserDefault: getInstance () -> setBoolForKey ("isHaveLocalFile", true); UserDefault: getInstance ()-> setIntegerForKey ("highScore", n); UserDefault: getInstance () -> flush ();}}

This is today.

Which class is the getPositionInPixels () function in cocos2d-x? Why can't I find it?

I thought the name was wrong.

Usage:
Www.cnblogs.com/..6.html

Definition:
Code.google.com/..6&r=16



 
In the cocos2d-x, I have a class derived from CCNode, schedule in my derived class sets the timer, why not respond, solution,

This-> scheduleUpdate ();
Is this method not responding to your update (float dt?
In myNode, have you implemented onEnter ();?
If it is an empty implementation, You need to modify it by calling the onEnter () of CCNode ();
Hope to help you.