cocos2dx2.0升级为3.0一些常见变化纪录

川长思鸟来 2022-01-14 22:49 339阅读 0赞

[2019独角兽企业重金招聘Python工程师标准>>> ][2019_Python_] ![hot3.png][]

最近接手项目从cocos2dx 2.0 升级为 3.0 ，至于为什么要升级我也弄不清楚，只感觉3.0是要摆脱cocos2d-iphone的身影，这是要作死的态度吗，没时间去了解3.0的核心发生了神马变化，只为了从cocos2dx2.0经常适应到3.0做了一些纪录，以便查阅和方便正在从2.0到3.0的朋友。

**1.去CC**

之前2.0的CC\*\*,把CC都去掉，基本的元素都是保留的

2.0  
CCSprite CCCallFunc CCNode ..  
3.0  
Sprite CallFunc Node ..

**2.cc\*\*\*结构体改变**

2.0  
ccp(x,y)  
ccpAdd(p1,p2)  
ccpSub  
ccpMult  
ccpLength(p)  
ccpDot(p1,p2);  
ccc3()  
ccc4()  
ccWHITE  
CCPointZero  
CCSizeZero  
![12150629_qD4l.gif][]  
  
2.0  
Point(x,y)  
p1+p2;  
p1-p2  
p1\*p2  
p.getLength()  
p1.dot(p2)  
Color3B()  
Color4B()  
Color3B::WHITE  
Point::ZERO  
Size:ZERO  
![12150629_qD4l.gif][]

**3.shared\*\*\*改变**

2.0  
CCSize winSize = CCDirector::sharedDirector()->getWinSize();  
SpriteFrameCache::sharedSpriteFrameCache()  
AnimationCache::sharedAnimationCache()  
NotificationCenter::sharedNotificationCenter()  
…  
  
3.0  
Size size = Director::getInstance()->getWinSize();  
SpriteFrameCache::getInstance()  
AnimationCache::getInstance()  
NotificationCenter::getInstance()  
…

**4.POD类别**

使用const为Point，Size,Rect进行常量修饰

2.0  
void setPoint(CCPoint p)  
3.0  
void setPoint( const Point& p)

**5.点触事件**

此部分全面更新采用Event Listener

auto dispatcher = Director::getInstance()->getEventDispatcher();  
auto touchListener = EventListenerTouchOneByOne::create();  
touchListener->onTouchBegan = CC\_CALLBACK\_2(FBMainScene::onTouchBegan, this);  
touchListener->onTouchMoved = CC\_CALLBACK\_2(FBMainScene::onTouchMoved, this);  
touchListener->onTouchEnded = CC\_CALLBACK\_2(FBMainScene::onTouchEnded, this);  
dispatcher->addEventListenerWithSceneGraphPriority(touchListener, this);  
  
bool FBMainScene::onTouchBegan(Touch \*touch,Event \*pEvent)\{  
CCLOG("onTouchBegan");  
Point point = this\->convertToWorldSpace( this\->convertTouchToNodeSpace(touch));  
return true;  
\}  
  
void FBMainScene::onTouchMoved(Touch \*touch,Event \*pEvent)\{  
CCLOG("onTouchMoved");  
\}  
  
void FBMainScene::onTouchEnded(Touch \*touch,Event \*pEvent)\{  
CCLOG("onTouchEnded");  
\}  
  
//获得触点的方法也发生了改变：  
Point point = this\->convertToWorldSpace( this\->convertTouchToNodeSpace(touch));  
  
//dispatcher控制方法：  
dispatcher->addEventListener…  
dispatcher->removeEventListener(listener);  
dispatcher->removeAllListeners();

**6.CC\_CALLBACK\_\***

CC\_CALLBACK\_0 CC\_CALLBACK\_1 CC\_CALLBACK\_2 CC\_CALLBACK\_3

回调函数，分别携带不同的参数，方便

2.0  
CCMenuItemFont \*item = CCMenuItemFont::create("返回上个场景", this, menu\_selector(GameScene::backScene));  
3.0  
MenuItemFont \*item = MenuItemLabel::create("返回上个场景", CC\_CALLBACK\_1(GameScene::backScene, this));  
  
//  new callbacks based on C++11   
 \#define CC\_CALLBACK\_0(\_\_selector\_\_,\_\_target\_\_, ![12150629_qD4l.gif][]) std::bind(&\_\_selector\_\_,\_\_target\_\_, \#\#\_\_VA\_ARGS\_\_)  
\#define CC\_CALLBACK\_1(\_\_selector\_\_,\_\_target\_\_, ![12150629_qD4l.gif][]) std::bind(&\_\_selector\_\_,\_\_target\_\_, std::placeholders::\_1, \#\#\_\_VA\_ARGS\_\_)  
\#define CC\_CALLBACK\_2(\_\_selector\_\_,\_\_target\_\_, ![12150629_qD4l.gif][]) std::bind(&\_\_selector\_\_,\_\_target\_\_, std::placeholders::\_1, std::placeholders::\_2, \#\#\_\_VA\_ARGS\_\_)  
\#define CC\_CALLBACK\_3(\_\_selector\_\_,\_\_target\_\_, ![12150629_qD4l.gif][]) std::bind(&\_\_selector\_\_,\_\_target\_\_, std::placeholders::\_1, std::placeholders::\_2, std::placeholders::\_3 \#\#\_\_VA\_ARGS\_\_)

**7.使用"Function"对象**

CallFunc::create(\[&\]()\{  
Sprite \*sprite = Sprite::create("s");  
this\->addChild(sprite);  
\});

**8.使用clone代替copy**

2.0  
CCMoveBy \*action = (CCMoveBy\*) move->copy();  
action->autorelease();  
3.0  
action = move->clone();  
不需要autorelease，在clone已经实现。

**9.Physics Integration 物理引擎**

暂无使用，box2d 在 3.0中可以延续使用

在3.0的Physics中需要定义 PhysicsWorld, PhysicsBody, PhysicsShape, PhysicsJoint 等，于box2d相仿，使用前需要定义CC\_USE\_PHYSICS

……继续等待补充

\----------------------------------------  
  
by 陈于喆   
QQ:34174409

Mail: dongbule@163.com

转载于:https://my.oschina.net/huicheng/blog/278727

[2019_Python_]: https://my.oschina.net/u/2663968/blog/3061697
[hot3.png]: /images/20220114/d517b9a543584a418c24c414d74c84c7.png
[12150629_qD4l.gif]: /images/20220114/5f616aae41a543628ae2fca8fb69897f.png