以下来自对 cocos2d-x-3.5 的源码分析,今天重点研究它的动态开辟的对象释放问题.
涉及以下3个基本的class 和一个模板类
手动引用计数类
class RefRef是 cocos2d 中很大一部分类的祖先类 . @H_404_19@Ref支持以下三个接口:
retain()累加引用计数,当我们将指针复制给新的指针的时候,请自觉手动调用! @H_404_19@release()指针释放无用或者即将挪作它用之前,自己自觉手动调用!@H_404_19@autorelease()将释放的任务交给当前的AutoreleasePool,这样程序员就不需要在意这个指针什么时候被释放或者挪作它用了. @H_404_19@
Ref对象池AutoreleasePool- 任何一个
AutoreleasePool对象构造的时候就会被压栈到下面的PoolManager中,析构的时候自动退栈 .@H_404_19@ AutoreleasePool会在clear或者析构的时候将自己管理的Ref自动release()一下. @H_404_19@AutoreleasePool支持:
- 添加
void addObject(Ref *object)@H_404_19@ - 查询
bool contains(Ref* object) const@H_404_19@ - 清除
void clear()@H_404_19@
- 添加
- 任何一个
对象池管理员
PoolManagerPoolManager是单例的 !
static PoolManager* getInstance()@H_404_19@
- 池子只能有压栈和退栈两个操作.
@H_404_19@ - 构造单例时候会自动构造一个
AutoreleasePool作为当前使用的池子.@H_404_19@ - 总是使用栈顶的池子.@H_404_19@
模板类
@H_404_19@RefPtr模拟shared_ptr
另外还有一个相关的class : class Clonable .
* 支持接口 Clonable* clone(),会复制Ref,重新开始计数.
可以看到 cocos2d-x 提供了基本的管理机制,但是需要依赖程序员的自觉性!!!
基于Ref的继承体系速查
RefDirector
DisplayLinkDirector@H_404_19@
EventListenerEventListenerAcceleration@H_404_19@EventListenerController@H_404_19@EventListenerCustom@H_404_19@EventListenerFocus@H_404_19@EventListenerKeyboard@H_404_19@EventListenerMouse@H_404_19@EventListenerTouchOneByOne@H_404_19@
Event
EventDispatcher@H_404_19@EventController@H_404_19@EventFocus@H_404_19@EventCustom@H_404_19@EventKeyboard@H_404_19@EventMouse@H_404_19@EventTouch@H_404_19@
Scheduler@H_404_19@ScriptHandlerEntry@H_404_19@Touch@H_404_19@ActionManager@H_404_19@Action:Cloneable
FiniteTimeAction
ActionInstant
StopGrid@H_404_19@
ActionInterval
GridAction
@H_404_19@AccelAmplitude@H_404_19@DeccelAmplitude@H_404_19@ActionEase
EaseBackIn@H_404_19@EaseBackInOut@H_404_19@EaseBackOut@H_404_19@EaseBezierAction@H_404_19@EaseBounce
@H_404_19@EaseCircleActionIn@H_404_19@EaseCircleActionInOut@H_404_19@EaseCircleActionOut@H_404_19@EaseCubicActionIn@H_404_19@EaseCubicActionInOut@H_404_19@
Animate@H_404_19@BezierBy@H_404_19@BezierTo@H_404_19@Blink@H_404_19@FadeTo
@H_404_19@JumpBy
JumpTo@H_404_19@
MoveBy
MoveTo@H_404_19@
Repeat@H_404_19@RepeatForever@H_404_19@ReverseTime@H_404_19@RotateBy@H_404_19@RotateTo@H_404_19@ScaleTo
ScaleBy@H_404_19@
TintBy@H_404_19@TintTo@H_404_19@TargetedAction@H_404_19@ProgressFromTo@H_404_19@ProgressTo@H_404_19@ActionTween@H_404_19@
Sequence@H_404_19@SkewTo
SkewBy@H_404_19@
Spawn@H_404_19@
Follow@H_404_19@Speed@H_404_19@ActionCamera
OrbitCamera@H_404_19@
PointArray@H_404_19@AnimationFrame : Cloneable@H_404_19@Animation : Cloneable@H_404_19@AnimationCache@H_404_19@Node
Camera@H_404_19@BaseLight
@H_404_19@AtlasNode
@H_404_19@ClippingNode@H_404_19@ClippingRectangleNode@H_404_19@DrawNode@H_404_19@TMXLayer@H_404_19@TMXTiledMap@H_404_19@LabelTTF:LabelProtocol,BlendProtocol@H_404_19@LabelBMFont:LabelProtocol,BlendProtocol@H_404_19@Layer
LayerMultiplex@H_404_19@LayerColor:BlendProtocol
LayerGradient@H_404_19@
Menu@H_404_19@MenuItem@H_404_19@ImageView
@H_404_19@
MotionStreak:TextureProtocol@H_404_19@NodeGrid@H_404_19@RenderTexture@H_404_19@ParallaxNode@H_404_19@ProtectedNode
Widget:LayoutParameterProtocol
Button@H_404_19@CheckBox@H_404_19@LoadingBar@H_404_19@Slider@H_404_19@Text@H_404_19@TextAtlas@H_404_19@TextBMFont@H_404_19@VideoPlayer@H_404_19@WebView@H_404_19@Layout:LayoutProtocol
RelativeBox@H_404_19@PageView@H_404_19@HBox@H_404_19@VBox@H_404_19@ScrollView
ListView@H_404_19@
ParticleBatchNode:TextureProtocol@H_404_19@ParticleSystem:TextureProtocol
ParticleSystemQuad
ParticleExplosion@H_404_19@ParticleMeteor@H_404_19@ParticleFire@H_404_19@ParticleFireworks@H_404_19@ParticleFlower@H_404_19@ParticleGalaxy@H_404_19@ParticleRain@H_404_19@ParticleSmoke@H_404_19@ParticleSnow@H_404_19@ParticleSpiral@H_404_19@ParticleSun@H_404_19@
Scene
TransitionScene
TransitionCrossFade@H_404_19@TransitionFade@H_404_19@TransitionJumpZoom@H_404_19@TransitionShrinkGrow:TransitionEaseScene@H_404_19@TransitionMoveInL:TransitionEaseScene
@H_404_19@TransitionSceneOriented
TransitionFlipAngular@H_404_19@TransitionFlipX@H_404_19@TransitionFlipY@H_404_19@TransitionZoomFlipX@H_404_19@TransitionZoomFlipY@H_404_19@
TransitionFadeTR:TransitionEaseScene
@H_404_19@TransitionSlideInL:TransitionEaseScene
@H_404_19@TransitionSplitCols:TransitionEaseScene
TransitionSplitRows@H_404_19@
TransitionTurnOffTiles@H_404_19@TransitionPageTurn@H_404_19@TransitionProgress@H_404_19@
Sprite:TextureProtocol@H_404_19@SpriteBatchNode:TextureProtocol
TMXLayer@H_404_19@
TMXTiledMap@H_404_19@
Component
@H_404_19@FontAtlas@H_404_19@Grabber@H_404_19@GridBase
@H_404_19@SpriteFrame:Clonable@H_404_19@SpriteFrameCache@H_404_19@TMXObjectGroup@H_404_19@TMXLayerInfo@H_404_19@LayoutManager@H_404_19@RichElement@H_404_19@GLView@H_404_19@
