【cocos2d-x从c++到js】注册函数

标签：cocos2dx obj JSPROP register c++ js cx cocos2d

前面的文章中讲过，在游戏启动时，会调用大量的addRegisterCallback函数，向SpiderMonkey注册Cocos2d-x引擎的函数。

`ScriptingCore* sc = ScriptingCore::getInstance();` `sc->addRegisterCallback(register_all_cocos2dx);` `sc->addRegisterCallback(register_all_cocos2dx_extension);` `sc->addRegisterCallback(register_cocos2dx_js_extensions);` `sc->addRegisterCallback(register_all_cocos2dx_extension_manual);` `sc->addRegisterCallback(jsb_register_chipmunk);` `sc->addRegisterCallback(JSB_register_opengl);` `sc->addRegisterCallback(jsb_register_system);` `sc->addRegisterCallback(MinXmlHttpRequest::_js_register);` `sc->addRegisterCallback(register_jsb_websocket);` `sc->addRegisterCallback(register_all_cocos2dx_builder);` `sc->addRegisterCallback(register_CCBuilderReader);` `sc->addRegisterCallback(register_all_cocos2dx_gui);` `sc->addRegisterCallback(register_all_cocos2dx_gui_manual);` `sc->addRegisterCallback(register_all_cocos2dx_studio);` `sc->addRegisterCallback(register_all_cocos2dx_studio_manual);` `sc->addRegisterCallback(register_all_cocos2dx_spine);` `sc->start();`

以register_all_cocos2dx注册函数为例，跳转到实现代码：

`void` `register_all_cocos2dx(JSContext* cx, JSObject* obj) {` `// first, try to get the ns` `JS::RootedValue nsval(cx);` `JSObject *ns;` `JS_GetProperty(cx, obj,` `"cc"` `, &nsval);` `if` `(nsval == JSVAL_VOID) {` `ns = JS_NewObject(cx, NULL, NULL, NULL);` `nsval = OBJECT_TO_JSVAL(ns);` `JS_SetProperty(cx, obj,` `"cc"` `, nsval);` `}` `else` `{` `JS_ValueToObject(cx, nsval, &ns);` `}` `obj = ns;` `js_register_cocos2dx_Action(cx, obj);` `js_register_cocos2dx_FiniteTimeAction(cx, obj);` `js_register_cocos2dx_ActionInstant(cx, obj);` `js_register_cocos2dx_Hide(cx, obj);` `js_register_cocos2dx_Node(cx, obj);` `js_register_cocos2dx_Scene(cx, obj);` `js_register_cocos2dx_TransitionScene(cx, obj);` `js_register_cocos2dx_TransitionEaseScene(cx, obj);` `js_register_cocos2dx_TransitionMoveInL(cx, obj);` `js_register_cocos2dx_TransitionMoveInB(cx, obj);` `js_register_cocos2dx_Layer(cx, obj);` `js_register_cocos2dx___LayerRGBA(cx, obj);` `js_register_cocos2dx_AtlasNode(cx, obj);` `js_register_cocos2dx_TileMapAtlas(cx, obj);` `js_register_cocos2dx_TransitionMoveInT(cx, obj);` `js_register_cocos2dx_TransitionMoveInR(cx, obj);` `js_register_cocos2dx_ParticleSystem(cx, obj);` `js_register_cocos2dx_ParticleSystemQuad(cx, obj);` `js_register_cocos2dx_ParticleSnow(cx, obj);` `js_register_cocos2dx_ActionInterval(cx, obj);` `js_register_cocos2dx_ActionCamera(cx, obj);` `js_register_cocos2dx_ProgressFromTo(cx, obj);` `js_register_cocos2dx_MoveBy(cx, obj);` `js_register_cocos2dx_MoveTo(cx, obj);` `js_register_cocos2dx_JumpBy(cx, obj);` `js_register_cocos2dx_ActionEase(cx, obj);` `js_register_cocos2dx_EaseBounce(cx, obj);` `js_register_cocos2dx_EaseBounceIn(cx, obj);` `js_register_cocos2dx_TransitionRotoZoom(cx, obj);` `js_register_cocos2dx_Director(cx, obj);` `js_register_cocos2dx_Texture2D(cx, obj);` `js_register_cocos2dx_EaseElastic(cx, obj);` `js_register_cocos2dx_EaseElasticOut(cx, obj);` `js_register_cocos2dx_EaseBackOut(cx, obj);` `js_register_cocos2dx_TransitionSceneOriented(cx, obj);` `js_register_cocos2dx_TransitionFlipX(cx, obj);` `js_register_cocos2dx_Spawn(cx, obj);` `js_register_cocos2dx_SimpleAudioEngine(cx, obj);` `js_register_cocos2dx_SkewTo(cx, obj);` `js_register_cocos2dx_SkewBy(cx, obj);` `js_register_cocos2dx_TransitionProgress(cx, obj);` `js_register_cocos2dx_TransitionProgressVertical(cx, obj);` `js_register_cocos2dx_TMXTiledMap(cx, obj);` `js_register_cocos2dx_GridAction(cx, obj);` `js_register_cocos2dx_Grid3DAction(cx, obj);` `js_register_cocos2dx_FadeIn(cx, obj);` `js_register_cocos2dx_AnimationCache(cx, obj);` `js_register_cocos2dx_FlipX3D(cx, obj);` `js_register_cocos2dx_FlipY3D(cx, obj);` `js_register_cocos2dx_EaseSineInOut(cx, obj);` `js_register_cocos2dx_TransitionFlipAngular(cx, obj);` `js_register_cocos2dx_EGLViewProtocol(cx, obj);` `js_register_cocos2dx_EGLView(cx, obj);` `js_register_cocos2dx_EaseElasticInOut(cx, obj);` `js_register_cocos2dx_Show(cx, obj);` `js_register_cocos2dx_FadeOut(cx, obj);` `js_register_cocos2dx_CallFunc(cx, obj);` `js_register_cocos2dx_Waves3D(cx, obj);` `js_register_cocos2dx_ParticleFireworks(cx, obj);` `js_register_cocos2dx_MenuItem(cx, obj);` `js_register_cocos2dx_MenuItemSprite(cx, obj);` `js_register_cocos2dx_MenuItemImage(cx, obj);` `js_register_cocos2dx_ParticleFire(cx, obj);` `js_register_cocos2dx_TransitionZoomFlipAngular(cx, obj);` `js_register_cocos2dx_EaseRateAction(cx, obj);` `js_register_cocos2dx_EaseIn(cx, obj);` `js_register_cocos2dx_EaseExponentialInOut(cx, obj);` `js_register_cocos2dx_EaseBackInOut(cx, obj);` `js_register_cocos2dx_EaseExponentialOut(cx, obj);` `js_register_cocos2dx_SpriteBatchNode(cx, obj);` `js_register_cocos2dx_Label(cx, obj);` `js_register_cocos2dx_Application(cx, obj);` `js_register_cocos2dx_DelayTime(cx, obj);` `js_register_cocos2dx_LabelAtlas(cx, obj);` `js_register_cocos2dx_LabelBMFont(cx, obj);` `js_register_cocos2dx_TransitionFadeTR(cx, obj);` `js_register_cocos2dx_TransitionFadeBL(cx, obj);` `js_register_cocos2dx_EaseElasticIn(cx, obj);` `js_register_cocos2dx_ParticleSpiral(cx, obj);` `js_register_cocos2dx_TiledGrid3DAction(cx, obj);` `js_register_cocos2dx_FadeOutTRTiles(cx, obj);` `js_register_cocos2dx_FadeOutUpTiles(cx, obj);` `js_register_cocos2dx_FadeOutDownTiles(cx, obj);` `js_register_cocos2dx_TextureCache(cx, obj);` `js_register_cocos2dx_ActionTween(cx, obj);` `js_register_cocos2dx_TransitionFadeDown(cx, obj);` `js_register_cocos2dx_ParticleSun(cx, obj);` `js_register_cocos2dx_TransitionProgressHorizontal(cx, obj);` `js_register_cocos2dx_TMXObjectGroup(cx, obj);` `js_register_cocos2dx_TMXLayer(cx, obj);` `js_register_cocos2dx_FlipX(cx, obj);` `js_register_cocos2dx_FlipY(cx, obj);` `js_register_cocos2dx_TransitionSplitCols(cx, obj);` `js_register_cocos2dx_Timer(cx, obj);` `js_register_cocos2dx_FadeTo(cx, obj);` `js_register_cocos2dx_Repeat(cx, obj);` `js_register_cocos2dx_Place(cx, obj);` `js_register_cocos2dx_GLProgram(cx, obj);` `js_register_cocos2dx_EaseBounceOut(cx, obj);` `js_register_cocos2dx_RenderTexture(cx, obj);` `js_register_cocos2dx_TintBy(cx, obj);` `js_register_cocos2dx_TransitionShrinkGrow(cx, obj);` `js_register_cocos2dx_Sprite(cx, obj);` `js_register_cocos2dx_LabelTTF(cx, obj);` `js_register_cocos2dx_ClippingNode(cx, obj);` `js_register_cocos2dx_ParticleFlower(cx, obj);` `js_register_cocos2dx_ParticleSmoke(cx, obj);` `js_register_cocos2dx_LayerMultiplex(cx, obj);` `js_register_cocos2dx_Blink(cx, obj);` `js_register_cocos2dx_ShaderCache(cx, obj);` `js_register_cocos2dx_JumpTo(cx, obj);` `js_register_cocos2dx_ParticleExplosion(cx, obj);` `js_register_cocos2dx_TransitionJumpZoom(cx, obj);` `js_register_cocos2dx_Touch(cx, obj);` `js_register_cocos2dx_AnimationFrame(cx, obj);` `js_register_cocos2dx_NodeGrid(cx, obj);` `js_register_cocos2dx_TMXLayerInfo(cx, obj);` `js_register_cocos2dx_TMXTilesetInfo(cx, obj);` `js_register_cocos2dx_GridBase(cx, obj);` `js_register_cocos2dx_TiledGrid3D(cx, obj);` `js_register_cocos2dx_ParticleGalaxy(cx, obj);` `js_register_cocos2dx_Twirl(cx, obj);` `js_register_cocos2dx_MenuItemLabel(cx, obj);` `js_register_cocos2dx_LayerColor(cx, obj);` `js_register_cocos2dx_FadeOutBLTiles(cx, obj);` `js_register_cocos2dx_LayerGradient(cx, obj);` `js_register_cocos2dx_TargetedAction(cx, obj);` `js_register_cocos2dx_RepeatForever(cx, obj);` `js_register_cocos2dx_CardinalSplineTo(cx, obj);` `js_register_cocos2dx_CardinalSplineBy(cx, obj);` `js_register_cocos2dx_TransitionFlipY(cx, obj);` `js_register_cocos2dx_TurnOffTiles(cx, obj);` `js_register_cocos2dx_TintTo(cx, obj);` `js_register_cocos2dx_CatmullRomTo(cx, obj);` `js_register_cocos2dx_ToggleVisibility(cx, obj);` `js_register_cocos2dx_DrawNode(cx, obj);` `js_register_cocos2dx_TransitionTurnOffTiles(cx, obj);` `js_register_cocos2dx_RotateTo(cx, obj);` `js_register_cocos2dx_TransitionSplitRows(cx, obj);` `js_register_cocos2dx_TransitionProgressRadialCCW(cx, obj);` `js_register_cocos2dx_ScaleTo(cx, obj);` `js_register_cocos2dx_TransitionPageTurn(cx, obj);` `js_register_cocos2dx_BezierBy(cx, obj);` `js_register_cocos2dx_BezierTo(cx, obj);` `js_register_cocos2dx_Menu(cx, obj);` `js_register_cocos2dx_SpriteFrame(cx, obj);` `js_register_cocos2dx_ActionManager(cx, obj);` `js_register_cocos2dx_TransitionFade(cx, obj);` `js_register_cocos2dx_TransitionZoomFlipX(cx, obj);` `js_register_cocos2dx_SpriteFrameCache(cx, obj);` `js_register_cocos2dx_TransitionCrossFade(cx, obj);` `js_register_cocos2dx_Ripple3D(cx, obj);` `js_register_cocos2dx_TransitionSlideInL(cx, obj);` `js_register_cocos2dx_TransitionSlideInT(cx, obj);` `js_register_cocos2dx_StopGrid(cx, obj);` `js_register_cocos2dx_ShakyTiles3D(cx, obj);` `js_register_cocos2dx_PageTurn3D(cx, obj);` `js_register_cocos2dx_Grid3D(cx, obj);` `js_register_cocos2dx_TransitionProgressInOut(cx, obj);` `js_register_cocos2dx_EaseBackIn(cx, obj);` `js_register_cocos2dx_SplitRows(cx, obj);` `js_register_cocos2dx_Follow(cx, obj);` `js_register_cocos2dx_Animate(cx, obj);` `js_register_cocos2dx_ShuffleTiles(cx, obj);` `js_register_cocos2dx_ProgressTimer(cx, obj);` `js_register_cocos2dx_ParticleMeteor(cx, obj);` `js_register_cocos2dx_EaseInOut(cx, obj);` `js_register_cocos2dx_TransitionZoomFlipY(cx, obj);` `js_register_cocos2dx_ScaleBy(cx, obj);` `js_register_cocos2dx_Lens3D(cx, obj);` `js_register_cocos2dx_Animation(cx, obj);` `js_register_cocos2dx_TMXMapInfo(cx, obj);` `js_register_cocos2dx_EaseExponentialIn(cx, obj);` `js_register_cocos2dx_ReuseGrid(cx, obj);` `js_register_cocos2dx_MenuItemAtlasFont(cx, obj);` `js_register_cocos2dx_Liquid(cx, obj);` `js_register_cocos2dx_OrbitCamera(cx, obj);` `js_register_cocos2dx_ParticleBatchNode(cx, obj);` `js_register_cocos2dx_Component(cx, obj);` `js_register_cocos2dx_TextFieldTTF(cx, obj);` `js_register_cocos2dx_ParticleRain(cx, obj);` `js_register_cocos2dx_Waves(cx, obj);` `js_register_cocos2dx_EaseOut(cx, obj);` `js_register_cocos2dx_MenuItemFont(cx, obj);` `js_register_cocos2dx_TransitionFadeUp(cx, obj);` `js_register_cocos2dx_EaseSineOut(cx, obj);` `js_register_cocos2dx_JumpTiles3D(cx, obj);` `js_register_cocos2dx_MenuItemToggle(cx, obj);` `js_register_cocos2dx_RemoveSelf(cx, obj);` `js_register_cocos2dx_SplitCols(cx, obj);` `js_register_cocos2dx_MotionStreak(cx, obj);` `js_register_cocos2dx_RotateBy(cx, obj);` `js_register_cocos2dx_FileUtils(cx, obj);` `js_register_cocos2dx_ProgressTo(cx, obj);` `js_register_cocos2dx_TransitionProgressOutIn(cx, obj);` `js_register_cocos2dx_CatmullRomBy(cx, obj);` `js_register_cocos2dx_Sequence(cx, obj);` `js_register_cocos2dx_Shaky3D(cx, obj);` `js_register_cocos2dx_TransitionProgressRadialCW(cx, obj);` `js_register_cocos2dx_EaseBounceInOut(cx, obj);` `js_register_cocos2dx_TransitionSlideInR(cx, obj);` `js_register_cocos2dx___NodeRGBA(cx, obj);` `js_register_cocos2dx_ParallaxNode(cx, obj);` `js_register_cocos2dx_Scheduler(cx, obj);` `js_register_cocos2dx_EaseSineIn(cx, obj);` `js_register_cocos2dx_WavesTiles3D(cx, obj);` `js_register_cocos2dx_TransitionSlideInB(cx, obj);` `js_register_cocos2dx_Speed(cx, obj);` `js_register_cocos2dx_ShatteredTiles3D(cx, obj);` `}`

首先看到的是从根对象中获取一个“cc”属性（如果获取不到，就新建一个），因为JS中没有名字空间的概念，所以我们使用一个cc对象来表示类似的功能。所有的类型和函数都是这个cc对象下面的属性。在Cocos2d-x 3.0中，C++层面，类名去掉了CC的前缀，和js保持一致。

然后就是一大堆子函数，每个函数都负责注册一个对应的类。打开js_register_cocos2dx_Sprite，这个函数负责注册Sprite类。

打开js_register_cocos2dx_Sprite的实现代码

`void` `js_register_cocos2dx_Sprite(JSContext cx, JSObject global) {` `jsb_cocos2d_Sprite_class = (JSClass )` `calloc` `(1,` `sizeof` `(JSClass));` `jsb_cocos2d_Sprite_class->name =` `"Sprite"` `;` `jsb_cocos2d_Sprite_class->addProperty = JS_PropertyStub;` `jsb_cocos2d_Sprite_class->delProperty = JS_DeletePropertyStub;` `jsb_cocos2d_Sprite_class->getProperty = JS_PropertyStub;` `jsb_cocos2d_Sprite_class->setProperty = JS_StrictPropertyStub;` `jsb_cocos2d_Sprite_class->enumerate = JS_EnumerateStub;` `jsb_cocos2d_Sprite_class->resolve = JS_ResolveStub;` `jsb_cocos2d_Sprite_class->convert = JS_ConvertStub;` `jsb_cocos2d_Sprite_class->finalize = js_cocos2d_Sprite_finalize;` `jsb_cocos2d_Sprite_class->flags = JSCLASS_HAS_RESERVED_SLOTS(2);` `static` `JSPropertySpec properties[] = {` `{0, 0, 0, JSOP_NULLWRAPPER, JSOP_NULLWRAPPER}` `};` `static` `JSFunctionSpec funcs[] = {` `JS_FN(` `"setSpriteFrame"` `, js_cocos2dx_Sprite_setSpriteFrame, 1, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"setTexture"` `, js_cocos2dx_Sprite_setTexture, 1, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"getTexture"` `, js_cocos2dx_Sprite_getTexture, 0, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"setFlippedY"` `, js_cocos2dx_Sprite_setFlippedY, 1, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"setFlippedX"` `, js_cocos2dx_Sprite_setFlippedX, 1, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"getBatchNode"` `, js_cocos2dx_Sprite_getBatchNode, 0, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"getOffsetPosition"` `, js_cocos2dx_Sprite_getOffsetPosition, 0, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"removeAllChildrenWithCleanup"` `, js_cocos2dx_Sprite_removeAllChildrenWithCleanup, 1, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"updateQuadVertices"` `, js_cocos2dx_Sprite_updateQuadVertices, 0, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"updateTransform"` `, js_cocos2dx_Sprite_updateTransform, 0, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"setTextureRect"` `, js_cocos2dx_Sprite_setTextureRect, 1, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"isFrameDisplayed"` `, js_cocos2dx_Sprite_isFrameDisplayed, 1, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"getAtlasIndex"` `, js_cocos2dx_Sprite_getAtlasIndex, 0, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"setBatchNode"` `, js_cocos2dx_Sprite_setBatchNode, 1, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"setDisplayFrameWithAnimationName"` `, js_cocos2dx_Sprite_setDisplayFrameWithAnimationName, 2, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"setTextureAtlas"` `, js_cocos2dx_Sprite_setTextureAtlas, 1, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"getSpriteFrame"` `, js_cocos2dx_Sprite_getSpriteFrame, 0, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"isDirty"` `, js_cocos2dx_Sprite_isDirty, 0, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"setAtlasIndex"` `, js_cocos2dx_Sprite_setAtlasIndex, 1, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"setDirty"` `, js_cocos2dx_Sprite_setDirty, 1, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"isTextureRectRotated"` `, js_cocos2dx_Sprite_isTextureRectRotated, 0, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"getTextureRect"` `, js_cocos2dx_Sprite_getTextureRect, 0, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"getTextureAtlas"` `, js_cocos2dx_Sprite_getTextureAtlas, 0, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"isFlippedX"` `, js_cocos2dx_Sprite_isFlippedX, 0, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"isFlippedY"` `, js_cocos2dx_Sprite_isFlippedY, 0, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"setVertexRect"` `, js_cocos2dx_Sprite_setVertexRect, 1, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"ctor"` `, js_cocos2d_Sprite_ctor, 0, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FS_END` `};` `static` `JSFunctionSpec st_funcs[] = {` `JS_FN(` `"create"` `, js_cocos2dx_Sprite_create, 0, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"createWithTexture"` `, js_cocos2dx_Sprite_createWithTexture, 1, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"createWithSpriteFrameName"` `, js_cocos2dx_Sprite_createWithSpriteFrameName, 1, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"createWithSpriteFrame"` `, js_cocos2dx_Sprite_createWithSpriteFrame, 1, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FS_END` `};` `jsb_cocos2d_Sprite_prototype = JS_InitClass(` `cx, global,` `jsb_cocos2d_Node_prototype,` `jsb_cocos2d_Sprite_class,` `dummy_constructor<cocos2d::Sprite>, 0,` `// no constructor` `properties,` `funcs,` `NULL,` `// no static properties` `st_funcs);` `// make the class enumerable in the registered namespace` `JSBool found;` `JS_SetPropertyAttributes(cx, global,` `"Sprite"` `, JSPROP_ENUMERATE \| JSPROP_READONLY, &found);` `// add the proto and JSClass to the type->js info hash table` `TypeTest<cocos2d::Sprite> t;` `js_type_class_t p;` `std::string typeName = t.s_name();` `if` `(_js_global_type_map.find(typeName) == _js_global_type_map.end())` `{` `p = (js_type_class_t *)` `malloc` `(` `sizeof` `(js_type_class_t));` `p->jsclass = jsb_cocos2d_Sprite_class;` `p->proto = jsb_cocos2d_Sprite_prototype;` `p->parentProto = jsb_cocos2d_Node_prototype;` `_js_global_type_map.insert(std::make_pair(typeName, p));` `}` `}`

看起来比较长，其实很简单，我们一段一段分析。

`jsb_cocos2d_Sprite_class = (JSClass *)` `calloc` `(1,` `sizeof` `(JSClass));` `jsb_cocos2d_Sprite_class->name =` `"Sprite"` `;` `jsb_cocos2d_Sprite_class->addProperty = JS_PropertyStub;` `jsb_cocos2d_Sprite_class->delProperty = JS_DeletePropertyStub;` `jsb_cocos2d_Sprite_class->getProperty = JS_PropertyStub;` `jsb_cocos2d_Sprite_class->setProperty = JS_StrictPropertyStub;` `jsb_cocos2d_Sprite_class->enumerate = JS_EnumerateStub;` `jsb_cocos2d_Sprite_class->resolve = JS_ResolveStub;` `jsb_cocos2d_Sprite_class->convert = JS_ConvertStub;` `jsb_cocos2d_Sprite_class->finalize = js_cocos2d_Sprite_finalize;` `jsb_cocos2d_Sprite_class->flags = JSCLASS_HAS_RESERVED_SLOTS(2);`

finalize函数替换成自己的函数了。最后那个参数表示这个类，有几个Reserved Slots槽，这东西我们在之前讲回调函数的时候见过。

`static` `JSPropertySpec properties[] = {` `{0, 0, 0, JSOP_NULLWRAPPER, JSOP_NULLWRAPPER}` `};` `static` `JSFunctionSpec funcs[] = {` `JS_FN(` `"setSpriteFrame"` `, js_cocos2dx_Sprite_setSpriteFrame, 1, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"setTexture"` `, js_cocos2dx_Sprite_setTexture, 1, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"getTexture"` `, js_cocos2dx_Sprite_getTexture, 0, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"setFlippedY"` `, js_cocos2dx_Sprite_setFlippedY, 1, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"setFlippedX"` `, js_cocos2dx_Sprite_setFlippedX, 1, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"getBatchNode"` `, js_cocos2dx_Sprite_getBatchNode, 0, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"getOffsetPosition"` `, js_cocos2dx_Sprite_getOffsetPosition, 0, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"removeAllChildrenWithCleanup"` `, js_cocos2dx_Sprite_removeAllChildrenWithCleanup, 1, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"updateQuadVertices"` `, js_cocos2dx_Sprite_updateQuadVertices, 0, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"updateTransform"` `, js_cocos2dx_Sprite_updateTransform, 0, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"setTextureRect"` `, js_cocos2dx_Sprite_setTextureRect, 1, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"isFrameDisplayed"` `, js_cocos2dx_Sprite_isFrameDisplayed, 1, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"getAtlasIndex"` `, js_cocos2dx_Sprite_getAtlasIndex, 0, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"setBatchNode"` `, js_cocos2dx_Sprite_setBatchNode, 1, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"setDisplayFrameWithAnimationName"` `, js_cocos2dx_Sprite_setDisplayFrameWithAnimationName, 2, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"setTextureAtlas"` `, js_cocos2dx_Sprite_setTextureAtlas, 1, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"getSpriteFrame"` `, js_cocos2dx_Sprite_getSpriteFrame, 0, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"isDirty"` `, js_cocos2dx_Sprite_isDirty, 0, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"setAtlasIndex"` `, js_cocos2dx_Sprite_setAtlasIndex, 1, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"setDirty"` `, js_cocos2dx_Sprite_setDirty, 1, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"isTextureRectRotated"` `, js_cocos2dx_Sprite_isTextureRectRotated, 0, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"getTextureRect"` `, js_cocos2dx_Sprite_getTextureRect, 0, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"getTextureAtlas"` `, js_cocos2dx_Sprite_getTextureAtlas, 0, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"isFlippedX"` `, js_cocos2dx_Sprite_isFlippedX, 0, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"isFlippedY"` `, js_cocos2dx_Sprite_isFlippedY, 0, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"setVertexRect"` `, js_cocos2dx_Sprite_setVertexRect, 1, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"ctor"` `, js_cocos2d_Sprite_ctor, 0, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FS_END` `};` `static` `JSFunctionSpec st_funcs[] = {` `JS_FN(` `"create"` `, js_cocos2dx_Sprite_create, 0, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"createWithTexture"` `, js_cocos2dx_Sprite_createWithTexture, 1, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"createWithSpriteFrameName"` `, js_cocos2dx_Sprite_createWithSpriteFrameName, 1, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FN(` `"createWithSpriteFrame"` `, js_cocos2dx_Sprite_createWithSpriteFrame, 1, JSPROP_PERMANENT \| JSPROP_ENUMERATE),` `JS_FS_END` `};`

`jsb_cocos2d_Sprite_prototype = JS_InitClass(` `cx, global,` `jsb_cocos2d_Node_prototype,` `jsb_cocos2d_Sprite_class,` `dummy_constructor<cocos2d::Sprite>, 0,` `// no constructor` `properties,` `funcs,` `NULL,` `// no static properties` `st_funcs);` `// make the class enumerable in the registered namespace` `JSBool found;` `JS_SetPropertyAttributes(cx, global,` `"Sprite"` `, JSPROP_ENUMERATE \| JSPROP_READONLY, &found);`

global（就是之前的cc对象）的一个属性。最后，设置好访问特性。

`TypeTest<cocos2d::Sprite> t;` `js_type_class_t p;` `std::string typeName = t.s_name();` `if` `(_js_global_type_map.find(typeName) == _js_global_type_map.end())` `{` `p = (js_type_class_t )` `malloc` `(` `sizeof` `(js_type_class_t));` `p->jsclass = jsb_cocos2d_Sprite_class;` `p->proto = jsb_cocos2d_Sprite_prototype;` `p->parentProto = jsb_cocos2d_Node_prototype;` `_js_global_type_map.insert(std::make_pair(typeName, p));` `}`

最后这段代码是Cocos2d-x引擎自己做的一个设计，把类型信息存到一个map里，这个设计以后会经常见到。可以用来查询，另外在JS虚拟机清空时，也用来遍历删除对应的类型信息。做法是先放到一个map里，然后cleanup时遍历这个map即可。就不赘述了。

标签：cocos2dx,obj,JSPROP,register,c++,js,cx,cocos2d
From： https://blog.51cto.com/u_15923385/5971860

【cocos2d-x从c++到js】注册函数

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