cocos2dx3.0rc导出自定义类到lua的方法详细步骤

概述我写了一个用3.0的工具导出类到lua，自动生成代码的方法。 以前要导出c++类到lua，就得手动维护pkg文件，那简直就是噩梦，3.0以后就会感觉生活很轻松了。 下面我就在说下具体做法。 1、安装必要的库和工具包，以及配置相关环境变量，请按照cocos2d-x-3.0rc0\tools\tolua\README.mdown说得去做，不做赘述。 2、写c++类(我测试用的是cocos2d-x-3. 我写了一个用3.0的工具导出类到lua，自动生成代码的方法。

以前要导出c++类到lua，就得手动维护pkg文件，那简直就是噩梦，3.0以后就会感觉生活很轻松了。
下面我就在说下具体做法。
1、安装必要的库和工具包，以及配置相关环境变量，请按照cocos2d-x-3.0rc0\tools\tolua\README.mdown说得去做，不做赘述。
2、写c++类(我测试用的是cocos2d-x-3.0rc0\tests\lua-empty-test\project\Classes\HelloWorldScene.cpp)
3、写一个生成的python脚本，你不会写，没关系，我们会照猫画虎
1）进入目录cocos2d-x-3.0rc0\tools\tolua，复制一份genbindings.py，命名为genbindings_myclass.py
2）把生成目录制定到咱工程里去，打开genbindings_myclass.py把
@H_404_22@?

1	output_dir = '%s/cocos/scripting/lua-bindings/auto' % project_root

改成
'%s/tests/lua-empty-test/project/Classes/auto' 3）修改命令参数,把
1 2 3 4 5 6 7 cmd_args = { 'cocos2dx.ini' : ( 'cocos2d-x' , 'lua_cocos2dx_auto' ),\ 'cocos2dx_extension.ini' 'cocos2dx_extension' 'lua_cocos2dx_extension_auto' 'cocos2dx_ui.ini' 'cocos2dx_ui' 'lua_cocos2dx_ui_auto' 'cocos2dx_studio.ini' 'cocos2dx_studio' 'lua_cocos2dx_studio_auto' 'cocos2dx_spine.ini' 'cocos2dx_spine' 'lua_cocos2dx_spine_auto' 'cocos2dx_physics.ini' 'cocos2dx_physics' 'lua_cocos2dx_physics_auto' } 'myclass.ini' 'myclass' 'lua_myclass_auto' ) } 4）这时你可能问myclass.ini在哪啊，我们下来就写这个文件。原理一样，我还是照猫画虎，拿cocos2dx_spine.ini改的。
7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 [myclass] # the prefix to be added to the generated functions. You might or might not use this in your own # templates prefix = myclass # create a target namespace (in JavaScript,this would create some code like the equiv. to `ns = ns || {}`) # all classes will be embedded in that namespace target_namespace = androID_headers = -I%(androIDndkdir)s/platforms/androID-14/arch-arm/usr/include -I%(androIDndkdir)s/sources/cxx-stl/gnu-libstdc++/4.7/libs/armeabi-v7a/include -I%(androIDndkdir)s/sources/cxx-stl/gnu-libstdc++/4.7/include androID_flags = -D_SIZE_T_defineD_ clang_headers = -I%(clangllvmdir)s/lib/clang/3.3/include clang_flags = -nostdinc -x c++ -std=c++11 cocos_headers = -I%(cocosdir)s/cocos -I%(cocosdir)s/cocos/2d -I%(cocosdir)s/cocos/base -I%(cocosdir)s/cocos/ui -I%(cocosdir)s/cocos/physics -I%(cocosdir)s/cocos/2d/platform -I%(cocosdir)s/cocos/2d/platform/androID -I%(cocosdir)s/cocos/math/kazmath -I%(cocosdir)s/extensions -I%(cocosdir)s/external -I%(cocosdir)s/cocos/editor-support -I%(cocosdir)s cocos_flags = -DANDROID -DCOCOS2D_JavaScript cxxgenerator_headers = # extra arguments for clang extra_arguments = %(androID_headers)s %(clang_headers)s %(cxxgenerator_headers)s %(cocos_headers)s %(androID_flags)s %(clang_flags)s %(cocos_flags)s %(extra_flags)s # what headers to parse headers = %(cocosdir)s/tests/lua-empty- test /project/Classes/HelloWorldScene.h # what classes to produce code for. You can use regular Expressions here. When testing the regular @H_850_404@ # Expression,it will be enclosed in "^$",like this: "^Menu*$". classes = HelloWorld # what should we skip? in the format Classname::[function function] # Classname is a regular Expression,but will be used like this: "^Classname$" functions are also # regular Expressions,they will not be surrounded by "^$". If you want to skip a whole class,just # add a single "*" as functions. See bellow for several examples. A special class name is "*",which # will apply to all class names. This is a convenIEnce wildcard to be able to skip similar named # functions from all classes. skip = rename_functions = rename_classes = # for all class names,should we remove something when registering in the target VM? remove_prefix = # classes for which there will be no "parent" lookup classes_have_no_parents = # base classes which will be skipped when their sub-classes found them. base_classes_to_skip = Ref ProcessBase # classes that create no constructor # Set is special and we will use a hand-written constructor abstract_classes = # Determining whether to use script object(Js object) to control the lifecycle of native(cpp) object or the other way around. Supported values are 'yes' or 'no'. script_control_cpp = no 改的时候要注意这些行
[myclass] prefix = myclass target_namespace = /project/Classes/HelloWorldScene.h classes = HelloWorld skip = abstract_classes = 4、下面要自动生成代码了，打开命令行工具，cd到cocos2d-x-3.0rc0\tools\tolua下，敲入
python genbindings_myclass.py 回车运行。如果前面没问题的话你会在cocos2d-x-3.0rc0\tests\lua-empty-test\project\Classes多了一个文件夹auto，然后把里面生成lua_myclass_auto.cpp和lua_myclass_auto.hpp加入拽如工程
5、把我们生成的个module在脚本引擎初始化的时候加入lua。
编辑AppDelegate.cpp，包含lua_myclass_auto.hpp头文件，在
LuaEngine* engine = LuaEngine::getInstance(); 后面加入
register_all_myclass(engine->getLuaStack()->getLuaState());
6、编译运行。这样HelloWorld这个类就被导出到lua了。
测试------------------------------------------------
打开hello.lua，编辑local function main()这个函数
把前面改成
15 local function main() -- avoID memory leak collectgarbage ( "setpause" "setstepmul" local hello = HelloWorld:create() sceneGame = cc.Scene:create() sceneGame:addChild(hello) cc.Director:getInstance():runWithScene(sceneGame) if (1==1) then return end …… …… 总结

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