cocos2d-x 3.x LuaBinding之LUA_FUNCTION（只为记录）

cocos2d-x 3.x  LuaBinding之LUA_FUNCTION
转载至 http://www.cocoachina.com/bbs/read.php?tid-331648.html

用cocos2d-x+lua很久了，一直以来都在学习，相信很多童鞋都会有一个问题，就是从2.x转到3.x的时候会有点不适应， 那就是tolua里面不能直接使用LUA_FUNCTION了。之前我也在纠结过， 后面看过很多大神的帖子， 都是使用ScriptHandlerMgr代替，我也用过， 但是感觉不是特别的方便， 然后我就折腾了一下tolua的转换， 没想到真被我找到方法了。

首先大家先找到这个文件： conversions.yaml。 
不出意外的话， 应该在这个路径下 /frameworks/cocos2d-x/tools/bindings-generator/targets/lua/conversions.yaml

打开这个文件之后， 大家会看到定义了很多内容(大家都不用管)， 找到 to_native: 节点， 看到这个节点我相信你也就明白是如何绑定c++类了吧。 没错， 就是你想的这样，在这个节点下面加入一句话就ok了， 这句话就是：

"LUA_FUNCTION": "${out_value} = toluafix_ref_function(tolua_S, ${arg_idx}, 0); ok &= ${out_value} >= 0"

加入之后应该是这样的

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  to_native:

   # lua to native

   int:"ok &= luaval_to_int32(tolua_S, ${arg_idx},(int *)&${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   "unsigned int":"ok &= luaval_to_uint32(tolua_S, ${arg_idx},&${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   "unsigned char":"ok &= luaval_to_uint16(tolua_S, ${arg_idx},&${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   short:"ok &= luaval_to_int32(tolua_S, ${arg_idx},&${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   "unsigned short":"ok &= luaval_to_ushort(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   char:"ok &= luaval_to_int32(tolua_S, ${arg_idx},&${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   bool:"ok &= luaval_to_boolean(tolua_S, ${arg_idx},&${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   float:"ok &= luaval_to_number(tolua_S, ${arg_idx},&${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   double:"ok &= luaval_to_number(tolua_S, ${arg_idx},&${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   long:"ok &= luaval_to_long(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   ssize_t:"ok &= luaval_to_ssize(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   "unsigned long":"ok &= luaval_to_ulong(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   "long long":"ok &= luaval_to_long_long(tolua_S, ${arg_idx},&${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   "std::string":"ok &= luaval_to_std_string(tolua_S, ${arg_idx},&${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   "String*":"std::string ${out_value}_tmp; ok &= luaval_to_std_string(tolua_S, ${arg_idx}, &${out_value}_tmp, \"${lua_namespaced_class_name}:${func_name}\"); ${out_value} = cocos2d::String::create(${out_value}_tmp)"

   "char*":"std::string ${out_value}_tmp; ok &= luaval_to_std_string(tolua_S, ${arg_idx}, &${out_value}_tmp, \"${lua_namespaced_class_name}:${func_name}\"); ${out_value} = ${out_value}_tmp.c_str()"

   "Point":"ok &= luaval_to_point(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   "Vec2":"ok &= luaval_to_vec2(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   "Vec3":"ok &= luaval_to_vec3(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   "Vec4":"ok &= luaval_to_vec4(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   "Rect":"ok &= luaval_to_rect(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   "Size":"ok &= luaval_to_size(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   "Color4B":"ok &=luaval_to_color4b(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   "Color4F":"ok &=luaval_to_color4f(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   "Color3B":"ok &= luaval_to_color3b(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   "PhysicsMaterial":"ok &= luaval_to_physics_material(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   "Array*":"ok &= luaval_to_array(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   "Dictionary*":"ok &= luaval_to_dictionary(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   "AffineTransform":"ok &= luaval_to_affinetransform(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   "FontDefinition":  "ok &= luaval_to_fontdefinition(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   "@Vector<.*>":"ok &= luaval_to_ccvector(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   "@Map<std::basic_string.*>":"ok &= luaval_to_ccmap_string_key(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   "Value":"ok &= luaval_to_ccvalue(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   "ValueMap":"ok &= luaval_to_ccvaluemap(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   "ValueMapIntKey":"ok &= luaval_to_ccvaluemapintkey(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   "ValueVector":"ok &= luaval_to_ccvaluevector(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   "@vector<std::basic_string.*>":"ok &= luaval_to_std_vector_string(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   "@vector<int.*>":"ok &= luaval_to_std_vector_int(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   "kmMat4":"ok &= luaval_to_kmMat4(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   "Mat4":"ok &= luaval_to_mat4(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   "BlendFunc":"ok &= luaval_to_blendfunc(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   "_ttfConfig":"ok &= luaval_to_ttfconfig(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   "MeshVertexAttrib":"ok &= luaval_to_mesh_vertex_attrib(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   "@vector<float.*>":"ok &= luaval_to_std_vector_float(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   "@vector<unsigned short.*>":"ok &= luaval_to_std_vector_ushort(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   "AnimationInfo":"ok &= luaval_to_animationInfo(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

   "TexParams":"ok &= luaval_to_texparams(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"

 

 

   object:"ok &= luaval_to_object<${arg.to_string($generator).replace(\"*\", \"\")}>(tolua_S, ${arg_idx}, \"${scriptname}\",&${out_value})"

 

 

   "LUA_FUNCTION":"${out_value} = toluafix_ref_function(tolua_S, ${arg_idx}, 0); ok &= ${out_value} >= 0"

 

 

  from_native:

   # native to lua

   int:"tolua_pushnumber(tolua_S,(lua_Number)${in_value})"

完成之后你就可以写自己的类

#include "cocos2d.h"
#include "CCLuaEngine.h"


USING_NS_CC;
class MyClass:public cocos2d::Ref{
public:
    MyClass();
    MyClass();


    void test(LUA_FUNCTION nHandler);
}



然后编写ini文件 和genbindings.py文件， 运行导出后就可以在lua里面直接使用了。

cc.MyClass:test(function()


end)