第9月第13天 传递lua匿名函数到c/c++

1.

lua函数都在refid_fun

refid_fun[refid] = fun

TOLUA_API int toluafix_ref_function(lua_State* L, int lo, int def)
{
    // function at lo
    if (!lua_isfunction(L, lo)) return 0;

    s_function_ref_id++;

    lua_pushstring(L, TOLUA_REFID_FUNCTION_MAPPING);
    lua_rawget(L, LUA_REGISTRYINDEX);                           /* stack: fun ... refid_fun */
    lua_pushinteger(L, s_function_ref_id);                      /* stack: fun ... refid_fun refid */
    lua_pushvalue(L, lo);                                       /* stack: fun ... refid_fun refid fun */

    lua_rawset(L, -3);                  /* refid_fun[refid] = fun, stack: fun ... refid_ptr */
    lua_pop(L, 1);                                              /* stack: fun ... */

    return s_function_ref_id;

    // lua_pushvalue(L, lo);                                           /* stack: ... func */
    // return luaL_ref(L, LUA_REGISTRYINDEX);
}

static int tolua_Cocos2d_CCScriptEventDispatcher_addNodeEventListener00(lua_State* tolua_S)
{
#ifndef TOLUA_RELEASE
 tolua_Error tolua_err;
 if (
     !tolua_isusertype(tolua_S,1,"CCScriptEventDispatcher",0,&tolua_err) ||
     !tolua_isnumber(tolua_S,2,0,&tolua_err) ||
     (tolua_isvaluenil(tolua_S,3,&tolua_err) || !toluafix_isfunction(tolua_S,3,"LUA_FUNCTION",0,&tolua_err)) ||
     !tolua_isnumber(tolua_S,4,1,&tolua_err) ||
     !tolua_isnoobj(tolua_S,5,&tolua_err)
 )
  goto tolua_lerror;
 else
#endif
 {
  CCScriptEventDispatcher* self = (CCScriptEventDispatcher*)  tolua_tousertype(tolua_S,1,0);
  int event = ((int)  tolua_tonumber(tolua_S,2,0));
  LUA_FUNCTION listener = (  toluafix_ref_function(tolua_S,3,0));
  int tag = ((int)  tolua_tonumber(tolua_S,4,0));
#ifndef TOLUA_RELEASE
  if (!self) tolua_error(tolua_S,"invalid 'self' in function 'addScriptEventListener'", NULL);
#endif
  {
   int tolua_ret = (int)  self->addScriptEventListener(event,listener,tag);
   tolua_pushnumber(tolua_S,(lua_Number)tolua_ret);
  }
 }
 return 1;
#ifndef TOLUA_RELEASE
 tolua_lerror:
 tolua_error(tolua_S,"#ferror in function 'addNodeEventListener'.",&tolua_err);
 return 0;
#endif
}

比如；lua代码item:addNodeEventListener，CCScriptEventDispatcher* self===item,int event===cc.MENU_ITEM_CLICKED_EVENT,

LUA_FUNCTION listener =

function(tag)
     if sound then audio.playSound(sound) end
     listener(tag)
end

--[[--

创建一个文字标签菜单项，并返回 CCMenuItemLabel 对象。

可用参数：

-   listener: 回调函数
-   tag: 按钮的 Tag，会传入回调函数。多个按钮使用同一个回调函数时，可根据 Tag 区分哪一个按钮被按下（可选）
-   x, y: 坐标（可选）
-   sound: 按钮按下时播放什么音效（可选）

以及所有可以用于 ui.newTTFLabel() 的参数。

@param table params 参数表格对象

@return CCMenuItemLabel CCMenuItemLabel对象

]]

function ui.newTTFLabelMenuItem(params)
    local p = clone(params)
    p.x, p.y = nil, nil
    local label = ui.newTTFLabel(p)

    local listener = params.listener
    local tag      = params.tag
    local x        = params.x
    local y        = params.y
    local sound    = params.sound

    local item = CCMenuItemLabel:create(label)
    if item then
        if type(listener) == "function" then
            item:addNodeEventListener(cc.MENU_ITEM_CLICKED_EVENT, function(tag)
                if sound then audio.playSound(sound) end
                listener(tag)
            end)
        end
        if x and y then item:setPosition(x, y) end
        if tag then item:setTag(tag) end
    end

    return item
end

    self.item1 = ui.newTTFLabelMenuItem({text = "计时模式", size = 30, align = ui.TEXT_ALIGN_CENTER, 
        x = display.cx, y = display.cy + 40, color = display.COLOR_GREEN,
         listener = function()
             app:setData("currentLv", 1)
            app:enterScene("MainScene",1)
        end})

int CCLuaStack::executeFunctionByHandler(int nHandler, int numArgs)
{
    int ret = 0;
    if (pushFunctionByHandler(nHandler))                                /* L: ... arg1 arg2 ... func */
    {
        if (numArgs > 0)
        {
            lua_insert(m_state, -(numArgs + 1));                        /* L: ... func arg1 arg2 ... */
        }
        ret = executeFunction(numArgs);
    }
    return ret;
}

http://blog.csdn.net/linchaolong/article/details/37657077

http://www.cppblog.com/kevinlynx/archive/2011/04/24/144905.html

http://blog.csdn.net/rain_qingtian/article/details/48573981

http://blog.csdn.net/lightxm/article/details/38435067

http://www.cnblogs.com/boliu/p/4091274.html