unityとxluaの第3歩はどのようにluaの中でリスニング事件を実現します

--EventManager.lua     Assets/GameRes/Lua/
local EventManager = {}

local listenerTable = { }

--             
EventManager.AddListener = function(eventType, listener,target)
    --      v     （nil   false），      error；   ，       。
    --assert (v [, message])
    assert(eventType,'eventType is nil!')
    local t = listenerTable[eventType]
    if not t then
        t = {}
        listenerTable[eventType] = t
    end
    --                 
    t[#t + 1] = {listener = listener , target = target}   
end

--    
EventManager.TriggerListener = function(eventType,arg)
    --pcall         f。            ，      ，   ，     
    --       
    local ok,errors= pcall(function()
        
        assert(eventType,'eventType is nil!')
        local t = listenerTable[eventType]
        if t then
            for i = #t,1,-1 do  --          
                if t[i] then
                    if t[i].target == nil then
                        t[i].listener(arg)
                    else
                        t[i].listener(t[i].target,arg)  --          
                    end
                end
            end
        end
    
    end)

    if not ok then 
        local errorMessage = "error on troggerListener , type is "..eventType.."
"..errors
        CS.UnityEngine.Debug.LogError(errorMessage)
    end
end

EventManager.RemoveListener = function (eventType,listener,target)
    assert(eventType,"eventType is nil!")
    local t = listenerTable[eventType]
    if t then
        if target then
            for i = 1,#t do
                if t[i].target == target and t[i].listener == listener then
                    table.remove(t,i)
                    break
                end
            end
            return
        end
        for i = 1,#t do
            if  t[i].listener == listener then
                table.remove(t,i)
                break
            end
        end

    end

end

return EventManager

--EventType.lua      Assets/GameRes/Lua/
local EventType = {}

EventType.Test = 1
EventType.CreateUI = 2

return EventType

--main.lua
local EventManager = require "EventManager"
local EventType = require "EventType"

function Awake()
    print("Lua Awake")
    EventManager.AddListener(EventType.Test,function(arg) print("Test"..tostring(arg))  end)
end

function Start()
    print("Lua Start")
    EventManager.TriggerListener(EventType.Test,"6666")
end


--     
function Update()
    --print("Lua Update")
end

function OnDestroy()
    print("Lua OnDestory")
end

function SceneLoaded(name)
    print("Lua SceneLoaded "..name)
    
end

function SceneUnloaded(name)
    print("Lua SceneUnloaded  "..name)
end

function OnApplicationFocus(focus)
    print("Lua OnApplicationFocus "..tostring(focus))
end

function OnApplicationPause(pause)
    print("Lua OnApplicationPause "..tostring(pause))
end

function OnApplicationQuit()
    print("Lua OnApplicationQuit ")
end