Lua闭包

Lua中的闭包函数，如果想在外面调用，必须在闭包的母函数执行后才能正常调用，否则改函数引用为空

_G.UIFather = {}

function UIFather:New(prefab)
    local t = { ["prefab"] = prefab }
    setmetatable(t, self)
    self.__index = self
    return t
end

function UIFather:RegisterCloseEvent(instance, func, ...)
	function UIFather:OnEvent(event,param)

	end
end

function UIFather:OnEnable(instance)
	
end

function UIFather:OnDisable(instance)
	
end


_G.A = _G.UIFather:New()

print("母函数调用之前" ,A["OnEnable"], A["OnEvent"],UIFather["OnEvent"])

UIFather:RegisterCloseEvent()

print("母函数调用之后" ,A["OnEnable"], A["OnEvent"],UIFather["OnEvent"])

调用结果为：

母函数调用之前	function: 0054CDF0	nil	nil
母函数调用之后	function: 0054CDF0	function: 0054CE70	function: 0054CE70
[Finished in 0.1s]