Lua閉包

Lua中的閉包函數，如果想在外面調用，必須在閉包的母函數執行後才能正常調用，否則改函數引用爲空

_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("母函數調用之前" ,A["OnEnable"], A["OnEvent"],UIFather["OnEvent"])

UIFather:RegisterCloseEvent()

print("母函數調用之後" ,A["OnEnable"], A["OnEvent"],UIFather["OnEvent"])

調用結果爲：

母函數調用之前	function: 0054CDF0	nil	nil
母函數調用之後	function: 0054CDF0	function: 0054CE70	function: 0054CE70
[Finished in 0.1s]