（原创）cocos lua 热更新从零开始（一）最简单demo

cc.FileUtils:getInstance():setPopupNotify(false)
cc.FileUtils:getInstance():addSearchPath("src/")
cc.FileUtils:getInstance():addSearchPath("res/")

require "config"
require "cocos.init"

local function main()
    print("开始启动程序")

    --初始界面
    local _Director = cc.Director:getInstance()
    local _Wide = display.width
    local _Hight = display.height
    
    local scene = cc.Scene:create()
    if _Director:getRunningScene() then
        _Director:replaceScene(scene)
    else
        _Director:runWithScene(scene)
    end

    local spHelloWorld = cc.Sprite:create("HelloWorld.png")
    spHelloWorld:setPosition(_Wide / 2, _Hight / 2)
    spHelloWorld:addTo(scene,9)

    local text = cc.Label:createWithSystemFont("Hello World", "Arial", 40)
    text:move(display.cx, display.cy + 200)
    text:addTo(scene,9)

    --更新完成后的界面
    local function run()
        print("启动完成")

        local bg = cc.Sprite:create("Images/Tranquil_Lagoon.jpg")
        bg:setPosition(_Wide / 2, _Hight / 2)
        bg:addTo(scene)

        text:setString("Hello World  更新完成")

    end

    --热更新开始
    local writablePath = cc.FileUtils:getInstance():getWritablePath()
    local storagePath = writablePath .. "new_version"
    --将下载目录的src和res作为优先级最高的搜索目录，这样才能保证下载的能覆盖原来的代码
    cc.FileUtils:getInstance():addSearchPath(storagePath.."/src/",true)
    cc.FileUtils:getInstance():addSearchPath(storagePath.."/res/",true)

    print("下载路径："..storagePath)

    -- 创建AssetsManagerEx对象      --参数：本地project.manifest   下载保存路径
    local assetsManagerEx = cc.AssetsManagerEx:create("src/version/project.manifest", storagePath)
    assetsManagerEx:retain()


    -- 设置下载消息listener
    local function handleAssetsManagerEx(event)
        if (cc.EventAssetsManagerEx.EventCode.ALREADY_UP_TO_DATE == event:getEventCode()) then
            print("已经是最新版本了，进入游戏主界面")
            run()  
        end

        if (cc.EventAssetsManagerEx.EventCode.NEW_VERSION_FOUND == event:getEventCode()) then
            print("发现新版本，开始升级")
        end


        if (cc.EventAssetsManagerEx.EventCode.UPDATE_PROGRESSION == event:getEventCode()) then
            print("更新进度=" .. event:getPercent())
        end


        if (cc.EventAssetsManagerEx.EventCode.UPDATE_FINISHED == event:getEventCode()) then
            print("更新完毕，重新启动")
            run()
        end

        if (cc.EventAssetsManagerEx.EventCode.ERROR_NO_LOCAL_MANIFEST == event:getEventCode()) then
            print("发生错误:本地找不到manifest文件")
        end

        if (cc.EventAssetsManagerEx.EventCode.ERROR_DOWNLOAD_MANIFEST == event:getEventCode()) then
            print("发生错误:下载manifest文件失败")
        end

        if (cc.EventAssetsManagerEx.EventCode.ERROR_PARSE_MANIFEST == event:getEventCode()) then
            print("发生错误:解析manifest文件失败")
        end

        if (cc.EventAssetsManagerEx.EventCode.ERROR_UPDATING == event:getEventCode()) then
            print("发生错误:更新失败")
        end
    end

    --热更新事件
    local dispatcher = cc.Director:getInstance():getEventDispatcher()
    local eventListenerAssetsManagerEx = cc.EventListenerAssetsManagerEx:create(assetsManagerEx, handleAssetsManagerEx)
    dispatcher:addEventListenerWithFixedPriority(eventListenerAssetsManagerEx, 1)

    local localManifest = assetsManagerEx:getLocalManifest()
    print("当前版本："..localManifest:getVersion())

    -- 检查版本并升级
    assetsManagerEx:update()
end

local status, msg = xpcall(main, __G__TRACKBACK__)
if not status then
    print(msg)
end