cocos2dx lua 热更新

发布时间：2020-12-14 16:44:53 所属栏目：百科来源：网络整理

导读：最近研究cocos2dx + lua 实现游戏的热更新。基本原理：比如我有一个GameScene，显示"hello world",现在热更新，更新之后显示"hello SB".如果是用c++来开发，那么只用把它作成lib库，更新时替换lib库。用lua的话，更简单，替换相关的lua就可以了。 GameScene.

最近研究cocos2dx + lua 实现游戏的热更新。基本原理：比如我有一个GameScene，显示"hello world",现在热更新，更新之后显示"hello SB".如果是用c++来开发，那么只用把它作成lib库，更新时替换lib库。用lua的话，更简单，替换相关的lua就可以了。

GameScene.lua

[cpp] 
    view plain 
    copy 
     
    
 require"Cocos2d"
 require"Cocos2dConstants"
 
 localGameScene=class("GameScene",function()
 returncc.Scene:create()
 end)
 functionGameScene.create()
 localscene=GameScene.new()
 scene:addChild(scene:createTitle())
returnscene
 end
 
 functionGameScene:ctor()
 self.visibleSize=cc.Director:getInstance():getVisibleSize()
 self.origin=cc.Director:getInstance():getVisibleOrigin()
 self.schedulerID=nil
 end
 functionGameScene:createTitle()
 localtitle=cc.Label:createWithTTF("HelloWorld","fonts/arial.ttf",24)
 title:setPosition(self.visibleSize.width/2,self.visibleSize.height/2)
returntitle
 end

更新的 GameScene.lua

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localtitle=cc.Label:createWithTTF("HelloSB",248)"> end

最关键的更新模块，MenuScene.lua

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localMenuScene=class("MenuScene",248)"> localtitle

functionMenuScene.create()

localscene=MenuScene. scene:addChild(scene:createLayer())

--scene:addChild(scene:createLayerFarm())

--scene:addChild(scene:createLayerMenu())

functionMenuScene:ctor()

self.visibleSize=cc.Director:getInstance():getVisibleSize()

self.origin=cc.Director:getInstance():getVisibleOrigin()

self.schedulerID=nil

functionMenuScene:createLayer()

functionmenuCallback1(tag)

localscene=require("GameScene")

localgameScene=scene.create()

cc.Director:getInstance():replaceScene(gameScene)

functionmenuCallback2(tag)

MenuScene:update()

localmenuLayer=cc.Layer:create()

title=cc.Label:createWithTTF("ChooseScene",24)

title:setPosition(self.visibleSize.width/2,self.visibleSize.height/4*3)

menuLayer:addChild(title)

localmenuLabel1=cc.Label:createWithTTF("GotoScene",248)"> localmenuItem1=cc.MenuItemLabel:create(menuLabel1)

menuItem1:registerScriptTapHandler(menuCallback1)

menuItem1:setPosition(self.visibleSize.width/2,self.visibleSize.height/4*2)

localmenuLabel2=cc.Label:createWithTTF("Update",248)"> localmenuItem2=cc.MenuItemLabel:create(menuLabel2)

menuItem2:registerScriptTapHandler(menuCallback2)

menuItem2:setPosition(self.visibleSize.width/2,self.visibleSize.height/4*1)

localMainMenu=cc.Menu:create()

MainMenu:setPosition(0,0)

MainMenu:addChild(menuItem1)

MainMenu:addChild(menuItem2)

menuLayer:addChild(MainMenu)

returnmenuLayer

functionMenuScene:getAssetsManager()

localfunctiononError(errorCode)

iferrorCode==cc.ASSETSMANAGER_NO_NEW_VERSIONthen

title:setString("nonewversion")

elseiferrorCode==cc.ASSETSMANAGER_NETWORKthen

title:setString("networkerror")

localfunctiononProgress(percent)

localprogress=string.format("downloading%d%%",percent)

title:setString(progress)

localfunctiononSuccess()

title:setString("downloadingok")

localpathToSave=""

pathToSave=createDownloadDir()

localassetsManager=cc.AssetsManager:new("http://qd.baidupcs.com/file/1a531cc6565d95827e0ec3f9fd4af795?fid=138463011-250528-222085911919595&time=1406097600&sign=FDTAXER-DCb740ccc5511e5e8fedcff06b081203-mLvWIkhwaVZCjN%2BpTYZJZ%2BagPR4%3D&to=qb&fm=N,B,T,t&newver=1&expires=1406098200&rt=sh&r=164813188&mlogid=124796854&sh=1&vuk=138463011&vbdid=2986594979&fn=GameScene.zip",

"https://raw.github.com/samuele3hu/AssetsManagerTest/master/version",

pathToSave)

assetsManager:retain()

assetsManager:setDelegate(onError,cc.ASSETSMANAGER_PROTOCOL_ERROR)

assetsManager:setDelegate(onProgress,cc.ASSETSMANAGER_PROTOCOL_PROGRESS)

assetsManager:setDelegate(onSuccess,cc.ASSETSMANAGER_PROTOCOL_SUCCESS)

assetsManager:setConnectionTimeout(3)

returnassetsManager

functionMenuScene:update()

MenuScene:getAssetsManager():update()

returnMenuScene

关键看cc.AssertsMananger。cpp在extensionsassets-manager。

AssetsManager传三个参数，resource.zip路径，version路径，写文件的路径。

然后调用AssetsManager.update,进行下载更新。

注意的是，android时，它是写到Context.getCacheDir()里。所以每次进入游戏时，都会重新更新。需要修改 createDownloadDir()里创建的路径，把它写到sd卡上。

（编辑：李大同）

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