//跪求求解释
–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
function MainScene:update(p_fun)
local writablePath = cc.FileUtils:getInstance():getWritablePath()
local storagePath = writablePath … “new_version”
cc.FileUtils:getInstance():addSearchPath(storagePath.."/src/",true)
cc.FileUtils:getInstance():addSearchPath(storagePath.."/res/",true)
--------------------------------
local srcPath = storagePath.. '/src/'
local resPath = storagePath.. '/res/'
if not (cc.FileUtils:getInstance():isDirectoryExist(storagePath)) then
cc.FileUtils:getInstance():createDirectory(storagePath)
cc.FileUtils:getInstance():createDirectory(resPath)
cc.FileUtils:getInstance():createDirectory(srcPath)
end
--------------------------------
-- 创建AssetsManagerEx对象
local assetsManagerEx = cc.AssetsManagerEx:create("version/project.manifest", storagePath)
assetsManagerEx:retain()
-- 设置下载消息listener
local localManifest = assetsManagerEx:getLocalManifest()
local Version=localManifest:getVersion()
local searchPaths = cc.FileUtils:getInstance():getSearchPaths()
table.insert(searchPaths, 1, storagePath)
table.insert(searchPaths, 2, resPath)
table.insert(searchPaths, 3, srcPath)
cc.FileUtils:getInstance():setSearchPaths(searchPaths)
p_fun(Version)
if Version~='' then
--return ;
end
local function handleAssetsManagerEx(event)
if (cc.EventAssetsManagerEx.EventCode.ALREADY_UP_TO_DATE == event:getEventCode()) then
local str="已经是最新版本了，进入游戏主界面"
print(str)
p_fun(str)
--app:enterScene("GameScene")
end
if (cc.EventAssetsManagerEx.EventCode.NEW_VERSION_FOUND == event:getEventCode()) then
local str="发现新版本，开始升级"
print(str)
p_fun(str)
end
if (cc.EventAssetsManagerEx.EventCode.UPDATE_PROGRESSION == event:getEventCode()) then
local upnum=event:getPercent()--当前进度
local ByFile=event:getPercentByFile()--总进度
local num=Global:Int(ByFile)
local str="更新进度="..num.."%"
print(str)
p_fun(str,num)
end
if (cc.EventAssetsManagerEx.EventCode.UPDATE_FINISHED == event:getEventCode()) then
--app:run()
--cc.game.restart()
local str="更新完毕，请重新启动"
print(str)
p_fun(str)
end
if (cc.EventAssetsManagerEx.EventCode.ERROR_NO_LOCAL_MANIFEST == event:getEventCode()) then
local str="发生错误:本地找不到manifest文件"
print(str)
p_fun(str)
end
if (cc.EventAssetsManagerEx.EventCode.ERROR_DOWNLOAD_MANIFEST == event:getEventCode()) then
local str="发生错误:下载manifest文件失败"
print(str)
p_fun(str)
end
if (cc.EventAssetsManagerEx.EventCode.ERROR_PARSE_MANIFEST == event:getEventCode()) then
local str="发生错误:解析manifest文件失败"
print(str)
p_fun(str)
end
if (cc.EventAssetsManagerEx.EventCode.ERROR_UPDATING == event:getEventCode()) then
local str="发生错误:更新失败"
print(str)
p_fun(str)
end
end
local dispatcher = cc.Director:getInstance():getEventDispatcher()
local eventListenerAssetsManagerEx = cc.EventListenerAssetsManagerEx:create(assetsManagerEx, handleAssetsManagerEx)
dispatcher:addEventListenerWithFixedPriority(eventListenerAssetsManagerEx, 1)
p_fun('检查版本并升级')
assetsManagerEx:update()
end