游戏更新

local updata = class("updata",function()
                    return cc.Scene:create()
                end)
                local title
                function updata.create()
                    local scene = updata.new()
                    scene:addChild(scene:createLayer())
                    return scene
                end
                
                function updata:ctor()
                end
                
                function updata:createLayer()
                 local menuLayer = cc.Layer:create()
                
                    title = cc.MenuItemFont:create("title")
                    title:setPosition(480/2,280)
                    menuLayer:addChild(title)
                
                    function menuCall(tag)
                            updata:update()
                    end
                
                
                    local menuLabel2 = cc.Label:createWithTTF("Update", "font.ttf", 24)
                    local menuItem2 = cc.MenuItemLabel:create(menuLabel2)
                    menuItem2:registerScriptTapHandler(menuCall)
                    menuItem2:setPosition(480 /2,320/2)
                
                    local MainMenu = cc.Menu:create()
                    MainMenu:setPosition(0,0)
                    MainMenu:addChild(menuItem2)
                    menuLayer:addChild(MainMenu)
                
                    return menuLayer
                end
                
                function updata:getAssetsManager()
                
                    local function onError(errorCode)  --处理更新错误
                        if errorCode == cc.ASSETSMANAGER_NO_NEW_VERSION then
                            title:setString("no new version")
                        elseif errorCode == cc.ASSETSMANAGER_NETWORK then
                            title:setString("contect server error")
                        end
                    end
                
                    local function onProgress( percent )  --下载中回调
                        local progress = string.format("downloading %d%%",percent)
                        title:setString(progress)
                    end
                
                    local function onSuccess() --下载完成回调
                        title:setString("downloading ok")
                        --加载下载好的 testScene
                        local scene = require("testScene")
                        local gameScene = scene.create()
                        cc.Director:getInstance():replaceScene(gameScene)
                    end
                
                    --文件适配
                    local path
                    if cc.Application:getInstance():getTargetPlatform()==cc.PLATFORM_OS_WINDOWS then
                     path="..//..//"
                    end
                
                    if cc.Application:getInstance():getTargetPlatform()==cc.PLATFORM_OS_ANDROID then
                    path=""
                    end
                    local assetsManager = cc.AssetsManager:new("http://171.90.197.122/data.zip",--更新文件
                        "http://171.90.197.122/version",--版本检查
                        path)
                    assetsManager:deleteVersion()
                    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)
                
                
                    return assetsManager
                end
                
                function updata:update()
                    updata:getAssetsManager():update() --执行更新
                
                end
                
                return updata