cocos2d-lua屏幕截屏的方法，超好用，亲测可行

Cocos2d-x 前端之家
前端之家收集整理的这篇文章主要介绍了cocos2d-lua屏幕截屏的方法，超好用，亲测可行，前端之家小编觉得挺不错的，现在分享给大家，也给大家做个参考。

cocos2d-x lua系统自带截屏功能，使用方便。代码如下：

  1. local fileName = "printScreen.png"
  2.         -- 移除纹理缓存
  3.         cc.Director:getInstance():getTextureCache():removeTextureForKey(fileName)
  4.         self:removeChildByTag(1000)
  5.         -- 截屏
  6.         cc.utils:captureScreen(function(succeed,outputFile)
  7.             if succeed then
  8.               local winSize = cc.Director:getInstance():getWinSize()
  9.               local sp = cc.Sprite:create(outputFile)
  10.               self:addChild(sp,1000)
  11.               sp:setPosition(winSize.width / 2,winSize.height / 2)
  12.               sp:setScale(0.5) -- 显示缩放
  13.                 print(outputFile)
  14.             else
  15.                 cc.showTextTips("截屏失败")
  16.             end
  17.         end,fileName)


第二种方法，一帧之内进行截图并把纹理保存到本地的方法

关键代码

  1. function WeixinShareTips.createWeixinImageFile(bShareCurrentScene,func_next)
  2.  
  3.     local imgSize = cc.size(640,960)
  4.     local backGround = {
  5.         path = "weixin/background_twoDimension.jpg",pos = cc.p(imgSize.width / 2,imgSize.height / 2),scale = 1
  6.     }
  7.     local logo = {
  8.         path = cc.logos[cc.getSDKPlat()],pos = cc.p(503,848),scale = 0.51
  9.     }
  10.     local twoDimension = {
  11.         path = nil,pos = cc.p(532,106),scale = 1
  12.     }
  13.  
  14.     if bShareCurrentScene then
  15.         backGround = nil
  16.         logo.pos = cc.p(117,550)
  17.         twoDimension = nil
  18.         imgSize = cc.size(960,640)
  19.         logo.scale = 0.3
  20.     elseif cc.getSDKPlat() == "ios_yd" then
  21.         twoDimension.path = "weixin/twoDimension_bierangwomaoxian.jpg"
  22.     elseif cc.getSDKPlat() == "ios_yd2" then
  23.         twoDimension.path = "weixin/twoDimension_maoxianqishituan.jpg"
  24.     elseif cc.getSDKPlat() == "ios_yd3" then
  25.         twoDimension.path = "weixin/twoDimension_menghuanqishituan.jpg"
  26.     else
  27.         backGround.path = "weixin/background_noDimension.jpg"
  28.         twoDimension = nil
  29.     end
  30.  
  31.     local bigImagePath = WeixinShareTips.createWeixinImageFileWithlogoAndTwoDimension("bigWeixinShare.jpg",backGround,logo,twoDimension,imgSize)
  32.     local saveRet = bigImagePath ~= nil
  33.  
  34.     local function delayDoSomething(call_todo)
  35.         cc.Director : getInstance() : getRunningScene()  : runAction(cc.Sequence:create(
  36.         cc.DelayTime:create(0.1),cc.CallFunc:create(function ()
  37.             call_todo()
  38.         end)))
  39.     end
  40.  
  41.     delayDoSomething(function()
  42.         local imgScale = 1/8
  43.         imgSize = cc.size(imgSize.width * imgScale,imgSize.height * imgScale)
  44.         backGround = {
  45.             path = bigImagePath,scale = imgScale
  46.         }
  47.  
  48.         local smallImagePath = WeixinShareTips.createWeixinImageFileWithlogoAndTwoDimension("smallWeixinShare.jpg",nil,imgSize)
  49.         delayDoSomething(function()
  50.             saveRet = saveRet and (smallImagePath ~= nil)
  51.             func_next(saveRet,smallImagePath,bigImagePath)
  52.         end)
  53.     end)
  54. end
  55.  
  56. function WeixinShareTips.createWeixinImageFileWithlogoAndTwoDimension(toFileName,imgSize)
  57.  
  58.     local function createRenderNodeWithPathPos(pathPos)
  59.         local sprite = nil
  60.         if pathPos then
  61.             sprite = cc.Sprite:create(pathPos.path)
  62.             sprite : setPosition(pathPos.pos)
  63.             sprite : setScale(pathPos.scale)
  64.         end
  65.         return sprite
  66.     end
  67.  
  68.     local function createRenderTextureWithNodes(logoRenderNode,twoDimensionNode,backGroundNode)
  69.           -- body
  70.         local renderTexture = cc.RenderTexture:create(imgSize.width,imgSize.height)
  71.  
  72.         renderTexture : beginWithClear(0,0)
  73.  
  74.         if backGroundNode and (cc.Director:getInstance():getRunningScene() ~= backGroundNode) then
  75.             backGroundNode : getTexture() : setTexParameters(cc.GL_LINEAR,cc.GL_LINEAR,cc.GL_CLAMP_TO_EDGE,cc.GL_CLAMP_TO_EDGE)
  76.         end
  77.  
  78.         if backGroundNode then
  79.             backGroundNode : visit()
  80.         end
  81.        
  82.  
  83.         if logoRenderNode then
  84.             logoRenderNode : visit()
  85.         end
  86.  
  87.         if twoDimensionNode then
  88.             twoDimensionNode : visit()
  89.         end
  90.  
  91.         renderTexture : endToLua()
  92.         return renderTexture
  93.     end
  94.  
  95.     local function createImageFileWithRenderTexture(renderTexture)
  96.         local saveRet = renderTexture : saveToFile(toFileName,cc.IMAGE_FORMAT_JPEG,false)
  97.         cc.Director : getInstance() : getTextureCache() : removeTextureForKey(
  98.             cc.FileUtils:getInstance():getWritablePath() .. toFileName)
  99.         if saveRet then
  100.            return cc.FileUtils:getInstance():getWritablePath() .. toFileName
  101.         else
  102.             cc.showTextTips("保存图片失败")
  103.             return nil
  104.         end
  105.     end
  106.  
  107.     local logoNode =  createRenderNodeWithPathPos(logo)
  108.     local twoDimensionNode = createRenderNodeWithPathPos(twoDimension)
  109.     local backGroundNode = createRenderNodeWithPathPos(backGround)
  110.     if not backGroundNode then
  111.         backGroundNode = cc.Director:getInstance():getRunningScene()
  112.     end
  113.     
  114.     local renderTexture = createRenderTextureWithNodes(logoNode,backGroundNode)
  115.     return createImageFileWithRenderTexture(renderTexture)
  116. end

用法代码如下：（WeixinShareTips.lua） 
  1. local WeixinShareTips = class("WeixinShareTips",cc.Node)
  2. local EventTips = import(".EventTips")
  3. local NoticeLayer = import(".NoticeLayer")
  4. local EvaluateLayer = import(".EvaluateLayer")
  5. local GuideLayer = import(".GuideLayer")
  6.  
  7. WeixinShareTips.RESOURCE_FILENAME = "WeixinShareTips.csb"
  8.  
  9. --一些变量
  10. local lsl = LuaSerialize:getInstance()
  11. local this = nil
  12.  
  13. function WeixinShareTips : ctor()
  14.     self.root = cc.CSLoader:createNode(WeixinShareTips.RESOURCE_FILENAME)
  15.     self:addChild(self.root)
  16.     self:enableNodeEvents()
  17.     this = self
  18. end
  19.  
  20. function WeixinShareTips : getResourceNode()
  21.     return self.root
  22. end
  23.  
  24. function WeixinShareTips.getShareRewardFromServer()
  25.     print("SHARE_SUCCESS")
  26.       --请求数据
  27.     lsl:clear()
  28.     lsl:writeShort(111)
  29.     lsl:writeBytes(cc.userSid,8)
  30.     local data = lsl:getBytes()
  31.     cc.sendReq(cc.gameServer,data,function (msg,sc,rc)
  32.             if sc == 0 and rc == 0 then
  33.                 cc.showTextTips("分享成功，请在邮件中查收奖品")
  34.             elseif rc == 109 then
  35.                 print("今日已领取奖励")
  36.             else
  37.                 cc.showTextTips("sc:" .. sc .. " rc:" .. rc)
  38.             end
  39.         end)
  40. end
  41.  
  42. function WeixinShareTips.startShareWithNodeAndshareCurrentSece(dstNode,isShareCurrentScene)
  43.     local WeixinTips = WeixinShareTips : create()
  44.     dstNode : addChild(WeixinTips)
  45.     WeixinShareTips.isShareCurrentScene = isShareCurrentScene
  46. end
  47.  
  48. function WeixinShareTips : onEnter()
  49.     --按钮事件
  50.       --mask
  51.     self : getResourceNode() : getChildByName("pnl_mask") : addClickEventListener(
  52.     function ()
  53.         cc.gameSound:playClickSound()
  54.         self : removeFromParent()
  55.     end)
  56.  
  57.  
  58.     self : getResourceNode() : getChildByName("btn_shareAll") : addClickEventListener(
  59.     function ()
  60.         cc.gameSound:playClickSound()
  61.         self : removeFromParent()
  62.         
  63.         WeixinShareTips.createWeixinImageFile(WeixinShareTips.isShareCurrentScene,function(success,bigImagePath)
  64.             if success then
  65.                 WeixinShareTips.sendWeixinImage(cc.const.TOALLFRIENDS,bigImagePath)
  66.             end
  67.         end)
  68.     end)
  69.  
  70.     self : getResourceNode() : getChildByName("btn_shareFriend") : addClickEventListener(
  71.     function ()
  72.         cc.gameSound:playClickSound()
  73.         self : removeFromParent()
  74.         WeixinShareTips.createWeixinImageFile(WeixinShareTips.isShareCurrentScene,bigImagePath)
  75.             if success then
  76.                 WeixinShareTips.sendWeixinImage(cc.const.TOFRIEND,bigImagePath)
  77.             end
  78.         end)
  79.     end)
  80.  
  81.     self : initUI()
  82. end
  83.  
  84.  
  85. --重置UI
  86. function WeixinShareTips : initUI()
  87.     local pnl_smallItem = self.root : getChildByName("pnl_smallItem")
  88.     local pnl_hero = self.root : getChildByName("pnl_hero")
  89.     local itemInterval = 82
  90.     local heroInterval = 110
  91.  
  92.     local rewards = cc.parseCombainCfg(cc.csvData["global"]["wxShareRewardShow"])
  93.     local node = self : createRewardNode(pnl_smallItem,pnl_hero,itemInterval,heroInterval,rewards)
  94.     self.root : getChildByName("pnl_posTop") : addChild(node)
  95.  
  96.     rewards = cc.parseCombainCfg(cc.csvData["global"]["wxShareFirstRewardShow"])
  97.     node = self : createRewardNode(pnl_smallItem,rewards)
  98.     self.root : getChildByName("pnl_posDown") : addChild(node)
  99. end
  100.  
  101. --创建奖励，pnl_smallItem: 小项的panle,pnl_hero：英雄背景,itemInterval:列间距,heroInterval英雄间距,rewards:奖励
  102. function WeixinShareTips : createRewardNode(pnl_smallItem,rewards)
  103.  
  104.     --创建角色等待动画
  105.    local function createARoleWithShadow(name,qlty,scale)
  106.         local node = ccui.Widget : create()
  107.         local anim = cc.createRoleAnim(name,qlty == "6")
  108.         anim:setName("anim")
  109.         anim:getAnimation():play("wait",-1,1)
  110.         anim:setScale(scale)
  111.         node:addChild(anim)
  112.         anim:setPosition(45,13)
  113.         node : setContentSize(cc.size(100,100))
  114.         return node
  115.     end
  116.  
  117.     local function func_showHero(sender)
  118.           -- body
  119.         local heroCode = tostring(sender : getTag())
  120.         local hero = cc.csvData["heros"][heroCode]
  121.         EventTips.getInstance():showTips(this)
  122.         hero.new = false
  123.  
  124.         hero.hit = 0       --命中
  125.         hero.crit = 0      --暴击
  126.         hero.def = 0       --防御
  127.         hero.dodge = 0     --闪避 
  128.         hero.ethos = 0     --王者
  129.         hero.speed = 0    --速度
  130.  
  131.         EventTips.getInstance():showHero(hero,true)
  132.     end
  133.  
  134.     local function setHeroPanelInfoWithCode(panel,heroCode)
  135.         local qlty = cc.csvData["heros"][heroCode]["qlty"]
  136.         local anim = createARoleWithShadow(cc.csvData["heros"][heroCode]["appearance"],0.35)
  137.         anim : setPosition(cc.p(47,45))
  138.  
  139.         panel : setVisible(true)
  140.         panel : getChildByName("img_anim") : removeChildByTag(1024)
  141.         panel : getChildByName("img_anim") : addChild(anim)
  142.         anim : setTag(1024)
  143.         panel : getChildByName("img_anim") : setTag(heroCode)
  144.         panel : getChildByName("img_anim") : loadTexture("icon/ui_ctn_layer_Box0" .. qlty ..".png")
  145.         panel : getChildByName("img_anim") : addClickEventListener(func_showHero)
  146.     end
  147.  
  148.     local function func_showItemTips(sender,touchType)
  149.         local code = tostring(sender : getTag())
  150.  
  151.         if touchType == cc.const.TOUCH_EVENT_BEGAN then
  152.             local img_BoxSize = sender : getContentSize()
  153.             --began
  154.             cc.gameSureTips:showItemTips(
  155.                 sender,code,cc.p(img_BoxSize.width / 2,img_BoxSize.height + 6)
  156.             )
  157.         elseif touchType == 1 then
  158.             --moved
  159.         else
  160.             --ended or canceled
  161.             local tips = sender : getChildByName("showItemTips")
  162.             if tips then
  163.                 tips.close()
  164.             end
  165.         end
  166.     end
  167.  
  168.     local function setItemInfoWithReward(pnl_item,reward,img_BoxName)
  169.         local img_Box = pnl_item : getChildByName("img_Box")
  170.         img_Box : setName(img_BoxName)
  171.         img_Box : loadTexture(cc.getResIconName(reward.aType)) --icon
  172.         img_Box : setTouchEnabled(true)
  173.  
  174.         --数值类型
  175.         if reward.code == "0" then
  176.             reward.code = tostring(900000 + tonumber(reward.aType))
  177.         end
  178.  
  179.         img_Box:loadTexture("icon/ui_icon_Box"..cc.csvData["items"][reward.code]["qlty"]..".png")
  180.         img_Box:getChildByName("img_icon")
  181.             :loadTexture("icon/"..cc.csvData["items"][reward.code]["icon"]..".png")
  182.         img_Box:getChildByName("txt_count"):setString(reward.count)
  183.  
  184.         img_Box : addTouchEventListener(func_showItemTips)
  185.         img_Box : setTag(reward.code)
  186.         img_Box : setSwallowTouches(false)
  187.     end
  188.  
  189.     local startPos = cc.p(0,0) --起点位置
  190.     local node = ccui.Widget : create()
  191.  
  192.     for i = 1,#rewards,1 do
  193.         local isHero = (rewards[i][1] == "100") --是否为英雄
  194.  
  195.         if isHero then
  196.             --创建角色
  197.             local pnl_isHero = pnl_hero : clone()
  198.             node : addChild(pnl_isHero)
  199.             pnl_isHero : setPosition(startPos)
  200.             local heroCode = rewards[i][2]
  201.             setHeroPanelInfoWithCode(pnl_isHero,heroCode)
  202.             startPos.x = startPos.x + heroInterval
  203.         else
  204.             local pnl_item = pnl_smallItem : clone()
  205.             pnl_item : setVisible(true)
  206.             node : addChild(pnl_item)
  207.  
  208.             local reward = {
  209.                 aType = rewards[i][1],code = rewards[i][2],count = rewards[i][3]
  210.             }
  211.             setItemInfoWithReward(pnl_item,"img_Box_" .. i)
  212.             pnl_item : setPosition(startPos)
  213.             startPos.x = startPos.x + itemInterval
  214.         end
  215.  
  216.     end
  217.  
  218.     return node
  219. end
  220.  
  221.  
  222. function WeixinShareTips : onExit()
  223.     self : removeAllChildren()
  224. end
  225.  
  226. function WeixinShareTips.addShareButtonTo(dstNode)
  227.  
  228.     local function func_btnShare()
  229.        WeixinShareTips.startShareWithNodeAndshareCurrentSece(dstNode,true)
  230.     end
  231.  
  232.     local shareOpen = not(cc.weixinID == nil or  cc.weixOpen == nil or cc.weixOpen == "0")
  233.     if not shareOpen then
  234.         return nil
  235.     else
  236.         dstNode : removeChildByName("weixinShareButton")
  237.  
  238.         local btn = ccui.Button : create()
  239.         dstNode : addChild(btn)
  240.  
  241.         btn : setName("weixinShareButton")
  242.         btn : loadTextures("weixin/ui_btn_share_normal.png","weixin/ui_btn_share_selected.png","")
  243.         btn : setLocalZOrder(12345)
  244.         btn : setPosition(cc.p(898,54))
  245.  
  246.         btn : setTouchEnabled(true)
  247.         btn : addClickEventListener(func_btnShare)
  248.  
  249.         return btn
  250.     end
  251. end
  252.  
  253.  
  254. --mode:0发给朋友,1发到朋友圈,smallPng:小图片,bigPng:大图
  255. function WeixinShareTips.sendWeixinImage(mode,smallPng,bigPng)
  256.     -- body
  257.     -- local mode = "1"
  258.     -- local smallPng = "test.png"
  259.     -- local bigPng = "testBig.png"
  260.     local info = "8;" .. mode .. ";" ..smallPng .. ";" ..bigPng .. ";" .. cc.weixinID 
  261.     cc.dataEye(info) 
  262. end
  263.  
  264. --mode:0发给朋友,Png:图片
  265. function WeixinShareTips.sendWeixinURL(mode,png,title,desc,url)
  266.     -- body
  267.     --  local mode = "1"
  268.     -- local png = "test.png"
  269.     -- local title = "TITLE-------TITLE"
  270.     -- local desc = "DESC--------DESC"
  271.     -- local url = "http://www.baidu.com"
  272.     -- local mode = "1"
  273.     local info = "9;" .. png .. ";" ..title .. ";" ..desc .. ";" .. url .. ";" .. mode .. ";" ..cc.weixinID
  274.     cc.dataEye(info) 
  275. end
  276.  
  277. function WeixinShareTips.createWeixinImageFile(bShareCurrentScene,backGroundNode)
  278.     return createImageFileWithRenderTexture(renderTexture)
  279. end
  280.  
  281. return WeixinShareTips

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