ScrollView模拟上拉刷新

概述本篇介绍ScrollView实现上拉刷新的功能，也可以实现下拉刷新。 数据来自Data.json文件 首先显示3条数据，在ScrollView滚动到底部回d时再显示新数据。 local MainScene = class("MainScene", cc.load("mvc").ViewBase)function MainScene:ctor() self:enableNodeEvent

本篇介绍ScrollVIEw实现上拉刷新的功能，也可以实现下拉刷新。

数据来自Data.Json文件

首先显示3条数据，在ScrollVIEw滚动到底部回d时再显示新数据。

local MainScene = class("MainScene",cc.load("mvc").VIEwBase)function MainScene:ctor()    self:enableNodeEvents()    self.localData = {}    self.index = 0endfunction MainScene:onEnter()    self:createUI()endfunction MainScene:createUI()    local path = "res/Data.Json"    if cc.fileUtils:getInstance():isfileExist(path) then        local fs = cc.fileUtils:getInstance():getStringFromfile(path)        local t = Json.decode(fs)        for i = 1,#t.data do            table.insert(self.localData,t.data[i])        end        self.index = self.index + #self.localData    end    self:setScroll()endfunction MainScene:setScroll()    self.hT = {}    local h = 40 + (#self.localData-1) * 20    self.sv = ccui.ScrollVIEw:create()    self.sv:setContentSize(600,560)    self.sv:setBounceEnabled(true)    self.sv:setDirection(ccui.ScrollVIEwDir.vertical)    self.sv:setClipPingEnabled(true)    self.sv:setAnchorPoint(0,0)    self.sv:setposition(180,50)    self:addChild(self.sv)    local total = 0    if self.index > 3 then        total = 3    else        total = self.index    end    self.index = self.index - total    for i=1,total do        local label = self.getWhiteLabel(self.localData[i],20,{wIDth = 600,height = 0},cc.TEXT_AlignmENT_left,cc.VERTICAL_TEXT_AlignmENT_CENTER)        if i%2 == 0 then            label:setTextcolor(cc.c4f(0,186,255,255))        end        h = h + label:getContentSize().height        table.insert(self.hT,h-40-(#self.localData-1) * 20)        self.sv:addChild(label)    end     self.sv:setInnerContainerSize(cc.size(self.sv:getContentSize().wIDth,h))    local chs = self.sv:getChildren()    for i=1,#chs do        local label = chs[i]        label:setAnchorPoint(0,0)        local y = h - 20 - self.hT[i] - (i-1) * 20        label:setposition(0,y)    end    self.sv:addEventListener(function(sender,event)        if event == ccui.ScrollvIEwEventType.bounceBottom then            if self.index > 0 then                self:showMessage("Loading........")                self:beginLoad(total)            else                self:showMessage("no more message")            end         end    end)endfunction MainScene:showMessage(str)    local label = self.getRedLabel(str,28)    local size = cc.Director:getInstance():getWinSize()    self:addChild(label)    label:setposition(size.wIDth/2,size.height/2)    local moveto = cc.Moveto:create(3,cc.p(size.wIDth/2,size.height*1.2))    label:runAction(cc.Sequence:create(moveto,cc.RemoveSelf:create()))endfunction MainScene:beginLoad(total)    local h = self.sv:getInnerContainerSize().height    for i = 1,self.index do        local label = self.getWhiteLabel(self.localData[total+i],cc.VERTICAL_TEXT_AlignmENT_CENTER)        if (total+i)%2 == 0 then            label:setTextcolor(cc.c4f(0,h-40-(#self.localData-1) * 20)        self.sv:addChild(label)    end    self.sv:setInnerContainerSize(cc.size(self.sv:getContentSize().wIDth,h))    self:reloadData()endfunction MainScene:reloadData()    local chs = self.sv:getChildren()    local h = self.sv:getInnerContainerSize().height    for i=1,y)    end    self:finishLoad()endfunction MainScene:finishLoad()    self.sv:scrolltopercentVertical(80,0.5,true)    self.index = 0endfunction MainScene.getWhiteLabel(text,FontSize,dimensions,hAlignment,vAlignment,mb)    return MainScene.getTextLabel(text,FontSize,cc.c4f(255,255),dimensions,hAlignment,vAlignment,mb)endfunction MainScene.getBlueLabel(text,Fontsize,Fontsize,cc.c4f(0,mb)endfunction MainScene.getRedLabel(text,0,84,mb)endfunction MainScene.getTextLabel(text,color,mb)    local ttfConfig = {}    ttfConfig.FontfilePath = "res/Fonts/DFYUANW7-GB2312.ttf"    ttfConfig.FontSize     = Fontsize    ttfConfig.glyphs       = cc.GLYPHColLECTION_DYNAMIC    ttfConfig.customGlyphs = true    ttfConfig.distanceFIEldEnabled = false     local textLabel = cc.Label:createWithTTF(ttfConfig,text)    textLabel:setlineBreakWithoutSpace(true)     if color then textLabel:setTextcolor(color) end     if dimensions then textLabel:setDimensions(dimensions.wIDth,dimensions.height) end    if hAlignment then textLabel:setAlignment(hAlignment) end    if vAlignment then textLabel:setVerticalAlignment(vAlignment) end    -- 描边    if not mb then textLabel:enableOutline(cc.c4b(0,2) end    return textLabel endreturn MainScene

运行效果：

总结

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