function  GameScene:loading()

    local layer = cc.Layer:create()

    layer:setName("loadinglayer")
    
    local bg = cc.Sprite:create("bg2.jpg")
    bg:setPosition( self.visibleSize.width / 2 ,  self.visibleSize.height / 2)
    bg:setScale(self.visibleSize.width/183,self.visibleSize.height/257)
    layer:addChild(bg)
    
    
    local loading = cc.Sprite:create("loading.png")
    loading:setPosition( self.visibleSize.width / 2 ,  self.visibleSize.height / 2+50)
   -- loading:setScale(self.visibleSize.width/183,self.visibleSize.height/257)
    layer:addChild(loading)

    loading:setName("loading")
    loading:runAction(cc.RepeatForever:create(cc.RotateBy:create(2, 90)))

 
    return layer  
end 

function GameScene:removeLoading(iScene)
    local  layerLoading=iScene:getChildByName("loadinglayer")
    local layerbyName = layerLoading:getChildByName("loading") 
    layerbyName:removeFromParent()
end

使用方法

local function main()
    collectgarbage("collect")
    collectgarbage("setpause", 100)
    collectgarbage("setstepmul", 5000)
    local director = cc.Director:getInstance()
    director:setAnimationInterval(1.0 / 60)
    cc.Director:getInstance():getOpenGLView():setDesignResolutionSize(480, 320, 0)
    local scene = require("GameScene")
    local gameScene = scene.create()
    if cc.Director:getInstance():getRunningScene() then
       cc.Director:getInstance():replaceScene(gameScene)
        gameScene:readimages(gameScene)
        gameScene:removeLoading(gameScene)
   end
end

範例程式在
Tutorial_Sprite_getChildByName_remoFromParent