local BaseLoading=class("BaseLoading",function()
    return cc.Layer:create()
end)

BaseLoading.init=function(self)
    self._size=cc.Director:getInstance():getWinSize()
    self._textures={}
    self._curIndex=1 --当前loaded的图片编号

    self:initTexture()
    self:loadingUI()
end

--需要加载的所有资源文件
BaseLoading.initTexture=function(self)

end

--异步加载图片
BaseLoading.loadTexture=function(self)
    local frameCache=cc.SpriteFrameCache:getInstance()
    --加载图片
    local function loadPng(texture)
        self._label:setString(string.format("Loading...%d%%",math.floor(100*self._curIndex/#self._textures)))
        cclog(string.format("loaded self.textures[%d]:%s",self._curIndex,self._textures[self._curIndex].loc..".png"))
        if self._curIndex==#self._textures then
            self:finishLoading()
        end
        self._curIndex=self._curIndex+1
    end


    --加载Plist图片
    local function loadPlist(texture)
        frameCache:addSpriteFrames(self._textures[self._curIndex].loc..".plist")
        self._label:setString(string.format("Loading...%d%%",math.floor(100*self._curIndex/#self._textures)))
        cclog(string.format("loaded self.textures[%d]:%s",self._curIndex,self._textures[self._curIndex].loc..".png"))
        if self._curIndex==#self._textures then
            self:finishLoading()
        end
        self._curIndex=self._curIndex+1
    end

    local textureCache=cc.Director:getInstance():getTextureCache()
    for i=1,#self._textures do
        local rtype=self._textures[i].rtype
        if rtype=="png" then
            textureCache:addImageAsync(self._textures[i].loc..".png",loadPng)
        elseif rtype=="plist" then
            textureCache:addImageAsync(self._textures[i].loc..".png",loadPlist)
        end
    end
    self:unscheduleUpdate()
end

--loading UI
BaseLoading.loadingUI=function(self)
    local label=cc.Label:createWithTTF("Loading...0%", "res/fonts/Marker Felt.ttf", 32)
    label:setPosition(self._size.width/2,self._size.height/4)
    self:addChild(label)
    self._label=label
end


BaseLoading.startLoading=function(self)
    self:registerScriptHandler(function(tag)
        if tag=="enter" then
            --设置定时器
            self:scheduleUpdateWithPriorityLua(function(dt)
                self:loadTexture()
            end,0)
        elseif tag=="exit" then
            self:unscheduleUpdate()
        end
    end)
end

--完成异步加载图片回调函数
BaseLoading.finishLoading=function(self)

end

return BaseLoading