用Lua又写了遍2048.这回发现比之前写的更快了。在上下左右移动块的上边，例如像左移动：那么需要遍历的则

是x轴方向。并且是跟移动方向相反的向右进行遍历。此时定义一个对象，记录向右遍历的第i个的值，记录后将此值

赋给它左边的那个值(这里说的通俗些，坑了勿喷!)最后代码呈上。有需要的可留言，可以找我要代码一起学习。

function GameScene:leftCombineNumber()
    if (isPlay == false) then
        return true
    end
    
    local card
    local nextCard
    for j = 0,3 do
        for i = 0,3 do
            card = cardList[i..":"..j]
            if(card:getData() ~= 0) then
                local k = i+1
                while(k < 4) do
                    nextCard = cardList[k..":"..j]
                    if (nextCard:getData() ~=0) then
                        if(card:getData() == nextCard:getData()) then
                            card:setNum(card:getData()*2)
                            nextCard:setNum(0)
                            totalscore = totalscore+card:getData()
                        end 
                        k = 4
                        break
                    end   
                    k = k + 1 
                end
            end
        end
    end
    
     for j = 0,3 do
            card = cardList[i..":"..j]
            if(card:getData() == 0) then
                local k = i+1
                while(k < 4) do
                    nextCard = cardList[k..":"..j]
                    if (nextCard:getData() ~=0) then
                        card:setNum(nextCard:getData())
                        nextCard:setNum(0)
                        k = 4
                    end   
                    k = k + 1 
                end
            end
        end
    end
    self:updateNumber()
end