1

我的 updateScore 有问题，我的功能是用户第一次玩游戏。

它将创建我的名为 myFile.txt 的文件来记录分数，现在执行此操作的代码是（如果 reader then）查看文件是否存在，如果不存在，如果已经有文件，它将转到我的else那么我的内容应该有一个分数的值，然后我可以用它来比较并得到我的高分。

问题是我的内容总是返回nil值，因此你在玩时总是得到的分数将取代应该是我的高分的分数，我不知道我做错了什么。

这是我的代码

function updateScore()

    local path = system.pathForFile( "myfile.txt", system.DocumentsDirectory )
    local reader = io.open( path, "r" )
    local file = io.open( path, "w" )

    if reader then

        reader:close()
        local reader1 = io.open( path, "r" )
        local contents = reader1:read("*n")


        if (stopscore == false) then
            score = score + 1
            scoreText.text = "score: " .. score
            scoreText:setReferencePoint(display.CenterLeftReferencePoint)
            scoreText.x = 0
            scoreText.y = 30
        end

        if (stopscore == true) then

            if (contents == nil) then
                local file = io.open( path, "w" )
                file:write(score)
                file:flush()
                file:close()
                timer.pause(timer1)
                director:changeScene( "menu", "downFlip" )

            else

                if (contents < score) then
                    file:write(score)
                    file:flush()
                    file:close()
                    timer.pause(timer1)
                    director:changeScene( "menu", "downFlip" )
                else
                    file:write(contents)
                    file:flush()
                    file:close()
                    timer.pause(timer1)
                    director:changeScene( "menu", "downFlip" )
                end

            end
        end

    else

        local file1 = io.open( path, "w" )
        local walaVal=0
        file1:write(walaVal)
        file1:close()

        if (stopscore == false) then
            score = score + 1
            scoreText.text = "score: " .. score
            scoreText:setReferencePoint(display.CenterLeftReferencePoint)
            scoreText.x = 0
            scoreText.y = 30
            print(contents)
        end

        if (stopscore == true) then
            local file = io.open( path, "w" )
            file:write(score)
            file:flush()
            file:close()
            timer.pause(timer1)
            director:changeScene( "menu", "downFlip" )
        end

    end
end
4

1 回答 1

0

内容返回 nil，因为 local file = io.open( path, "w" )当您调用此代码时，此代码会出现问题，它将擦除文件的所有内容以解决此问题，当您调用本地文件时，您必须删除模式“w”，当您调用本地文件file = io.open(path)时要更新分数，您应该再次输入模式“w”以进一步理解我在说什么，我将编写并解释代码。

--first check the file if exist
   local path = system.pathForFile( "myfile.txt", system.DocumentsDirectory )
   local file = io.open(path)

-- if file exist check the content and read the score else create a file and write the score

  if file then
      local reader = io.open( path, "r" )
      local contents = reader:read("*n")
-- if content is less than myScore Update the Score
     if contents < myScore then
     file = io.open(path,"w")
     file:write(myScore)
         file:flush()
         file:close()
     end
 else
    file = io.open(path,"w")
    file:write(myScore)
    file:flush()
    file:close()
 end

希望我为你解释清楚:)

于 2013-07-28T14:55:29.603 回答