Question

我已经阅读了与此主题相关的其他主题，并且从我的代码意义上讲无法理解它们。在下面的代码中，我无法将制作其他单词按钮放入表格中。我可以生成单词，但不会进入表格。使用正确单词的上一个函数工作正常。我究竟做错了什么？我在代码的其他地方有问题吗？

--main text

local content = require "content"

--chooses a random number according to the maximum number available in the table

local defaultWidth = 1024
local defaultHeight = 768
local displayWidth = display.viewableContentWidth
local displayHeight = display.viewableContentHeight
local yMargin = 20
local centerX = defaultWidth/2;
local centerY = defaultHeight/2;
local xAdjust = (defaultWidth - display.viewableContentWidth)/2
local yAdjust = (defaultHeight - display.viewableContentHeight)/2
local rnd = math.random
local maxSightwords = 3
local currQuestion = 0
local playOrder
local letterButtons
local wrongGraphic
local correctButton
--local wordButtons


function getRandomOrder(amount)
    local order ={}
    local i
    local temp
    local temp1
    for n = 1,amount do
        order[n] = n
    end
    for i=0,9 do
        for temp = 1,amount do
            n = math.random(1, amount)
            temp1 = order[temp]
            order[temp] = order[n]
            order[n] = temp1
        end
    end
    return order

end 

    -- assign random order for words
    playOrder = getRandomOrder(#content)


function nextQuestion()

    -- update question number index
    currQuestion = currQuestion+1
    if currQuestion > #playOrder then
        currQuestion = 1
    end

    local questionNumber = playOrder[currQuestion]

    print("Question# "..currQuestion)
    print("id "..content[questionNumber].id)

    -- make word buttons
    wordButtons = {}

    -- make word button for correct word
    local word = content[playOrder[currQuestion]].word
    table.insert(wordButtons, newWordButton(word))
    correctButton = wordButtons[1].graphics
    local buttonWidth = 150

    print ("correct: "..word)
    print (#wordButtons)


    ---[[
    -- ****make other word buttons***
    local otherWords = getRandomWords(content.word)

    --print (otherWords)
    for i=1, maxSightwords-1 do
        table.insert(wordButtons, otherWords)

    end
    --]]
    print (#wordButtons)



    -- position letter buttons and add touch event listener
    local randomWordOrder = getRandomOrder(#wordButtons)
    local buttonSpacing = buttonWidth * 1.5
    local buttonsWidth = (#wordButtons * buttonWidth) + ((#wordButtons-1) * (buttonSpacing/4))
    local buttonsX = centerX - (buttonWidth)
    for i=1, #wordButtons do
        local button = wordButtons[i].graphics
        button.y = centerY
        button.x = buttonsX + (buttonSpacing * (randomWordOrder[i]-1))
        button:addEventListener("touch", onWordTouch)
        --local randomDelay = transitionDuration + (math.random(1,10) * 10)
        --transition.from(button, {time = 500, delay = randomDelay, y = defaultHeight + button.height})
    end

end

function clearQuestion()
    -- remove wrongGraphic if present
    if wrongGraphic then
        wrongGraphic:removeSelf()
        wrongGraphic = nil
    end

    -- remove all word buttons
    for i=1,#wordButtons do
        wordButtons[i].graphics:removeSelf()
        wordButtons[i].graphics = nil
    end
end


function onWordTouch(event)
    local t = event.target
    if "ended" == event.phase then
        if t == correctButton then
            onCorrect()
        else
            onIncorrect(t)
        end

    end
end

function onIncorrect(incorrectButton)
    media.playSound("sounds/splat.wav")
    wrongGraphic = display.newImageRect("images/graphics/wrong.png", 137, 136)
    wrongGraphic.x = incorrectButton.x + incorrectButton.width/2
    wrongGraphic.y = incorrectButton.y + incorrectButton.height/2
    transition.to(incorrectButton, {time=100, delay=500, alpha=0})
    transition.to(wrongGraphic, {time=200, delay=500, alpha=0, onComplete=wrongCompleteListener})
    local wrongCompleteListener = function(obj)
       obj:removeSelf()
       obj = nil
       incorrectButton:removeSelf()
       incorrectButton = nil
    end
end

function onCorrect()
    -- play correct sound then display word
    media.playSound("sounds/correct.mp3", playWord)

    -- remove the letter buttons
    clearQuestion()

    -- disable the home button until new screen is shown
    homeEnabled = false
end



function newWordButton(word)
    local wordGraphic = display.newImageRect("images/words/"..word..".png", 150, 75)
    local wordButton = {}
    wordButton.graphics = display.newGroup()
    wordButton.graphics:insert(wordGraphic)
    wordButton.word = word
    return wordButton   
end

function getRandomWords ()
    local wordGraphic = display.newGroup ()
    for i=1,maxSightwords-1 do
    --remove a word from content using a random index #
    --Since the index will be between 1 and the number of words in content
    --and each time through the loop a word is removed, you can be sure
    --You will get 3 different words without repeats.
    local next_word = table.remove(content, math.random(#content))

    --next_word is a table with 'word' and 'id' fields so you can make the text display object from next_word.word
    local wordText = display.newImageRect("images/words/"..next_word.id..".png", 150, 75)
            wordText.x = display.contentWidth/2
            wordText.y = display.contentHeight/2 - 100
            wordGraphic:insert(wordText)
        print (next_word.id)
    end 
end

nextQuestion ()

Answer 1

我认为您的问题是您要在功能wordButton = {}中重新设置newWordButton。您已经在function nextQuestion()中创建了表格，因此在newWordButton函数中再次调用它会重置整个表格。

看一下这个链接：

http://www.coronalabs.com/blog/2011/06/21/understanding-lua-tables-in-corona-sdk/

http://docs.coronalabs.com/api/library/table/insert.html

我很确定该功能应如下所示：

function newWordButton(word)
    local wordGraphic = display.newImageRect("images/words/"..word..".png", 150, 75)
    wordButton.graphics = display.newGroup()
    wordButton.graphics:insert(wordGraphic)
    wordButton.word = word
    return wordButton   
end

Corona SDK：插入表格

1 个答案: