Attempt to Index GlobalCredits 'event' (a nil value)

manpreet Best Answer 2 years ago

I have just started to learn LUA in school, but i cannot find many helpful tutorials o the internet to aid in my learning. I have made a simple game (which doesn't work yet, i realize that) and a main menu. However, when i try to start the app, it gives me this error:

/Users/jordanmcbride/Desktop/Lua Projects/Tapinator/main.lua:47: attempt to index global 'showCredits' (a nil value)
stack traceback:
/Users/jordanmcbride/Desktop/Lua Projects/Tapinator/main.lua:47: in main chunk
[Finished in 9.4s]

I have looked the error, and I cannot seem to understand how to fix it. The other questions have said something about returning the function returning a nil value, and that I should add a return statement to the end, but that doesn't work either.

Here is the code @ line 47.

function showCredits.touch(e)
    playButton.isVisible = false
    creditsButton.isVisible = false
    creditsView = display.newImage('credits.png', 0, display.contentHeight)

    lastY = name.y
    transition.to(name, {time = 300, y = display.contentHeight * 0.5 - title.height - 25})
    transition.to(creditsView, {time = 300, y = display.contentHeight * 0.5 + creditsView.height, onComplete = function() creditsView:addEventListener('tap', hideCredits) end})
end

Here is my full code, in case the problem lies elsewhere:

display.setStatusBar(display.HiddenStatusBar)

radius = 40

smallTime = 200
bigTime = 800

score = 0
scoreInc = 2000

--HomePage
local name
local playButton
local creditsButton
local homePage

--Credits
local creditsPage


--Sounds
local circleSpawn = audio.loadSound( "circle_spawn.wav" )
local circleTap = audio.loadSound( "circle_tap.wav" )

function Main()
    name = display.newImage('title.png', display.contentWidth / 2, 53

manpreet 2 years ago

--function preallocation
local onPlayTap
local onSoundOnTap
local onSoundOffTap
local onCreditsTap
local onHelpTap

---------------------------------------------------------------------------------
-- Custom Function Definitions
---------------------------------------------------------------------------------
--Called when Sound On Button is tapped, turn off sound
onSoundOnTap = function(event)

end

--Called when Sound Off Button is tapped, turn on sound
onSoundOffTap = function(event)

end

--Called when Credits button is tapped, shows credits
onCreditsTap = function(event)

end

--Called when Help button is tapped, shows help
onHelpTap = function(event)

end

--Callback to Play button. Moves scene to Level Picker Scene
onPlayTap = function(event)

end

local showCredits = {}
function showCredits.touch(e)

end

local hideCredits = {}
function hideCredits.touch(e)

end