"Attempt to index upvalue" is driving me crazy

Getting Started Newbie Questions
#21

Here is the working widget code:

[lua]

–
– main.lua

– Get pixel width and height of device you are running on –

local Screen_Width = display.pixelWidth
local Screen_Height = display.pixelHeight

local titleScreenGroup
local titleScreen
local startButton
–local Player – I’ve tried with and without this declaration
–local Player_StartX
local widget = require (“widget”)

– Variables to control flow of game –

local Game_Over = 0

----------------------------------------FUNCTION SECTION----------------------------------

-----------------------------------INITIALIZE GRAPHICS------------------------------------

– This section is where we load the graphic images used in our game and set their –
– initial positions. –

function Show_Title_Screen()
display.setStatusBar(display.HiddenStatusBar)
titleScreenGroup = display.newGroup()

titleScreen = display.newImage(“titlescreen.png”, 0, 0, true)
titleScreen.x = (display.contentWidth / 2)
titleScreen.y = (display.contentHeight / 2)

startButton = widget.newButton
{
left = 60,
top = Screen_Height / 2,
label = “Start”,
labelAlign = “center”,
font = “Arial”,
fontSize = 18,
labelColor = { default = {0,0,0}, over = {255, 255, 255} },
onEvent = onButtonEvent
}

– startButton = display.newImage(“startbutton.png”)
– startButton.x = Screen_Width / 2
– startButton.y = Screen_Height - (Screen_Height / 2)
– startButton.name = “startButton”

titleScreenGroup:insert(titleScreen)
titleScreenGroup:insert(startButton)

startButton:addEventListener(“tap”, loadGame);

end

–function loadGame(event)
– if event.target.name == “startbutton” then
– transition.to(titleScreenGroup, { time = 500, alpha = 0, onComplete = Graphics_Initialization});
– startButton:removeEventListener(“tap”, loadGame)
– end
–end

--------------------- THE BELOW CODE WORKS FOR WIDGETS ------

function loadGame(onEvent)
if onEvent.target == startButton then
transition.to(titleScreenGroup, {time = 500, alpha=0,
onComplete = Graphics_Initialization});
startButton:removeEventListener(“tap”, loadGame)
end
end

function Graphics_Initialization ()

– Player Set-Up –
Player = display.newImage (“crate.png”)
Player.x = 100
Player.y = (Screen_Height - Player.contentHeight * 2)
Player.name = “player”

– Background Set-Up –

end

function movePlayer (event)
local phase = event.phase
–local Player_StartX
–local Player_StartY

if “began” == phase then
Player_StartX = event.x - Player.x
–Player_StartY = event.y - Player.y
else if “moved” == phase then
Player.x = event.x - Player_StartX
if Player.x < (Player.contentWidth *.5) then
Player.x = (Player.contentWidth * .5) end
if Player.x > (Screen_Width - (Player.contentWidth *.5)) then
Player.x = (Screen_Width - (Player.contentWidth *.5)) end

–Player.y = event.y - Player_StartY

end
end

end

function main ()
Show_Title_Screen()
–Graphics_Initialization()
Runtime:addEventListener(“touch”, movePlayer)

end

main()
[/lua]

#22

I moved the line to the end of the Graphics_Initialization function. It worked like a charm.

Thank you so much for your help. I really appreciate it.

-Spo-

#23

welcome

as to why it doesnt work when using an image is cause of the transition.to more then likely

as to why it worked with widget idk cause the transition.to is still there, also the use of widget is incoreect

the onEvent option should be calling loadGame() and you shouldn’t have the eventListener added to the button