Whats wrong with my code

Games
#1

Hey guys, i’ve been stuck on this for a while now and really need help. Basically what I’m trying to do is have these objects spawn on screen and then allow the player to drag them around as they want. 

At the moment the random objects flow onto screen, however when I try to click on ‘star1’ I get the error :

Attempt to index local ‘star1’ (a nil value)

How should I do this properly?

Here is my code: 

display.setStatusBar(display.HiddenStatusBar) local physics = require('physics') physics.start() --physics.setGravity(0, 0) \_W = display.contentWidth; --Returns Screen Width \_H = display.contentHeight; --Returns Screen Height local bg = display.newImage('bg1.png') local starTable = {} ship = display.newImage("head.png") ship.name = "ship" ship.x = -80 ship.y = 100 physics.addBody(ship, { isSensor = true }) ship.bodyType = 'dynamic' shipIntro = transition.to(ship,{time=4000, x=200}) ship.width = 40 ship.height = 40 ship.gravityScale = 0 function initStar() local star1 = {} star1.imgpath = "acorn.png" star1.movementSpeed = 10000 table.insert(starTable, star1) local star2 = {} star2.imgpath = "enemyA.png" star2.movementSpeed = 12000 table.insert(starTable, star2); local star3 = {} star3.imgpath = "star3.png" star3.movementSpeed = 14000 table.insert(starTable, star3) end function getRandomStar() local temp = starTable[math.random(1, #starTable)] local randomStar = display.newImage(temp.imgpath) randomStar.myName = "star" randomStar.movementSpeed = temp.movementSpeed randomStar.x = math.random(0,\_W) randomStar.y = \_H + 50 -- Start the star off screen randomStar.rotation = math.random(0,360) starMove = transition.to(randomStar, { time=randomStar.movementSpeed, y=-45, onComplete = function(self) self.parent:remove(self); self = nil; end }) -- Move the star end function star1:touch( event ) if event.phase == "began" then self.markX = self.x self.markY = self.y elseif event.phase == "moved" then local x = (event.x - event.xStart) + self.markX local y = (event.y - event.yStart) + self.markY self.x, self.y = x, y -- move object based on calculations above end return true end star1:addEventListener( "touch", star1 ) starTimer1 = timer.performWithDelay(1700,getRandomStar, 0) starTimer2 = timer.performWithDelay(2300,getRandomStar, 0) starTimer3 = timer.performWithDelay(2700,getRandomStar, 0) initStar()
#2

Looks like a scoping issue.  Move these lines out of initStar, and instead place them toward the top of your code (outside of any function):

local star1 = {} local star2 = {} local star3 = {}
#3

Hey JonPM, thanks for the reply, I added your suggestion and am now getting an error with the touch listener. Here is what is showing up: 

Attempt to call method ‘addEventListener’ (a nil value)

star1:addEventListener( "touch", star1)
#4

Touch listeners can only be added to display objects, but star1 is only a table, so there is nothing to touch.

#5

Oh ok, I see what you mean. So how should my code look if i want to add a local image which can be spawned over and over and that it can be dragged by the user?

#6

Looks like a scoping issue.  Move these lines out of initStar, and instead place them toward the top of your code (outside of any function):

local star1 = {} local star2 = {} local star3 = {}
#7

Hey JonPM, thanks for the reply, I added your suggestion and am now getting an error with the touch listener. Here is what is showing up: 

Attempt to call method ‘addEventListener’ (a nil value)

star1:addEventListener( "touch", star1)
#8

Touch listeners can only be added to display objects, but star1 is only a table, so there is nothing to touch.

#9

Oh ok, I see what you mean. So how should my code look if i want to add a local image which can be spawned over and over and that it can be dragged by the user?