attempt to index global 'sceneManager' (a nil value) problem

loves_oi · September 2012

I'm taking this error:

sources/screens/optionScreen.lua:193: attempt to index global 'sceneManager' (a nil value)
stack traceback:
	sources/screens/optionScreen.lua:193: in function <sources/screens/optionScreen.lua:184>

this the line which causes error:

sceneManager:changeScene("results", 1, SceneManager.flipWithFade, easing.outBack,mydata)

I thought that code dependency may cause this error. But it is seen no problem in dependency , i think. I added the photo of dependencies.
i checked the sceneManager.lua. It exists in my project in sources->classes->sceneManager.lua
What may cause the error ? Any idea?
Thanks in advance.

talis · September 2012

Do you have a scene defined like "results" in your scenecontroller.lua (Scenemaneger).
(Also corresponding lua file to "results" scene)

loves_oi · September 2012

yes , defined result scene, here: (in main.lua)

sceneManager = SceneManager.new({
--	["logoScreen"] = logoScreen,
--	["menuScreen"] = menuScreen,
--	["gameScreen"] = gameScreen,
--	["levelEndScreen"] = levelEndScreen,
--	["nextLevelScreen"] = nextLevelScreen,
	["optionScreen"] = optionScreen,
	["results"] = results,
	["switch"] = switch,
	["sld"] = sld
})
 
local scenes = {"optionScreen" , "results" , "switch" , "sld" }

it can change to optionScreen page. But it cannot change from optionScreen page to results page

talis · September 2012

do you have results.lua file in your project and inside it did you define results class? If yes can you please post here for further investigation:D

loves_oi · September 2012

i found the reason of the error. I was unintentionally creating the instance of sceneManager class two times at main.lua. Namely:

 
sceneManager = SceneManager.new({
 
	["scene1"] = scene1
})
 
local scenes = {"scene1"  }
 
.........
 
sceneManager = SceneManager.new({
	["optionScreen"] = optionScreen,
	["results"] = results,
	["switch"] = switch,
	["sld"] = sld
})
 
local scenes = {"optionScreen" , "results" , "switch" , "sld" }

When i delete the first one , it works perfectly.

But now i have encountered a new problem. I'm trying to integrate keyboard code(i did a login page using this) with the sceneManager code.

If i explain it more clearly , i have two different projects; one for login page and the other one for checkbox page. It works perfectly.

Now i'm trying to integrate them. After login page , the user is redirected to the checkbox page. But after integrating them , the size of checkboxes page and the other pages which follows checkbox page increased. I added the photos which shows run process after integrating both code.

Actually , before integrating them , checkboxes page and the pages which follows it looked smaller . After integrating with keyboard , it looks so big and the screen is not enough.

How can i make it smaller? Why does the size of them increase?

Here is my main:

 
	local keyboard = KeyBoard.new("en_GB")
	keyboard:Create()
 
	local label1 = TextField.new(nil,"Username : ")
	label1:setPosition(40, 45)
	label1:setTextColor(0xFF1300)
	stage:addChild(label1)
 
	local label2 = TextField.new(nil,"Password")
	label2:setPosition(40, 100)
	label2:setTextColor(0xFF1300)
	stage:addChild(label2)
 
	local inputbox = InputBox.new(150,20,150,40)
	inputbox:setText("")
	inputbox:SetKeyBoard(keyboard)
	inputbox:setBoxColors(0xefefef,0xff2222,0,1)
	inputbox:setActiveBoxColors(0xff5555,0xff2222,0,1)
	stage:addChild(inputbox)
 
	local inputbox2 = InputBox.new(150,80,150,40)
	inputbox2:setText("")
	inputbox2:SetKeyBoard(keyboard)
	inputbox2:setBoxColors(0xefefef,0xff2222,0,1)
	inputbox2:setActiveBoxColors(0xff5555,0xff2222,0,1)
	stage:addChild(inputbox2)
 
	stage:addChild(keyboard)
 
	local a = TextField.new(nil,"Loading")
 
	local upp = Bitmap.new(Texture.new("button.png"))
	local down = Bitmap.new(Texture.new("application lifecycle.png"))
 
	-- create the button
	local button = Button.new(upp, down)
	button:setPosition(200, 120)
	stage:addChild(button)
 
	nameTaken = ""
	local click = 0
 
button:addEventListener("click",
	function()
		if inputbox:getText() == "test" then
			inputbox:setText("done")
		else
			nameTaken = inputbox:getText()
			passwordTaken = inputbox2:getText()
			print (nameTaken)
			print (passwordTaken)
 
			print (nameTaken .. "---")
 
			local loader = UrlLoader.new("<a href="http://localhost/checklogin.php?myusername=&quot" rel="nofollow">http://localhost/checklogin.php?myusername=&quot</a>; .. nameTaken .. "&mypassword=" .. passwordTaken)
 
			local function onComplete(event)
 
				local myString=event.data      -- We got the string here.
				print ("myString = " .. myString)
				local length = string.len(myString)
				local i = 1
 
				local echoString = ""
				while (i < length+1) do
 
					echoString = echoString .. string.sub(myString,i,i)
					i = i+1;
				end
 
				a:setText(echoString)
				a:setPosition(10, 185)
				a:setTextColor(0x007B25)
				stage:addChild(a)
 
				print (echoString)
 
				loader:removeEventListener(Event.COMPLETE, onComplete)
 
				controlName = string.sub(echoString,1,7)
 
				if(controlName == 'Welcome') then
					------------------------
					sceneManager = SceneManager.new({
	["optionScreen"] = optionScreen,
	["results"] = results,
	["switch"] = switch,
	["sld"] = sld
})
 
local scenes = {"optionScreen" , "results" , "switch" , "sld" }
 
sceneManager:addEventListener("transitionBegin", function() print("manager - transition begin") end)
sceneManager:addEventListener("transitionEnd", function() print("manager - transition end") end)
 
--add manager to stage
 
stage:addChild(sceneManager)
 
 transitions = {
	SceneManager.moveFromLeft,
	SceneManager.moveFromRight,
	SceneManager.moveFromBottom,
	SceneManager.moveFromTop,
	SceneManager.moveFromLeftWithFade,
	SceneManager.moveFromRightWithFade,
	SceneManager.moveFromBottomWithFade,
	SceneManager.moveFromTopWithFade,
	SceneManager.overFromLeft,
	SceneManager.overFromRight,
	SceneManager.overFromBottom,
	SceneManager.overFromTop,
	SceneManager.overFromLeftWithFade,
	SceneManager.overFromRightWithFade,
	SceneManager.overFromBottomWithFade,
	SceneManager.overFromTopWithFade,
	SceneManager.fade,
	SceneManager.crossFade,
	SceneManager.flip,
	SceneManager.flipWithFade,
	SceneManager.flipWithShade,
}
 
 
--start start scene
sceneManager:changeScene("optionScreen", 1, SceneManager.flipWithFade, easing.outBack)
 
 
				end
			end
 
			local function onError()
				print("error")
			end
 
			local function onProgress(event)
				print("progress: " .. event.bytesLoaded .. " of " .. event.bytesTotal)
			end
			loader:addEventListener(Event.COMPLETE, onComplete)
			loader:addEventListener(Event.ERROR, onError)
			loader:addEventListener(Event.PROGRESS, onProgress)
		end
 
	end) --end of function which exist in button:addEventListener

loves_oi · September 2012

Everything in every page is still bigger than normal size. I can't find why..
Here is another example of the problem. (I can't see any difference between their codes:S ) How to to fix it?

Any help will be appreciated..

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