Problem With Scene Manager

ljp1203

Hi all!

I'm having a problem with the Gideros Scene Manager. Whenever I try to click on my button called createBtn, I keep getting an error and it won't allow me to advance onto the next scene. And I can't seem to find the source of the problem.

Here are my files,

main.lua

sceneManager = SceneManager.new({ ["loadmain"] = loadmain, ["login"] = login, ["mainmenu"] = mainmenu, ["createEvent"] = createEvent, ["Party"] = Party, ["Vacation"] = Vacation, ["Other"] = Other, ["ViewEdit"] = ViewEdit, ["Settings"] = Settings, ["Help"] = Help, ["FAQ"] = FAQ, ["About"] = About, })   stage:addChild(sceneManager)   sceneManager:changeScene("login")

mainmenu.lua

mainmenu = gideros.class(Sprite) function mainmenu:init()     --Background Image local background = Bitmap.new(Texture.new("Images/test.png")) stage:addChild(background)   --Create Event Button local createBtn = Bitmap.new(Texture.new("Images/btn1.png")) local createBtn_over = Bitmap.new(Texture.new("Images/btn1_over.png"))   --The Actual Button and Listener local button1 = Button.new(createBtn, createBtn_over) button1:addEventListener("click", function() sceneManager:changeScene("createEvent") end)   --Add Button To Scene button1:setPosition(70, 200) stage:addChild(button1) ------------------------------------------------------------------------------- --Create Event Button local viewBtn = Bitmap.new(Texture.new("Images/btn2.png")) local viewBtn_over = Bitmap.new(Texture.new("Images/btn2_over.png"))   --The Actual Button and Listener local button2 = Button.new(viewBtn, viewBtn_over) button1:addEventListener("click", function() sceneManager:changeScene("ViewEdit") end)   --Add Button To Scene button2:setPosition(70, 450) stage:addChild(button2) ------------------------------------------------------------------------------- --Create Event Button local settingsBtn = Bitmap.new(Texture.new("Images/btn3.png")) local settingsBtn_over = Bitmap.new(Texture.new("Images/btn3_over.png"))   --The Actual Button and Listener local button3 = Button.new(settingsBtn, settingsBtn_over) button1:addEventListener("click", function() sceneManager:changeScene("Settings") end)   --Add Button To Scene button3:setPosition(70, 700) stage:addChild(button3) -------------------------------------------------------------------------------     end

createEvent.lua

mainmenu = gideros.class(Sprite) function mainmenu:init()     --Background Image local background = Bitmap.new(Texture.new("Images/test.png")) stage:addChild(background) --This is just a test image.     end

Here is the error I keep getting:

scenemanager.lua:264: attempt to index field '?' (a nil value)
stack traceback:
scenemanager.lua:264: in function 'changeScene'
main.lua:18: in main chunk


I hope someone can help me with this because I really need this to work, or well then my app is useless

Thanks in Advance!
-Landon

ar2rsawseen

Well there are other parameters you need to pass as:

--Arguments: --start - provided key to reference scene --1 - duration of transition in seconds --SceneManager.flipWithFade - scene transition --easing.outBack - easing sceneManager:changeScene("start", 1, SceneManager.flipWithFade, easing.outBack)

I think easing is the only thing that is optional

ljp1203

That still didn't work, I'm still getting the same error.

petec

Both your main menu.lua and createEvent.lua seem to be setting up the same class main menu and both define the function mainmenu:init(), which will cause confusion. I think that createEvent.lua should start createEvent = gideros.class(Sprite) so that scene manager can find it.
I also notticed that you are adding the backgrounds to the stage. If you want them just to belong to the scene they should be added to self rather than stage.
Good luck!

ljp1203

Hi @petec!

I'm having a issue with the Gideros Scene Manager.

Everytime I click the button that has the listener for changing scenes, it doesn't use the transition that I put down, it just transitions regulary.

Here are my files:

main.lua

sceneManager = SceneManager.new({ ["loadmain"] = loadmain, ["login"] = login, ["mainmenu"] = mainmenu, ["createEvent"] = createEvent, ["Party"] = Party, ["Vacation"] = Vacation, ["Other"] = Other, ["ViewEdit"] = ViewEdit, ["Settings"] = Settings, ["Help"] = Help, ["FAQ"] = FAQ, ["About"] = About, })   stage:addChild(sceneManager)   sceneManager:changeScene("mainmenu")

mainmenu.lua

mainmenu = gideros.class(Sprite) function mainmenu:init()     --Background Image local background = Bitmap.new(Texture.new("Images/test.png")) stage:addChild(background)   --Create Event Button local createBtn = Bitmap.new(Texture.new("Images/btn1.png")) local createBtn_over = Bitmap.new(Texture.new("Images/btn1_over.png"))   --The Actual Button and Listener local button1 = Button.new(createBtn, createBtn_over) button1:addEventListener("click", function() sceneManager:changeScene("createEvent", 1, SceneManager.flipWithFade) end)   --Add Button To Scene button1:setPosition(70, 200) stage:addChild(button1) ------------------------------------------------------------------------------- --Create Event Button local viewBtn = Bitmap.new(Texture.new("Images/btn2.png")) local viewBtn_over = Bitmap.new(Texture.new("Images/btn2_over.png"))   --The Actual Button and Listener local button2 = Button.new(viewBtn, viewBtn_over) button1:addEventListener("click", function() sceneManager:changeScene("ViewEdit") end)   --Add Button To Scene button2:setPosition(70, 450) stage:addChild(button2) ------------------------------------------------------------------------------- --Create Event Button local settingsBtn = Bitmap.new(Texture.new("Images/btn3.png")) local settingsBtn_over = Bitmap.new(Texture.new("Images/btn3_over.png"))   --The Actual Button and Listener local button3 = Button.new(settingsBtn, settingsBtn_over) button1:addEventListener("click", function() sceneManager:changeScene("Settings") end)   --Add Button To Scene button3:setPosition(70, 700) stage:addChild(button3) -------------------------------------------------------------------------------     end

createEvent.lua

createEvent = gideros.class(Sprite) function createEvent:init()     --Background Image local background = Bitmap.new(Texture.new("Images/test.png")) stage:addChild(background)     end

I really need help with this, or my app won't work

Thanks in Advance!
-Landon