Stack traceback when i run my app in the simulator

Getting Started Newbie Questions
#61

It just shows me a white screen . I think it works

#62

Yes it works.

–SonicX278

#63

I’m fixing my code now thanks .

#64

Where do i put my event listeners ?

#65

You put all your code into the scene:show.

But make sure your code is clean and scope issues resolved. 

–SonicX278

#66

Just as an FYI, I’ve deleted the duplicate post.

#67

Where do i put my functions because when i put it in the scene:show it doesn’t work 

#68

Please read this:  https://coronalabs.com/blog/2015/06/16/tutorial-scope-for-beginners/

Rob

#69

How does that help ?

#70

Because it tells you where to put things…

Rob

#71

I went over it more than 10 times and i still don’t know where to put everything .

#72

Have you looked at this?

https://coronalabs.com/blog/2015/04/14/tutorial-the-basic-game-template/

Rob

#73

Add everything in one by one … Make sure everything is working.

–SonicX278

#74

Yes I did i took my times with it more than 10 times and i still don’t know where to put anything. That’s what i’m doing and i still don’t know where to put not one function .

#75

Hmm can you post the code you want redone?

–SonicX278

#76 
-- requires local physics = require "physics" physics.start() local composer = require( "composer" ) local scene = composer.newScene() -- background function scene:createScene(event) local screenGroup = self.view local background = display.newImageRect("bg.png",display.contentWidth,display.contentHeight) background.x = display.contentCenterX background.y = display.contentCenterY local city1 = display.newImage("city1.png") city1.x = 240 city1.y = 210 city1.speed = 2 local city2 = display.newImage("city1.png") city2.x = 240 city2.y = 270 city2.speed = 2 local city3 = display.newImage("city2.png") city3.x = 240 city3.y = 270 city3.speed = 3 local jet = display.newImage("redJet.png") jet.x = 100 jet.y = 100 physics.addBody(jet, "dynamic", {density=.1, bounce=0.1, friction=.2, radius=12}) local city4 = display.newImage("city2.png") city4.x = 240 city4.y = 270 city4.speed = 3 end function scrollCity( self, event ) if self.x \< -200 then self.x = 200 else self.x = self.x - self.speed end end -- jet function activateJets( self, event ) self:applyForce(0, -3.0, self.x, self.y) end function touchScreen( event ) if event.phase == "began" then jet.enterFrame = activateJets Runtime: addEventListener("enterFrame", jet) end if event.phase == "ended" then Runtime: removeEventListener("enterFrame", jet) end end function scene:enterScene(event) city1.enterFrame = scrollCity Runtime:addEventListener("enterFrame", city1) city2.enterFrame = scrollCity Runtime:addEventListener("enterFrame", city2) city3.enterFrame = scrollCity Runtime:addEventListener("enterFrame", city3) city4.enterFrame = scrollCity Runtime:addEventListener("enterFrame", city4) Runtime:addEventListener("touch", touchScreen) end function scene:exitScene(event) end function scene:destroyScene(event) end scene:addEventListener("createScene", scene) scene:addEventListener("enterScene", scene) scene:addEventListener("exitScene", scene) scene:addEventListener("destroyScene", scene) return scene
#77

The template that comes with Composer should show you.  Read the game.lua template. It’s commented heavily saying where to put things. But to repeat the tutorials:

-- top if scene file -- local composer = require( "composer" ) local scene = composer.newScene() -- put your other require's here and create the scene local json = require( "json" ) -- put any forward declared variables here: local score = 0 local level = 1 -- put any functions that need to be used throughout the app. -- put them in the reverse order they are accessed. In other words if -- function A calls function B, function B needs to be declared before function A or it has to be forward declared -- -- You put your functions here -- local function incrementLevel() &nbsp;&nbsp;&nbsp;&nbsp; level = level + 1 end -- -- now declare the scene's events -- function scene:create( event ) ... end function scene:show( event ) ... end function scene:hide( event ) ... end function scene:destroy( event ) ... end -- define the event handlers scene:addEventListener( "create", scene ) scene:addEventListener( "show", scene ) scene:addEventListener( "hide", scene ) scene:addEventListener( "destroy", scene ) -- -- return the required object -- return scene
#78 
function scene:exitScene(event) end function scene:destroyScene(event) end scene:addEventListener("createScene", scene) scene:addEventListener("enterScene", scene) scene:addEventListener("exitScene", scene) scene:addEventListener("destroyScene", scene)

This is all “Storyboard” code. It is not Composer code.

Composer code uses these functions:

function scene:create( event ) ... end function scene:show( event ) ... end function scene:hide( event ) ... end function scene:destroy( event ) ... end -- define the event handlers scene:addEventListener( "create", scene ) scene:addEventListener( "show", scene ) scene:addEventListener( "hide", scene ) scene:addEventListener( "destroy", scene ) -- -- return the required object -- return scene

You can either use Composer or you can use Storyboard, but you can’t mix them.

Rob

#79

So I can still use storyboard for my project ?

#80

Yes. Back like the 3rd post in this thread from RoamingGamer, he said exactly what you need to do to keep using Storyboard, but to save you time:

  1. Go to:   http://github.com/coronalabs/framework-storyboard-legacy

  2. Download it.

  3. Copy the storyboard.lua to your project in the same folder as your main.lua

That’s it. You can keep using storyboard.

Rob