Can't Add a Runtime Listener?

Getting Started Newbie Questions
1

Hi All,

I’m trying to add a Runtime listener to implement a swipe function to show an options menu. However Everytime I add the listener the simulator crashes with an “Assertion Error” error.

this is the code i’m adding:

Runtime:addEventListener( "touch", onScreenTouch ) local function onSceneTouch( self, event ) if event.phase == "ended" then if event.xStart \< event.x and (event.x - event.xStart) \>= 30 then transition.to ( optionsGroup, { time = 500, x=75 } ) transition.to ( optionsGroup, { time = 500, alpha = 1, delay = 200} ) transition.to ( optionsButt, {time = 500, x=(backEdgeX + 250)} ) return true end end end

Any ideas why I suddenly can’t add this listener?

2

You can’t add it until it exists.  Move the addEventListener below the function definition.

3

Hi Rob,

Thanks for the reply. I have the function defined near the top of my code right before the CreatScene. I have put the Runtime:addEventListener near the bottom with all the scene listeners for storyboard.

I still get the error Assertion Failed.

4

And take the “self” out of the parameters.

I would also put the listener for this in your enterScene() function and then remove it in exitScene()

Thanks

Rob

5

Hi Rob,

I have tried putting it in the enter scene, and almost everywhere else possible. And I still get the same error. I did remove the “self” though.

6

Found the problem. I had onScreenTouch in the listener declaration, and onSceneTouch in the actual function… so just a typo. The joys of programming.

Sorry for the waste of time lol.

7

You can’t add it until it exists.  Move the addEventListener below the function definition.

8

Hi Rob,

Thanks for the reply. I have the function defined near the top of my code right before the CreatScene. I have put the Runtime:addEventListener near the bottom with all the scene listeners for storyboard.

I still get the error Assertion Failed.

9

And take the “self” out of the parameters.

I would also put the listener for this in your enterScene() function and then remove it in exitScene()

Thanks

Rob

10

Hi Rob,

I have tried putting it in the enter scene, and almost everywhere else possible. And I still get the same error. I did remove the “self” though.

11

Found the problem. I had onScreenTouch in the listener declaration, and onSceneTouch in the actual function… so just a typo. The joys of programming.

Sorry for the waste of time lol.