composer remove a scene properly & remove variable (not an object)

[layhwang]

@davebollinger

it’s because you’re assigning the value to the variable outside of any function, so that code will run only once when the scene in loaded - because by default the scene code itself is not unloaded/reloaded during a scene change, so simply *displaying* a previously loaded scene for a second/third/etc time will NOT cause that code to reload/re-execute.

you can fix this by recycling old scenes to unload their code, forcing a reload on next display.  (as others have already mentioned)

or you can fix it without recycling by getting into the habit of not *assigning* values at module scope.  it’s ok to *declare* those free-floating locals at the top of your module, but assign their values in either create (if it needs to happen just once) or in show (if it needs to happen each time scene displayed).  then clean up correspondingly in either destroy or hide.

OMG thank you sooooo much!! I just add a line of ‘composer.recycleOnSceneChange = true’ and it fix! how amazing

btw, could I ask you another question (Great explanation and I really understand the theory )

My overlay scene still passing touches to scene behind, even in the showOverlay function I had set ‘isModal = true’

the code :

[lua]

function closeSideBar(event)

–closeSideBar 

end

function iconListener1( event )

–code of tutorial building a sliding menu

    if ( event.phase == “moved” ) then

        local dx = math.abs(event.x - event.xStart ) 

        if ( dx > 5 ) then

            scrollView:takeFocus( event ) 

        end

– added my code

local options = {

effect = “fade”,

time = 100,

isModal = true

}

elseif ( event.phase == “ended” ) then

composer.showOverlay(“a”,options)

–original tutorial code

timer.performWithDelay( 10, function() 

scrollView:removeSelf(); scrollView = nil; end )

return true

end

return true

end

– continue with other function of other button in sidebar menu

–the sidebar menu code-from the same tutorial

[/lua]

Thanks