Cannot use soundchannel inside onEnterFrame.

Karriz

In my main.lua I have the following code:

sounds = {}   sounds.engine = Sound.new("audio/engine.mp3")     sounds.on = function() sets.sounds = true dataSaver.saveValue("sets", sets) end   sounds.off = function() sets.sounds = false dataSaver.saveValue("sets", sets) end   sounds.play = function(sound) if sets.sounds and sounds[sound] then   print("playing sound")   soundChannel1 = sounds[sound]:play(0, true, false) end end

I'm able to use "soundChannel1" in my gamescene.lua:

function gamescene:init()   self:addEventListener(Event.ENTER_FRAME, self.onEnterFrame, self)   local function onTouchesBegin(event)     mousedown = true print("mousedown") if fuel > 1 and success == false and failure == false and escaped == false and paused == false then sounds.play("engine") end     end     local function onTouchesMove(event)       end     local function onTouchesEnd(event)   mousedown = false print("mouseup") soundChannel1:stop()   end     local function onTouchesCancel(event)   mousedown = false print("mouseup") soundChannel1:stop()   end   self:addEventListener(Event.TOUCHES_BEGIN, onTouchesBegin) self:addEventListener(Event.TOUCHES_MOVE, onTouchesMove) self:addEventListener(Event.TOUCHES_END, onTouchesEnd) self:addEventListener(Event.TOUCHES_CANCEL, onTouchesCancel)   end

However, I also need to use the stopping function inside the onEnterFrame of gamescene class.

function gamescene:onEnterFrame() if fuel < 1 or mousedown == false then soundChannel1:stop()

I get the error:

gamescene.lua:698: attempt to index field 'soundChannel1' (a nil value)
stack traceback:
gamescene.lua:698: in function

Any ideas on how could I get around this?

ar2rsawseen

is it possible that you are stopping soundchannel multiple times, after it has been removed from memory?

Karriz

Oh, that's right. Right after entering the scene, before the sound is playing, the function is attempting to stop the sound which results in crash.

I fixed it like this:


if mousedown == false then

--other stuff

elseif fuel < 1 then

--other stuff
soundChannel1:stop()

end