Object cleaning in custom event

Games
#1

Hi there, I’m having an error when removing an object from a custom event raised in a touch handler, in this event I’m only destroying the object by obj:removeself() and obj = nil.

If I double click fast enough ( two touches ) on the area that is listening touches, I get the error "attempt to call method ‘dispatchEvent’ (a nil value).

Here’s my code simplified:

  
function playArea:spawn()  
  
 local obj = Objeto:new()  
 obj.id = "obj\_" .. lastObjNum   
  
 playArea:insert(obj)  
 obj:setReferencePoint ( display.CenterReferencePoint )  
 obj.x = playArea.xMiddle  
 transition.to (obj, {time=3000, y = \_H + 50})  
  
 obj:addEventListener ( "objetoDestruido", self )  
  
 currentObj = obj  
  
 lastObjNum = self.lastObjNum +1  
 end  
function playArea:objetoDestruido(event)  
 print("event objetoDestruido for" .. event.target.id)  
 Score:updateScore(self.nombre, "normal")  
 print("Before destroying")  
 print(event.target)  
 event.target:removeSelf()  
 event.target = nil  
 print("After destroying")  
 print(event.target)  
 end  
function playArea:touch(event)  
 ...  
  
 if event.phase == "ended" then  
 print(currentObj)  
  
 if (currentObj ~= nil) and (ultimoObj.gesture == gesture) then  
 currentObj:dispatchEvent( { name="objetoDestruido", target=currentObj } )  
 end  
  
 end  
end

And here the messages logged:

1.- touch <2.- table: 0x535af0 <3.- Before destroying --> table: 0x535af0 (event.target)
4.- event objetoDestruido for obj_27
5.- After destroying --> nil (event.target)
6.- touch <7.- table: 0x535af0 <
But this time I get the error above mentioned, and I wonder why is the object on step 7 still not cleansed… Do I have to set some delay in the custom event handler in order to give some time for the object to be removed?.

Runtime error
…an/Dropbox/Desarrollo/CoronaSDK/test2App/PlayArea.lua:183: attempt to call method ‘dispatchEvent’ (a nil value)
stack traceback:

Thanks in advance. [import]uid: 8933 topic_id: 23299 reply_id: 323299[/import]

#2

[code]
function playArea:objetoDestruido(event)
print(“event objetoDestruido for” … event.target.id)
Score:updateScore(self.nombre, “normal”)
print(“Before destroying”)
print(event.target)
if event.target ~= nil then
event.target:removeSelf()
event.target = nil
end
print(“After destroying”)
print(event.target)
end

[code] [import]uid: 114525 topic_id: 23299 reply_id: 93341[/import]

#3

I kind of fixed but still don’t understand why it’s happening that, I set to nil the currentObject just below the dispatch event, so I’m now setting to nil twice, one in the event dispatch and one in the event handler…

If somebody could clarify why is this happening It would be appreciated.

[code]

function playArea:spawn()

local obj = Objeto:new()
obj.id = “obj_” … lastObjNum

playArea:insert(obj)
obj:setReferencePoint ( display.CenterReferencePoint )
obj.x = playArea.xMiddle
transition.to (obj, {time=3000, y = _H + 50})

obj:addEventListener ( “objetoDestruido”, self )

currentObj = obj

lastObjNum = self.lastObjNum +1
end

function playArea:objetoDestruido(event)
print(“event objetoDestruido for” … event.target.id)
Score:updateScore(self.nombre, “normal”)
print(“Before destroying”)
print(event.target)
event.target:removeSelf()
event.target = nil
print(“After destroying”)
print(event.target)
end

function playArea:touch(event)
…

if event.phase == “ended” then
print(currentObj)

if (currentObj ~= nil) and (ultimoObj.gesture == gesture) then
currentObj:dispatchEvent( { name=“objetoDestruido”, target=currentObj } )
currentObj = nil end

end
end

[/code] [import]uid: 8933 topic_id: 23299 reply_id: 93346[/import]