Transition inside of a Loop problem

Solar2D General Questions/Discussion
#1

Why can’t I make this work?

I want to make all child with id “s” show the score and make transition to move up, but I can’t seem to find the error or why it is not working.
Thanks :slight_smile:

for i=sceneGroup.numChildren,1, -1 do local child = sceneGroup[i] if child.id == "s" then scorepop = display.newText( { text=child.id3, x=child.x, y=child.y, fontSize=16, align="center" } ) scorepop:setFillColor( 1,1,1 ) transition.to(scorepop, {time=500, alpha=0, y=(child.y-100)}) child:removeSelf() child = nil end end 
#2

it’s because of the number “3”.

text=child.id3

Remove it and everything is correct.

Please check your ide to see what he says about error.

#3

There are no errors it’s just the transition is not firing. Tried your suggestion but still the same…

#4

you type text=child.id ?

#5

Maybe try add parent parameter add make scorepop local variable. Also, remove it after transition completed.

local scorepop = display.newText( { parent=sceneGroup, text=child.id, x=child.x, y=child.y, fontSize=16, align="center", onComplete=display.remove } )

transition.to(scorepop, {time=500, alpha=0.0, y=(scorepop.y-100)})
#6

Tried your code but still Transition is not firing.
The text shows up but the transition is not working or firing 

#7

Try calculating the transition target position first:

[lua]

local newY = child.y  - 100

transition.to(scorepop, {time=500, alpha=0, y=newY})

[/lua]

#8

still the same, I think the problem is that my transition.to is not firing.
even i put the code to:

transition.to(scorepop, {time=500, alpha=0})

it’s still not working

#9

How often are you doing this loop?

#10

are you referring to this?

  1. for i=sceneGroup.numChildren,1, -1 do
  2. local child = sceneGroup[i]
  3. if child.id == “s” then
  4. scorepop = display.newText( { text=child.id3, x=child.x, y=child.y, fontSize=16, align=“center” } )
  5. scorepop:setFillColor( 1,1,1 )
  6. transition.to(scorepop, {time=500, alpha=0, y=(child.y-100)})
  7. child:removeSelf()
  8. child = nil
  9. end
  10. end 
#11

Yes, is it a one-off or a repeated function?

#12

a repated function

#13

How often? Enterframe? Timer?

Try this:

for i=sceneGroup.numChildren,1, -1 do local child = sceneGroup[i] if child.id == "s" then local pop = display.newText( { text=child.id3, x=child.x, y=child.y, fontSize=16, align="center" } ) pop:setFillColor( 1,1,1 ) sceneGroup:insert(pop) local newY = child.y - 100 transition.to(pop, {time=500, alpha=0, y=newY, onComplete = function(obj) display.remove(obj) end} ) display.remove(child) child = nil end end
#14

I’m not sure how removing display objects affect  order of elements of sceneGroup “table”. So maybe try this code

local numChildren = sceneGroup.numChildren for i=numChildren,1, -1 do     local child = sceneGroup[i]     if child.id == "s" then          local scorepop = display.newText( { parent=sceneGroup, text=child.id, x=child.x, y=child.y, fontSize=16, align="center", onComplete=display.remove } )          scorepop:setFillColor( 1,1,1 )          transition.to(scorepop, {time=500, alpha=0.0, y=(scorepop.y-100)})     end  end  for i=numChildren,1, -1 do     local child = sceneGroup[i]     if child.id == "s" then         display.remove( child )         child = nil     end  end

What is color of your background scene? Maybe you don’t see text (transition of scorepop object) because color of text and background are similar (white)?

#15

Should be ok as long as he iterates backwards through the table, which he is doing.

#16

codesbyjandt  why did you still writting the number “3” next to child.id ?

When I copy cut your code and try with child.id, without the “3”, it’s work.

I am sure you didn’t remove it lol.

#17

It has nothing to do with it. It’s a perfectly valid field name. He has an .id field to identify the type and I suspect the .id3 field is used to store the score this object represents.

#18

In his code he never mentions that id+number 3 is a non-empty value. I say it’s equal to “nil”, and the text scorepop show nothing on the screen because of it.

child.id is a string value, but not surely child.id3 (the text field of scorepop must be a string). Put tostring(child.id3), it’s surely better (and got nil !)

#19

He never says that “id” is a non-empty value, either. We don’t have all the code, so we can only assume he has set “id3” somewhere else.

He says that his text does show up, which means it must be non-nil…

#20

Thanks guys finally made it work.

Edited my transition tags and transition.cancel(“tags”) properly changed the sequence order of the codes.