How to remove an Object after using transition.to ({alpha=0})

Games
1

hi,

The event is triggered by a “touch” Event Listener, and would lead the object’s alpha = 0. Then i want to remove it, but it doesn’t work. would appreciate help in correcting the code

thx

[code]

local fade = function( event )

local phase = event.phase

if “began” == phase then

for i = 1,4 do
transition.to(Rect[i], {time=1000, alpha=0})

if Rect[i].alpha==0 then
Rect[i]:removeSelf() – destroy Rect
end

end
end
end

[/code] [import]uid: 10542 topic_id: 3798 reply_id: 303798[/import]

2

I think for starters, maybe the transition.to should be outside the for loop. [import]uid: 11024 topic_id: 3798 reply_id: 11564[/import]

3

ok this works slightly different to my timer example

note the t2 part is unecessary i just included it to deomonstrate passing parameters on functions as per above
[lua]local fadeComplete=function(obj, t2)
obj:removeSelf()
print(t2.whatever)
end

local Rect={}

for i = 1,4 do
local rect = display.newRect(i*50,50,50,50)
rect:setFillColor(255,0,0)
Rect[i]=rect
local t – need to set define this in advance to be able to pass reference to fn

– doesn’t seem to be any other way to pass
– parameters at the moment
local fn=function()fadeComplete(rect, t) end

t = transition.to(Rect[i], {time=1000, delay=1000*(i-1), alpha=0.5, onComplete=fn })

– something else we can use in the callback
t.whatever=“whatever”
end [/lua]

i thought you’d be able to do this…

[lua]local fn = fadeComplete
fn.whatever = “whatever”[/lua] but it gives an error [import]uid: 6645 topic_id: 3798 reply_id: 11566[/import]

4

turns out the “event” passed to fadeComplete is actually the object undergoing transition… so you can just do this:
[lua]local fadeComplete=function(obj)
obj:removeSelf()
end

local Rect={}

for i = 1,4 do
local rect = display.newRect(i*50,50,50,50)
rect:setFillColor(255,0,0)
Rect[i]=rect
transition.to(Rect[i], {time=1000, delay=1000*(i-1), alpha=0.5, onComplete=fadeComplete })
end [/lua] [import]uid: 6645 topic_id: 3798 reply_id: 11570[/import]

5

Great it worked.

I applied the 2nd code you posted it worked like a charm.

thanks :slight_smile: [import]uid: 10542 topic_id: 3798 reply_id: 11588[/import]