transition.to OnComplete param

Getting Started Newbie Questions
1

Hi, my first transition works but on completion doesn’t call the OnComplete function

[blockcode]
transition.to( crossBar, { time=4000, delay=1000, y=display.contentHeight/3, onComplete=doCrossBarUp} )

local function doCrossBarUp()
print(“doCrossBarUp()”)
transition.to( crossBar, { time=4000, delay=1000, y=-12, onComplete=doCrossBarDown} )
end

local function doCrossBarDown()
transition.to( crossBar, { time=4000, delay=1000, y=display.contentHeight/3, onComplete=doCrossBarUp} )
end

[/blockcode] [import]uid: 9371 topic_id: 3859 reply_id: 303859[/import]

2

your 1st transition doesnt know what your function is yet because it is defined below it.

therefore define your function variable up front. you need to do this when 2 functions call each other since neither can actually be first without referring to the other

[lua]local doCrossBarUp
local doCrossBarDown

transition.to( crossBar, { time=4000, delay=1000, y=display.contentHeight/3, onComplete=doCrossBarUp} )

– note these are actually a local function
– as defined by the variable originally

function doCrossBarUp()
print(“doCrossBarUp()”)
transition.to( crossBar, { time=4000, delay=1000, y=-12, onComplete=doCrossBarDown} )
end

function doCrossBarDown()
transition.to( crossBar, { time=4000, delay=1000, y=display.contentHeight/3, onComplete=doCrossBarUp} )
end[/lua] [import]uid: 6645 topic_id: 3859 reply_id: 11772[/import]

3

Cool, thanks. Is this the best way to implement this type of behaviour? [import]uid: 9371 topic_id: 3859 reply_id: 11775[/import]