Two balls function

Getting Started Newbie Questions
#21

What custom property ?

#22

Call the fuctions Ball1.handleTap and Ball2.handleTap

You cannot call 2 the function the same name

And of course change the event listener accordingly.

#23

it still doesn’t work . when I click one both disappear .

#24

I’m getting this error 

Runtime error

C:\Users\Brandon\Documents\Corona Projects\StopTheBall\storyboard.lua:1641: C:\U

sers\Brandon\Documents\Corona Projects\StopTheBall\game8.lua:89: attempt to inde

x global ‘Ball2’ (a nil value)

stack traceback:

        [C]: in function ‘error’

        C:\Users\Brandon\Documents\Corona Projects\StopTheBall\storyboard.lua:16

41: in function ‘gotoScene’

        C:\Users\Brandon\Documents\Corona Projects\StopTheBall\restart7.lua:43:

in function <C:\Users\Brandon\Documents\Corona Projects\StopTheBall\restart7.lua

:41>

        ?: in function <?:221>

#25 
-- create image of a ball Ball1 = display.newCircle(100, 100, 10) physics.addBody(Ball1, "dynamic", {friction=2}) Ball1:applyLinearImpulse(-.05, .05, 0, 0) Ball1:setStrokeColor( 0, 3, 0 ) screenGroup:insert(Ball1) -- create image of a ball Ball2 = display.newCircle(100, 100, 10) physics.addBody(Ball2, "dynamic", {friction=2}) Ball2:applyLinearImpulse(-.05, .05, 0, 0) screenGroup:insert(Ball2)

 function Ball1.handleTap( event ) Ball1 = remove.self() Ball1 = nil end function Ball2.handleTap( event ) --line 89 where the problem is Ball2 = remove.self() Ball2 = nil end
#26

I think i see your problem. You either need to set a small timer or you need to set focus. Here is both method’s.

SETFOCUS –

local Ball1 = display.newCircle( 100, 100, 10 ) Ball1:setFillColor( 1, 0, 0 ) local Ball2 = display.newCircle( 100, 100, 10 ) function removeBall1(event) if event.phase == "ended" then display.remove(Ball1) Ball1:removeEventListener( "touch", removeBall1 ) end end local function removeBall2(event) if event.phase == "began" then display.getCurrentStage():setFocus( event.target ) elseif event.phase == "ended" then display.remove(Ball2) Ball2:removeEventListener( "touch", removeBall2 ) Ball1:addEventListener( "touch", removeBall1 ) display.getCurrentStage():setFocus(nil) end end Ball2:addEventListener( "touch", removeBall2 )

TIMER –

local Ball1 = display.newCircle( 100, 100, 10 ) Ball1:setFillColor( 1, 0, 0 ) local Ball2 = display.newCircle( 100, 100, 10 ) function removeBall1(event) if event.phase == "ended" then display.remove(Ball1) Ball1:removeEventListener( "touch", removeBall1 ) end end local function removeBall2(event) if event.phase == "began" then display.getCurrentStage():setFocus( event.target ) elseif event.phase == "ended" then display.remove(Ball2) Ball2:removeEventListener( "touch", removeBall2 ) local function addLis() Ball1:addEventListener( "touch", removeBall1 ) end timer.performWithDelay( 10, addLis, 1 ) end end Ball2:addEventListener( "touch", removeBall2 )

I’d stick with the setFocus method though. 

#27

Will this fix my problem ?

#28

Well there is only one way to find out. Give it a go. 

#29

It works (Thanks :slight_smile: ) but how do I make it go to another scene when both balls are clicked ?

#30

Just use the gotoScene and put it into the function that removes the second ball. 

#31

I tried but it didn’t work . and since I put in the go to scene whenever I click the first ball , it goes into the other scene . 

#32

Referring to my code. 

function removeBall1(event) if event.phase == "ended" then display.remove(Ball1) Ball1:removeEventListener( "touch", removeBall1 ) --Put gotoScene here. end end
#33

But I thought you said i have to put it in the function that takes out the second ball ?

#34

That does take the second ball. I just named them incorrectly. Sorry.

#35

If I touch the balls while it’s in the air nothing happens . I have to wait till they stay on the floor and as soon as I touch the second ball , it goes into the next scene . 

function removeBall1(event) if event.phase == "ended" then display.remove(Ball1) Ball1:removeEventListener( "touch", removeBall1 ) end end function removeBall2(event) if event.phase == "began" then display.getCurrentStage():setFocus( event.target ) elseif event.phase == "ended" then display.remove(Ball2) storyboard.gotoScene("game9", "fade", 400) Ball2:removeEventListener( "touch", removeBall2 ) Ball1:addEventListener( "touch", removeBall1 ) storyboard.gotoScene("game9", "fade", 400) display.getCurrentStage():setFocus(nil) end end function scene:enterScene(event) Ball2:addEventListener( "touch", removeBall2 ) end
#36

If I touch the balls it has no effect . I have to wait for them to completely stop moving to touch them and get an effect 

#37

Never mind they work