How can I spawn objects?

Getting Started Newbie Questions
#1

How can I make an object spawn using one button and have another button that makes it disappear

using this button code

local widget = require( "widget" ) -- Function to handle button events local function handleButtonEvent( event ) if ( "ended" == event.phase ) then print( "Button was pressed and released" ) end end local button = widget.newButton( { width = 100, height = 50, defaultFile = "images/pause.png", overFile = "images/pause.png", label = "", onEvent = handleButtonEvent } ) -- Center the button resume.x = 17 resume.y = 30 -- Change the button's label text button:setLabel( "Push" ) sceneGroup:insert(button)
#2

Simple

Add

local myImage = display.newImageRect(“image.png”, 50,50)

Inside the handleButtonEvent which you want the image to disappear

if event.phase == “ended” and myImage.alpha ~= 0 then
myImage.alpha = 0
end

Inside the handleButtonEvent which you want the image to reappear

if event.phase == “ended” and myImage.alpha ~= 1 then
myImage.alpha = 1
end

Hope this helps

#3

Thanks a lot man, I have another question, this is probably more complicated. Could I make it that when I entered the scene, the object wasn’t already there, rather I have to spawn it in for it to be there? Also is there a way I could make the button have a limited number of spawns, i.e can only spawn in 3 objects then the button stops spawning more in?

Cheers

#4

Remove myImage and put

local myObjs = {}

In the third button listener
if #myObjs ~= 3 then

myObjs= display.newImageRect(“image.png” ,50,50)

end

If you wanted to hide all Image the button handler should be updated

if event.phase == “ended” and myObjs[1].alpha ~= 0 then

for i =1,#myObjs do
myObjs[i].alpha=0
end

end

Make the images reappear by changing the other button handler

if event.phase == “ended” and myObjs[1].alpha ~= 1 then

for i =1,#myObjs do
myObjs[i].alpha=1
end

end

#5

Sorry I’m not following, could you do an example using the template I provided?

Cheers

#6

Also, when I spawn the object back in it spawns back in the same place as it despawned, how can I make it go back to the original position?

#7

here you go

#8

Sorry if I’m starting to bother you, but its just not working sorry, could you just put it in the template I have attached with this reply, that would be great, using the eggplant as the image.

If you scroll down about halfway there will be a big empty space where you can but the button, no worries if you don’t feel like helping.

#9

Simple

Add

local myImage = display.newImageRect(“image.png”, 50,50)

Inside the handleButtonEvent which you want the image to disappear

if event.phase == “ended” and myImage.alpha ~= 0 then
myImage.alpha = 0
end

Inside the handleButtonEvent which you want the image to reappear

if event.phase == “ended” and myImage.alpha ~= 1 then
myImage.alpha = 1
end

Hope this helps

#10

Thanks a lot man, I have another question, this is probably more complicated. Could I make it that when I entered the scene, the object wasn’t already there, rather I have to spawn it in for it to be there? Also is there a way I could make the button have a limited number of spawns, i.e can only spawn in 3 objects then the button stops spawning more in?

Cheers

#11

Remove myImage and put

local myObjs = {}

In the third button listener
if #myObjs ~= 3 then

myObjs= display.newImageRect(“image.png” ,50,50)

end

If you wanted to hide all Image the button handler should be updated

if event.phase == “ended” and myObjs[1].alpha ~= 0 then

for i =1,#myObjs do
myObjs[i].alpha=0
end

end

Make the images reappear by changing the other button handler

if event.phase == “ended” and myObjs[1].alpha ~= 1 then

for i =1,#myObjs do
myObjs[i].alpha=1
end

end

#12

Sorry I’m not following, could you do an example using the template I provided?

Cheers

#13

Also, when I spawn the object back in it spawns back in the same place as it despawned, how can I make it go back to the original position?

#14

here you go

#15

Sorry if I’m starting to bother you, but its just not working sorry, could you just put it in the template I have attached with this reply, that would be great, using the eggplant as the image.

If you scroll down about halfway there will be a big empty space where you can but the button, no worries if you don’t feel like helping.