Need help with composer

[rijulgulati96]

Hello, 

Please have a look at the code below: 

---

local function creditScreen (event) 

local obj = event.target

if event.phase ==“ended” 

then

obj:removeSelf()

obj=nil

button1:removeSelf()

button1=nil

button2:removeSelf()

button2=nil

composer.gotoScene(“credits”, “fade” ,500 )

end

return

end

button3 = widget.newButton

{

    label = “button3”,

    onEvent = creditScreen,

    emboss = true,

    shape=“roundedRect”,

    fontSize=25,

   cornerRadius = 20,

    fillColor = { default={0,0.95,0,0.7}, over={ 0.5,0.22,0,0.7 } },

    strokeColor = { default={ 0.5,0.22,0,1 }, over={ 0,1,0,1 } },

    strokeWidth =3,

    labelColor = { default={ 1, 1, 1,1 }, over={ 0, 1, 0, 1 } },

}

button3.x=v.centerX 

button3.y = v.centerY+320

button3:setLabel( “Credits” )

button3:scale(1.7,1.5)

---

Now when I click on “credit” button, an error flashes up. (Please see the error image attachment)

I have gone through the code in “events.lua” and seems fine to me (I mean the composer format and all is fine)

Also, I created a similar button which on-clicking switches to new screen; and it works perfect.

What does this error mean (as shown in attachment)??

Help please? 

[nick_sherman]

Firstly, if you insert obj, button1, button2 into the scene view, you don’t need to remove and nil them manually.

Is this code from events.lua? If you are going to a scene called credits, the file must be called credits.lua.

[rijulgulati96]

No no … the above code is from “mainscreen.lua” . The mainscreen has a button named ‘credits’. When we press this button, credits.lua is opened. (For that I have called function creditScreen() )

[nick_sherman]

Try

[lua]

composer.gotoScene(“credits”, {effect = “fade” ,time = 500})

[/lua]

If that doesn’t work, post credits.lua as it might be a syntax error on that file.

[rijulgulati96]

It didn’t work either … Here is the credit.lua code:

---

local composer = require(“composer”)

local widget = require( “widget” )

display.setStatusBar(display.HiddenStatusBar)

---

local grp= {} 

grp.main = display.newGroup() 

grp.screen =display.newGroup() 

local scene = composer.newScene()

local v = {}

v.centerX  = display.contentCenterX

v.centerY = display.contentCenterY

local gfx = {} 

composer.removeScene(“mainscreen”)

---

local function back(event) 

local obj2 = event.target

if event.phase ==“ended” 

then

obj2:removeSelf()

obj2=nil

composer.gotoScene( “mainscreen” )

end

end

---

local bg, textdisp, textdispName,textdispName2, img

function scene:create(event)

grp.main  = self.view

bg= display.newImageRect(grp.screen, “bgjpg.jpg”,1600, 1000)

bg.x=v.centerX

bg.y=v.centerY

bg.alpha=0.5

textdisp=display.newText( grp.screen, “THANKS TO :\n\n”, 0, 0, “native.systemFontBold”, 60 )

textdisp.x=v.centerX

textdisp.y=v.centery-150

textdispName = display.newText( grp.screen, “- (Name)\n\n\n”, 0, 0, “native.systemFontBold”, 40 )

textdispName.x=v.centerX

textdispName.y=v.centerY-250

textdispName2 = display.newText(grp.screen,  "Game created by : ", 0, 0, “native.systemFontBold”, 60 )

textdispName2.x=v.centerX

img=display.newImage(grp.screen,“logopng.png”)

img.x=v.centerX

img.y=v.centerY

gfx.img=img

button3 = widget.newButton

{

    label = “button”,

    onEvent = back,

    emboss = true,

    

    shape=“roundedRect”,

    fontSize=25,

    cornerRadius = 20,

    fillColor = { default={0,0.95,0,0.6}, over={ 0.5,0.22,0,0.7 } },

    strokeColor = { default={ 0.5,0.22,0,1 }, over={ 0,1,0,1 } },

    strokeWidth =3,

    labelColor = { default={ 1, 1, 1,1 }, over={ 0, 1, 0, 1 } },

}

button3.x=v.centerX

button3.y = v.centerY + 185

button3:setLabel( “<-- Back” )

button3:scale(2,2)

grp.main:insert(grp.screen)

end

function scene:show( event )

grp.main = self.view

local phase = event.phase

if phase==“did” 

then

trans=transition.blink (gfx.img, {time=1000})

end

end

function scene:hide(event)

grp.main = self.view

local phase=event.phase

if phase==“will”

then

transition.cancel(trans)

end

end

function scene:destroy( event )

grp.main = self.view

print( “((Destroyed credits view))” )

end

---

scene:addEventListener( “create”, scene )

scene:addEventListener( “show”, scene )

scene:addEventListener( “hide”, scene )

scene:addEventListener( “destroy”, scene )

---

return scene

---

What I think is the error comes on entering the scene “credits.lua”. 

Please help.

[nick_sherman]

The only error I can see at first glance is ‘textdisp.y=v.centery-150’ - lowercase ‘Y’ instead of uppercase.

[rijulgulati96]

That was my bad … I figured out this mistake while posting the code here and rectified it.

But, no luck. The same error flashes every time!

What exactly does this error mean? I mean in what situation(s) does this error flash? 

[nick_sherman]

It’s not really clear. You should get a more detailed error message in the console rather than this popup. Anything in there?

[rijulgulati96]

Okay … so … now what I did is created a new lua file, named it is “creds.lua” , copied the entire “credit.lua” file into it (as it is), linked the file in composer, and it worked

I don’t know how, but it worked. Any idea how this happened? I mean … is ‘credits’ an already reserved word in lua library? Or something like that? Because I did not make any additional changes in “creds.lua” file … but it worked

[rob]

There used to be an internal library named “credits”.  I always use the name “gamecredits.lua”

Rob

[rijulgulati96]

Oh okay… thanks!

[nick_sherman]

Firstly, if you insert obj, button1, button2 into the scene view, you don’t need to remove and nil them manually.

Is this code from events.lua? If you are going to a scene called credits, the file must be called credits.lua.

[rijulgulati96]

No no … the above code is from “mainscreen.lua” . The mainscreen has a button named ‘credits’. When we press this button, credits.lua is opened. (For that I have called function creditScreen() )

[nick_sherman]

Try

[lua]

composer.gotoScene(“credits”, {effect = “fade” ,time = 500})

[/lua]

If that doesn’t work, post credits.lua as it might be a syntax error on that file.

[rijulgulati96]

It didn’t work either … Here is the credit.lua code:

---

local composer = require(“composer”)

local widget = require( “widget” )

display.setStatusBar(display.HiddenStatusBar)

---

local grp= {} 

grp.main = display.newGroup() 

grp.screen =display.newGroup() 

local scene = composer.newScene()

local v = {}

v.centerX  = display.contentCenterX

v.centerY = display.contentCenterY

local gfx = {} 

composer.removeScene(“mainscreen”)

---

local function back(event) 

local obj2 = event.target

if event.phase ==“ended” 

then

obj2:removeSelf()

obj2=nil

composer.gotoScene( “mainscreen” )

end

end

---

local bg, textdisp, textdispName,textdispName2, img

function scene:create(event)

grp.main  = self.view

bg= display.newImageRect(grp.screen, “bgjpg.jpg”,1600, 1000)

bg.x=v.centerX

bg.y=v.centerY

bg.alpha=0.5

textdisp=display.newText( grp.screen, “THANKS TO :\n\n”, 0, 0, “native.systemFontBold”, 60 )

textdisp.x=v.centerX

textdisp.y=v.centery-150

textdispName = display.newText( grp.screen, “- (Name)\n\n\n”, 0, 0, “native.systemFontBold”, 40 )

textdispName.x=v.centerX

textdispName.y=v.centerY-250

textdispName2 = display.newText(grp.screen,  "Game created by : ", 0, 0, “native.systemFontBold”, 60 )

textdispName2.x=v.centerX

img=display.newImage(grp.screen,“logopng.png”)

img.x=v.centerX

img.y=v.centerY

gfx.img=img

button3 = widget.newButton

{

    label = “button”,

    onEvent = back,

    emboss = true,

    

    shape=“roundedRect”,

    fontSize=25,

    cornerRadius = 20,

    fillColor = { default={0,0.95,0,0.6}, over={ 0.5,0.22,0,0.7 } },

    strokeColor = { default={ 0.5,0.22,0,1 }, over={ 0,1,0,1 } },

    strokeWidth =3,

    labelColor = { default={ 1, 1, 1,1 }, over={ 0, 1, 0, 1 } },

}

button3.x=v.centerX

button3.y = v.centerY + 185

button3:setLabel( “<-- Back” )

button3:scale(2,2)

grp.main:insert(grp.screen)

end

function scene:show( event )

grp.main = self.view

local phase = event.phase

if phase==“did” 

then

trans=transition.blink (gfx.img, {time=1000})

end

end

function scene:hide(event)

grp.main = self.view

local phase=event.phase

if phase==“will”

then

transition.cancel(trans)

end

end

function scene:destroy( event )

grp.main = self.view

print( “((Destroyed credits view))” )

end

---

scene:addEventListener( “create”, scene )

scene:addEventListener( “show”, scene )

scene:addEventListener( “hide”, scene )

scene:addEventListener( “destroy”, scene )

---

return scene

---

What I think is the error comes on entering the scene “credits.lua”. 

Please help.

[nick_sherman]

The only error I can see at first glance is ‘textdisp.y=v.centery-150’ - lowercase ‘Y’ instead of uppercase.

[rijulgulati96]

That was my bad … I figured out this mistake while posting the code here and rectified it.

But, no luck. The same error flashes every time!

What exactly does this error mean? I mean in what situation(s) does this error flash? 

[nick_sherman]

It’s not really clear. You should get a more detailed error message in the console rather than this popup. Anything in there?

[rijulgulati96]

Okay … so … now what I did is created a new lua file, named it is “creds.lua” , copied the entire “credit.lua” file into it (as it is), linked the file in composer, and it worked

I don’t know how, but it worked. Any idea how this happened? I mean … is ‘credits’ an already reserved word in lua library? Or something like that? Because I did not make any additional changes in “creds.lua” file … but it worked

[rob]

There used to be an internal library named “credits”.  I always use the name “gamecredits.lua”

Rob