LUA : Scene not being created. What is wrong? - lua

Question

I'm building a game where I have a start screen and clicking the start button it should take me to the FIRST level. Some stuff happens and then I will be taken to the SECOND level.
However I'm running into problems and can't seem to find a solution.
When I click the start button it seems to get stuck in the create function because i prints out something. I was told you don't have to place anything in the create function and just put everything in the SHOW FUNCTION. Was i mislead?
START SCENE
local composer = require("composer")
local widget = require("widget")
local options = {effect = "fade", time = 800}
local startBtn;
local function start(event)
-- load first scene
composer.gotoScene( "level1", options);
startBtn:removeSelf();
print("Start Game")
end
startBtn = widget.newButton(
{
left = 75,
top = 100,
id = "startBtn",
label = "Start",
onEvent = start
}
)
When I click the START button it should take me to the FIRST LEVEL which is here
and is where i'm running into problems.
local composer = require( "composer" );
local scene = composer.newScene();
local widget = require ("widget");
function scene:create( event )
local sceneGroup = self.view;
end
function scene:show( event )
local sceneGroup = self.view
local phase = event.phase
local params = event.params;
print(params);
if (phase == "will") then
print("Will")
elseif (phase == "did") then
print("Did")
local bg = display.newImage ("bg.png",
display.contentCenterX, display.contentCenterY);
------- ALEX KIDD ---------------------------------
local options =
{
frames = {
{ x = 1, y = 2, width = 16, height = 25}, --frame 1
{ x = 18, y = 2, width = 16, height = 25}, --frame 2
{ x = 35, y = 2, width = 16, height = 25}, --frame 3
{ x = 52, y = 2, width = 16, height = 25}, --frame 4
{ x = 1, y = 54, width = 16, height = 24}, --ready1
{ x = 19, y = 54, width = 16, height = 24}, --ready2
{ x = 37, y = 54, width = 29, height = 24}, -- rock
{ x = 67, y = 54, width = 33, height = 24}, -- scissor
{ x = 101, y = 54, width = 33, height = 24}, -- paper
}
};
local sheet = graphics.newImageSheet( "kidd.png", options );
-- Create animation sequence for animation
local seqData = {
{name = "normal", start=1 , count = 4, time = 800},
{name = "faster", frames={1,2,3,4}, time = 400},
{name = "shake", frames={5,6}, time = 500},
{name = "rock", frames={7}},
{name = "paper", frames={9}},
{name = "scissor", frames={8}},
}
local alex = display.newSprite (sheet, seqData);
alex.x = display.contentCenterX-100;
alex.y = display.contentCenterY+83;
alex.anchorX = 1;
alex.anchorY = 1;
---------- JANKEN ---------------------------------
local jankenOpt =
{
frames = {
{x= 154, y= 13, width= 39, height= 48 }, -- shake1
{x= 195, y= 13, width= 39, height= 48 }, -- shake2
{x= 236, y= 13, width= 32, height= 48 }, -- set
{x= 270, y= 13, width= 16, height= 48 }, --r/p/s
{x= 287, y= 13, width= 16, height= 48 }, --r/p/s
{x= 305, y= 13, width= 15, height= 48 }, --r/p/s
{x= 69, y= 13, width= 41, height= 48 }, --flap1
{x= 110, y= 13, width= 40, height= 48 }, --flap2
}
};
local jankenSheet = graphics.newImageSheet( "chars.png", jankenOpt );
-- Create animation sequence janken
local seqDataJanken = {
{name = "flap", frames={7,8}, time = 500},
{name = "shake", frames={1,2}, time = 500},
{name = "set", frames={3}, time = 10, loopCount=1},
}
local janken = display.newSprite (jankenSheet, seqDataJanken);
janken.x = display.contentCenterX+100;
janken.y = display.contentCenterY+83;
janken.anchorX = 1;
janken.anchorY = 1;
-------------- button setup
local btnOpt =
{
frames = {
{ x = 3, y = 2, width=70, height = 22}, --frame 1
{ x = 78, y = 2, width=70, height = 22}, --frame 2
}
};
local buttonSheet = graphics.newImageSheet( "button.png", btnOpt );
local function foo (wow)
alex:play();
janken:play();
end
local function bar (wow)
alex:pause();
janken:pause();
--alex:setFrame(2); --keep it at this frame
-- NEXT: generate more buttons
end
-- Function to handle button event
local function go( event )
-- event.target is the button widget
print (event.phase, event.target.id)
transition.to(alex, {time=2000, x=170, onStart = foo, onComplete = bar})
end
local btnGo = widget.newButton(
{
x = 200,
y = 20,
id = "btnGo",
label = "Go!",
labelColor = { default={ 0, 0, 0 }, over={ 0, 0, 0 } },
sheet = buttonSheet,
defaultFrame = 1,
overFrame = 2,
onPress = go,
}
);
-------------- play buttons
local function shoot (buttonID)
local randomHand = math.random(4,6);
-- position Janken and draw his hands
janken:setSequence("set");
hand = display.newImage (jankenSheet, randomHand, display.contentCenterX+61, display.contentCenterY+60);
if (buttonID == "btnRock") then
alex:setSequence("rock"); -- just show rock for now
elseif (buttonID == "btnScissor") then
alex:setSequence("scissor"); -- just show rock for now
else
alex:setSequence("paper"); -- just show rock for now
end
end
local function play (event)
if (event.phase == "ended") then
alex:setSequence ("shake");
alex:play();
janken:setSequence("shake");
janken:play();
local t = timer.performWithDelay (1500, function() shoot(event.target.id) end, 1);
print (event.target.id); -- which button was it?
end
end
local btnRock = widget.newButton(
{
x = 80,
y = 20,
id = "btnRock",
label = "Rock",
labelColor = { default={ 0, 0, 0 }, over={ 0, 0, 0 } },
sheet = buttonSheet,
defaultFrame = 1,
overFrame = 2,
onEvent = play,
}
);
local btnPaper = widget.newButton(
{
x = 80,
y = 50,
id = "btnPaper",
label = "Paper",
labelColor = { default={ 0, 0, 0 }, over={ 0, 0, 0 } },
sheet = buttonSheet,
defaultFrame = 1,
overFrame = 2,
onEvent = play,
}
);
local btnScissor = widget.newButton(
{
x = 80,
y = 80,
id = "btnScissor",
label = "Scissor",
labelColor = { default={ 0, 0, 0 }, over={ 0, 0, 0 } },
sheet = buttonSheet,
defaultFrame = 1,
overFrame = 2,
onEvent = play,
}
);
local scoreAlex = display.newText ( {text="Alex: 0", x=230, y=60, fontSize=20});
scoreAlex:setFillColor (0,0,0);
scoreAlex.anchorX = 1;
end
end
function scene:hide( event )
local sceneGroup = self.view
local phase = event.phase
if ( phase == "will" ) then
transition.cancel(enemy);
elseif ( phase == "did" ) then
end
end
scene:addEventListener( "create", scene )
scene:addEventListener( "enter", scene )
scene:addEventListener( "hide", scene )
return scene

Answer 1

Well, you are adding a listener scene:addEventListener( "enter", scene ) which should be scene:addEventListener( "show", scene ) (Change enter to show)
Your listener is not even being fired, because it was not added with the correct name.
Composer uses the following events: create, destroy, show, hide.