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我正在爲Lua中的編程課程開發遊戲。但是，我無法讓game_over場景顯示。顯然它實際上是在展示，但在所有事情的背後。但是，我需要實際的場景完全消失，所以當我回到主屏幕時，我可能會從頭開始再次開始遊戲。我嘗試過不同的方法，但似乎沒有任何工作。有什麼建議麼？在Lua中展示Game Over場景
這是我的代碼。
------------------------------------------------------------------------------
---
--
-- play.lua
--
---------------------------------------------------------------------------------
local sceneName = ...
local composer = require("composer")
-- Load scene with same root filename as this file
local scene = composer.newScene(sceneName)
---------------------------------------------------------------------------------
local widget = require("widget")
local back
local score = 0 -- ****************
-- ***************************
local function finish_alien()
if score > 1 then
composer.showOverlay("game_over")
audio.pause(1)
end
end
local function tap_back(event)
composer.gotoScene("home", {effect="slideLeft", time=400})
end
--------------------------------------------------------------------
-- Create a couple loaded sounds to be used for game events.
--------------------------------------------------------------------
local explosion_sound = audio.loadSound("images/sound_k.mp3")
local miss_sound = audio.loadSound("images/sound_fail.wav")
--------------------------------------------------------------------
--The code above creates two loaded sounds: explosion_sound and miss_sound. The next step is to find a place in the code to play these sounds.
--For the miss_sound add the following code.
--------------------------------------------------------------------
-- use this to handle touch events on the background. This will catch touches that
-- miss an alien.
--------------------------------------------------------------------
local function touch_background(event)
if event.phase == "began" then
audio.play(miss_sound)
end
end
Runtime:addEventListener("touch", touch_background)
--------------------------------------------------------------------
local alien_sheet = graphics.newImageSheet("images/aliens2.png", {width=30, height=50, numFrames=40})
local explosion_sheet = graphics.newImageSheet("images/explosion-boom.png", {width=50, height=50, numFrames=10})
local function remove_explosion(event)
if event.phase == "ended" then
display.remove(event.target)
end
end
local function make_explosion()
local explosion_sprite = display.newSprite(explosion_sheet, {start=1, count=40, loopCount=1})
explosion_sprite:addEventListener("sprite", remove_explosion)
explosion_sprite:play()
return explosion_sprite
end
function remove_alien(alien_sprite)
display.remove(alien_sprite)
end
-------------------------------------------------------------------------------------
-- Touch event occurs on alien sprite
-------------------------------------------------------------------------------------
local function touch_alien(event)
if event.phase == "began" then
local explosion_sprite = make_explosion()
explosion_sprite.x = event.target.x
explosion_sprite.y = event.target.y
remove_alien(event.target)
audio.play(explosion_sound) -- Play explosion sound
score = score + 1 -- score *************
finish_alien() -- **********************
end
return true -- prevent touch event propagation
end
-------------------------------------------------------------------------------------
local function reset_zep(zep)
zep.x = -100
zep.y = math.random(50, 250)
transition.to(zep, {x=display.contentWidth + 100, time=10000, onComplete= reset_zep})
end
-------------------------------------------------------------------------------------
-- Tried to make the Game Over scene appear with this function, but I don't know if it's actually correct.
-------------------------------------------------------------------------------------
function scene:create(event)
local group = self.view
local background = display.newImageRect("images/sky.jpg", 600, 600)
background.alpha = 1
background.x = 240
background.y = 160
local city = display.newImageRect("images/skyline.png", 480, 320)
background.alpha = 1
city.x = 240
city.y = 260
local zep1 = display.newImageRect("images/zeppelin.png", 225, 100)
zep1.alpha = 1
zep1.x = -200
zep1.y = 100
transition.to(zep1, {x=display.contentWidth + 100, alpha=1, time=80000, onComplete=reset_zep})
local zep2 = display.newImageRect("images/zeppelin.png", 75, 34)
zep2.alpha = 1
zep2.x = -250
zep2.y = 160
transition.to(zep2, {x=display.contentWidth + 100, time=80000, delay=2000, onComplete=reset_zep})
--------------------------------------------------------------------
-- This block of code adds a streaming sound and a button to play and resume that sound.
--------------------------------------------------------------------
local background_sound = audio.loadStream("images/sound_bg.wav")
audio.play(background_sound, {channel=1, loops=-1})
local play_pause_button = display.newImage("images/speaker.png")
play_pause_button.x = 32
play_pause_button.y = 32
local sound_state = "on"
local function set_sound_state(event)
if event.phase == "began" then
if sound_state == "on" then
sound_state = "off"
audio.pause(1)
else
sound_state = "on"
audio.resume(1)
end
end
return true
end
play_pause_button:addEventListener("touch", set_sound_state)
--------------------------------------------------------------------
-------------------------------------------------------------------------------------
-- This function makes aliens from the sprite sheet
-------------------------------------------------------------------------------------
local function make_alien()
local n = math.random(0, 3) * 10 + 1
local alien_sprite = display.newSprite(alien_sheet, {start=n, count=10, loopCount=0, time=2000})
alien_sprite:play()
alien_sprite.x = -40
alien_sprite.y = math.random(40, 280)
transition.to(alien_sprite, {time=3300, x=520, onComplete=remove_alien})
-- Add a touch event to each alien sprite.
alien_sprite:addEventListener("touch", touch_alien)
if score > 1 then
alien_sprite:removeSelf()
end
end
local alien_timer = timer.performWithDelay(1000, make_alien, 0)
end
function scene:show(event)
local group = self.view
end
function scene:hide(event)
local group = self.view
composer.removeScene("play")
end
function scene:destroy(event)
local group = self.view
end
---------------------------------------------------------------------------------
-- Listener setup
scene:addEventListener("create", scene)
scene:addEventListener("show", scene)
scene:addEventListener("hide", scene)
scene:addEventListener("destroy", scene)
---------------------------------------------------------------------------------
return scene