我正在为Lua的编程课开发游戏。但是，我无法进行game_over场景秀。显然它实际上是在显示，但在所有事物的后面。但是，我需要将实际场景完全消失，这样当我回到主屏幕时，我可能会从头开始重新开始游戏。我尝试过不同的方法，但似乎没什么用。有什么建议吗？
这是我的代码。
------------------------------------------------------------------------------
---
--
-- 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
答案 0 :(得分：0)
如果您打算使用像Composer这样的场景管理器，您需要让它管理您的场景。例如，查看场景：create（）函数。您可以创建所有这些display.newImage（）和display.newImageRect（）调用，但是您永远不会将它们放入场景的“视图”（即它的显示组）。
每个项目都应该包含：
local background = display.newImageRect( "images/sky.jpg", 600, 600 )
background.alpha = 1
background.x = 240
background.y = 160
group:insert( background )
然后您的场景管理员可以根据需要在屏幕上和屏幕外转换内容。您还在场景外创建对象：create（）。也需要插入场景的视图组，或者在更改场景之前必须删除它们。