为什么在没有与其他物体接触的情况下发生碰撞？ （Corona SDK作曲家）

Question

这是我的代码。我正在进行3道赛车比赛。这是屏幕截图。

红色汽车与任何其他汽车碰撞时，我进入restart.lua文件，屏幕上点击我回到game.lua文件（代码如下所示） ）。当控制从restart.lua转移回game.lua时会出现问题。

碰撞事件的发生无缘无故导致游戏在重启和game.lua之间不断出现故障和转换。有谁知道为什么会发生这种情况以及如何阻止它？

    local composer = require( "composer" )


local scene = composer.newScene()
local pix=0
local no=0
local physics=require "physics"
physics.start()
local x=2000
local prevP=0
local prevS=5
local count=1
-- -----------------------------------------------------------------------------------------------------------------
-- All code outside of the listener functions will only be executed ONCE unless "composer.removeScene()" is called
-- -----------------------------------------------------------------------------------------------------------------

-- Local forward references should go here

-- -------------------------------------------------------------------------------

local opp1
local opp
local sceneGroup
local roadCopy
local road
local car

function removeAllListeners(self)
  self._functionListeners = nil
  self._tableListeners = nil
end



local function touchScreen(event)
    print("touchScreen")

    if event.x < dw/2 then

        if car.current==car.posB then
            car.x=car.posA
            car.current=car.posA
        elseif car.current == car.posC then
            car.x=car.posB
            car.current=car.posB    
        end
    else

        if car.current==car.posB then
            car.x=car.posC
            car.current=car.posC
        elseif car.current == car.posA then
            car.x=car.posB
            car.current=car.posB    
        end

    end
end

local function removeListeners()
    removeAllListeners(road)
    removeAllListeners(roadCopy)
    removeAllListeners(opp)
    removeAllListeners(car)
    road:removeEventListener("tap",touchScreen)
    roadCopy:removeEventListener("tap",touchScreen)
    car:removeEventListener( "collision",onLocalCollision)
    composer.removeScene( "game")
    composer.gotoScene( "restart")
end
function onLocalCollision( event )
    print( "collision" )
    removeListeners()
end


local function moveRoad(self,event)


    if self.y > dh-20 then
        self.y=20
        pix=pix+10
        if pix > 100 then 
            road.speed=road.speed+1
            roadCopy.speed=roadCopy.speed+1
            pix=0
        else

        end
    else
        self.y=self.y+self.speed 
        pix=pix+1
         if pix > 100 then 
            road.speed=road.speed+1
            roadCopy.speed=roadCopy.speed+1
            pix=0
        else

        end
    end
    if road.speed>30 or roadCopy.speed>30 then
        road.speed=30
        roadCopy.speed=30
    end

end

local function moveoppcar(self, event)
   --to move the incoming cars
    if(self.y==nil)then
        return
    end
    if(self.y>dh) then
        Runtime:removeEventListener( "enterFrame", self )
        self:removeSelf()  
        self=nil 
        randomobject1()

    else

        self.y=self.y+self.speed+roadCopy.speed
    end
end

function randomobject1(event)
    --to randomly generate the incoming cars
    math.randomseed( os.time() )
    opp=display.newRect( center-dw/4.75, 30, dw/8, dw/4.5 )

    local position = math.random(1, 3)
    local cartype = math.random(1, 3)

    if(position==prevP) then
        position=(prevP+2)%3
    end 

    if position==1 then
        opp.x=center-dw/4.75
    end
    if position == 2 then
        opp.x=center
    end
    if position == 3 then
        opp.x=center+dw/4.75
    end
    if cartype == 1 then
        opp.fill={type="image", filename="car_green_1.png"}
    end
    if cartype == 2 then
        opp.fill={type="image", filename="car_blue_1.png"}
    end
    if cartype == 3 then
        opp.fill={type="image", filename="car_red_1.png"}
    end
    opp.speed=math.random(1,10)

    sceneGroup:insert(opp)
    prevP=position
    prevS=opp.speed
    local r=opp.width
    physics.addBody(opp,"static",{density=1, bounce=0.1, friction=0.2,radius=5})
    opp.gravityScale=0
    opp.enterFrame=moveoppcar
    Runtime:addEventListener("enterFrame", opp)
end





-- "scene:create()"
function scene:create( event )
    print("Scene:create")
    sceneGroup = self.view


    ---------ROAD---------
    road=display.newRect( 0, 0, dw, dh )
    road.fill={type="image",filename="road.png"}
    road.anchorX,road.anchorY=0,0
    road.contentHeight=dh
    sceneGroup:insert(road)
    road.speed=5

    roadCopy=display.newRect( 0, 0, dw, dh )
    roadCopy.fill={type="image",filename="road.png"}
    roadCopy.anchorX,roadCopy.anchorY=0,1
    roadCopy.contentHeight=dh
    sceneGroup:insert(roadCopy)
    roadCopy.speed=5


    ----PLAYER CAR--------
    car=display.newRect( dw/2, dh-10, dw/8, dw/4.5 )
    car.fill={type="image", filename="player.png"}
    car.anchorY=1
    center=dw/2
    car.posA=center-dw/4.75
    car.posB=center
    car.posC=center+dw/4.75
    car.current=car.posB
    sceneGroup:insert(car)
    physics.addBody(car,"dynamic",{density=1, bounce=0.1, friction=0.2})
    car.gravityScale=0
    --[[randomobject1()
    randomobject1()]]
end



-- "scene:show()"
function scene:show( event )

    if(event.phase=="did") then
        print("Scene:show")

        addList()
        randomobject1()
        randomobject1()
    end
end


function addList()
    --adding event listeners
    car.collision = onLocalCollision
    car:addEventListener( "collision", car )
    road.enterFrame=moveRoad
    Runtime:addEventListener( "enterFrame", road)
    roadCopy.enterFrame=moveRoad
    Runtime:addEventListener( "enterFrame", roadCopy)
    road:addEventListener("tap",touchScreen)
    roadCopy:addEventListener("tap",touchScreen)
end



-- "scene:hide()"
function scene:hide( event )
    print("Scene:hide")
    local sceneGroup = self.view
    local phase = event.phase

    if ( phase == "will" ) then
        -- Called when the scene is on screen (but is about to go off screen)
        -- Insert code here to "pause" the scene
        -- Example: stop timers, stop animation, stop audio, etc.
    elseif ( phase == "did" ) then
        -- Called immediately after scene goes off screen
    end
end


-- "scene:destroy()"
function scene:destroy( event )
    print("Scene:destroy")
    local sceneGroup = self.view
    -- Called prior to the removal of scene's view
    -- Insert code here to clean up the scene
    -- Example: remove display objects, save state, etc.
end







-- -------------------------------------------------------------------------------

-- Listener setup
scene:addEventListener( "create", scene )
scene:addEventListener( "show", scene )
scene:addEventListener( "hide", scene )
scene:addEventListener( "destroy", scene )


-- -------------------------------------------------------------------------------

return scene

Answer 1

你必须手动删除物理实体。我建议创建一个组并将所有物理实体保存在其中。并在屏幕隐藏时手动删除它。