电晕+碰撞不起作用

Question

我正在学习 Corona，我正在尝试使用碰撞事件。 以下程序的目标是使用 transition.to 将岩石移向汽车。并打印一行报告发生碰撞的地方。

但是，它不起作用。而且我连enterenter都收不到，请问程序连enter都进不去是什么原因？

我的代码如下。提前谢谢你。

local composer = require( "composer" )
local scene = composer.newScene()


local physics = require "physics"
physics.start(); physics.pause()

local function onLocalCollision( self, event )

if ( event.phase == "began" ) then
    print( self.myName .. ": collision began with " .. event.other.myName )

elseif ( event.phase == "ended" ) then
    print( self.myName .. ": collision ended with " .. event.other.myName )
end
end


local widget = require "widget"

function scene:create( event )
print("entercreate")
local sceneGroup = self.view

local backgrd = display.newImage("background2.png",0,260)
backgrd:scale(3,3)
local car = display.newImage("car2.png",80,270)
physics.addBody(car,"static")
car.myName="Car"

local rock = display.newImage("rock.jpg",520,280)
rock:scale(0.05,0.05)
physics.addBody(rock,"static")
rock.myName="rock"


sceneGroup:insert(backgrd)
sceneGroup:insert(car)
sceneGroup:insert(rock)
transition.to(backgrd,{time=24000, x=-1800,onComplete=endScroll})
transition.to(rock,{time=4000, delay=2500,x=-40})
end

function scene:enter( event )
print("enterenter")
physics.start()
local sceneGroup = self.view
Runtime:addEventListener( "collision", onLocalCollision )
end



scene:addEventListener( "create", scene )
scene:addEventListener( "enter", scene )


return scene

Answer 1

具有本地和全局（运行时）侦听器的工作代码：

local widget = require "widget"
local composer = require( "composer" )
local scene = composer.newScene()

local physics = require "physics"
physics.start()
physics.setGravity( 0,0 )

local function onGlobalCollision( event )
        local target = event.object1
        local other = event.object2

        if ( event.phase == "began" ) then
            print( "GLOBAL: " .. target.name .. ": collision began with " .. other.name )
        elseif ( event.phase == "ended" ) then
            print( "GLOBAL: " .. target.name .. ": collision ended  with " .. other.name )      
        end
    end

local function onLocalCollision( event )
    local target = event.target
    local other = event.other

    if ( event.phase == "began" ) then
        print( "LOCAL: " .. other.name .. ": collision began with " .. target.name )
    elseif ( event.phase == "ended" ) then
        print( "LOCAL: " .. other.name .. ": collision ended  with " .. target.name )       
    end
end

function scene:create( event )
    print("scene:create")


    local sceneGroup = self.view

    local car = display.newRect( 100, 100, 100, 100 )
    car.name = "car"
    physics.addBody( car )

    local rock = display.newRect( 250, 250, 100, 100 )
    rock.name = "rock"
    rock:setFillColor( 0.5, 0.5, 0.5 )
    physics.addBody( rock )
    rock:addEventListener( "collision", onLocalCollision )

    sceneGroup:insert(car)
    sceneGroup:insert(rock)

    transition.to(rock,{time=4000, x = -40, y = -100})

    Runtime:addEventListener( "collision", onGlobalCollision )
end

function scene:enter( event )
    print("scene:enter")    
    local sceneGroup = self.view

end

scene:addEventListener( "create", scene )
scene:addEventListener( "enter", scene )


return scene

您的代码存在的问题是这两个主体是静态的，两个静态主体不能相互碰撞，并且在 composer 中没有任何名为 scene:enter 的东西（这就是它没有被调用的原因因此不是onLocalListener)。

某些体型会（或不会）与其他体型发生碰撞。在 两个物理对象之间的碰撞，至少其中一个对象 必须是动态的，因为这是唯一与 任何其他类型。有关身体的详细信息，请参阅物理身体指南 类型。

https://docs.coronalabs.com/daily/guide/physics/collisionDetection/index.html

以下是有关 Composer API 的一些信息，您可能应该使用 scene:show： https://coronalabs.com/blog/2014/01/21/introducing-the-composer-api-plus-tutorial/