Question

我使用gotoscene从menu.lua转到game.lua。在game.lua结束时，我再次从game.lua过渡到menu.lua。在场景下：在menu.lua中显示我删除游戏场景。当我然后回到game.lua场景中的所有内容：show重复两次。场景：创作仍然只有一次。

知道为什么会这样吗？

谢谢。

function scene:show( event )

    local sceneGroup = self.view
    local phase = event.phase

    if ( phase == "will" ) then

print("does this print once or twice?")



        -- Code here runs when the scene is still off screen (but is about to come on screen)

    elseif ( phase == "did" ) then
    physics.start()
gameLoopTimer = timer.performWithDelay( 1750, gameLoop, 0 )




  -- Start the music!
        audio.play( musicTrack, { channel=1, loops=-1 } )
        audio.setVolume( 0, { channel=1 } ) 


        -- Code here runs when the scene is entirely on screen


    end

end

composer.gotoscene（game.lua）是通过在创建阶段调用的menuDrawer函数创建的多个对象中的一个来调用的。

local function menuDrawer()

....

for i = 1, #menuLetters, 1 do 

....

    local Letterbackground = display.newRoundedRect(sceneGroup, Letterbackgroundx, Letterbackgroundy, 100, 125, 10 )

....
Letterbackground:addEventListener( "tap", gotoGame )
end

永远不会删除EventListener，因为只有函数中的局部变量定义了它。这会导致问题吗？

如果您需要更多信息，请告诉我们。

Answer 1

scene:show有两个阶段相等did和will。所以它确实被称为两次。请参阅下面的代码（它来自Introducing the Composer API）

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

   local sceneGroup = self.view
   local phase = event.phase

   if ( phase == "will" ) then
      -- Called when the scene is still off screen (but is about to come on screen).
   elseif ( phase == "did" ) then
      -- Called when the scene is now on screen.
      -- Insert code here to make the scene come alive.
      -- Example: start timers, begin animation, play audio, etc.
   end
end

Answer 2

问题解决了。 menu.lua中的gotoscene是一个通过点击调用的函数，它由＆＃39; return true＆＃39;在功能结束时。

场景：第二次去场景后秀跑了两次

2 个答案: