场景：第二次出现在场景中后显示两次

Question

我使用gotoscene从menu.lua转到game.lua。在game.lua结束时，我再次从game.lua转换到menu.lua。在场景下：在menu.lua中显示我删除游戏场景。当我回到game.lua场景中的所有内容时：show重复两次。场景：创造仍然只有一次。

任何想法，为什么会这样？

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）由抽头通过此它们是在创建阶段称为menuDrawer函数创建的多个对象中的一个调用。

local function menuDrawer() 

.... 

for i = 1, #menuLetters, 1 do 

.... 

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

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

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

如果您需要更多信息，请让我知道。

Answer 1

问题解决了。 menu.lua中的gotoscene被一个叫做tap的函数所调用，并且在函数的结尾被'return true'修复。

Answer 2

scene:show有两个相位等于did和will。所以它确实被称为两次。见下面的代码（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