場景：第二次出現在場景中後顯示兩次

Question

我使用gotoscene從menu.lua轉到game.lua。在game.lua結束時，我再次從game.lua轉換到menu.lua。在場景下：在menu.lua中顯示我刪除遊戲場景。當我回到game.lua場景中的所有內容時：show重複兩次。場景：創造仍然只有一次。

任何想法，爲什麼會這樣？

謝謝。

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）由抽頭通過此它們是在創建階段稱爲menuDrawer函數創建的多個對象中的一個調用。

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不會被刪除，因爲只有函數中的局部變量定義了EventListener。這會導致問題嗎？

如果您需要更多信息，請讓我知道。

Answer 1

問題解決了。 menu.lua中的gotoscene被一個叫做tap的函數所調用，並且在函數的結尾被'return true'修復。

Answer 2

scene:show有兩個相位等於did和will。所以它確實被稱爲兩次。見下面的代碼（它來自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