好吧,这个问题有很多答案,但我似乎不能让它工作。我的按钮是在功能场景中创建的:createScene(事件),当我移动到下一个场景时,我正在尝试scenePurge并单独删除按钮,但它似乎不起作用。在下一个场景中,按钮不可见,但如果我按下前一个场景中按钮的位置,它仍然是活动的。清除这些物体的最好方法是什么?
local storyboard = require( "storyboard" )
local scene = storyboard.newScene()
--storyboard.removeScene( "login" )
---------------------------------------------------------------------------------
-- BEGINNING OF YOUR IMPLEMENTATION
---------------------------------------------------------------------------------
local image, image2
-- Called when the scene's view does not exist:
function scene:createScene( event )
local widget = require( "widget" )
local p1ButtonRelease = function( event )
storyboard.gotoScene( "maths_dif", "slideLeft", 1000 )
print("touch")
return true
end
local p2ButtonRelease = function( event )
storyboard.gotoScene( "words", "slideLeft", 1000 )
print("touch")
return true
end
local screenGroup = self.view
image = display.newImage( "images/Background(640x480).png", -20 ,0 )
image2 = display.newImage( "Logo_small.png", 170,0)
--screenGroup:insert( image )
print( "n2: createScene event" )
local p1Button = widget.newButton{
default = "images/SinglePlayer_button.png",
over = "images/SinglePlayer_button.png",
--onPress = button1Press,
onRelease = p1ButtonRelease,
-- fontSize = 20,
-- labelColor = { default={ 255, 250, 250}, over={ 0, 0, 0,} },
-- label = "+",
-- emboss = true
}
local p2Button = widget.newButton{
default = "images/2Player_button.png",
over = "images/2Player_button.png",
--onPress = button1Press,
onRelease = p2ButtonRelease,
-- fontSize = 20,
-- labelColor = { default={ 255, 250, 250}, over={ 0, 0, 0,} },
-- label = "+",
-- emboss = true
}
p1Button.x = 240; p1Button.y = 180
p2Button.x = 240; p2Button.y = 260
end
-- Called immediately after scene has moved onscreen:
function scene:enterScene( event )
print( "2: enterScene event" )
-- remove previous scene's view
storyboard.purgeScene( "login" )
display.remove(p1Button)
-- -- Update Lua memory text display
-- local showMem = function()
image:addEventListener( "touch", image )
-- text3.isVisible = true
-- text2.text = text2.text .. collectgarbage("count")/1000 .. "MB"
-- text2.x = display.contentWidth * 0.5
-- end
-- memTimer = timer.performWithDelay( 1000, showMem, 1 )
end
-- Called when scene is about to move offscreen:
function scene:exitScene()
print( "2: exitScene event" )
storyboard.removeScene("login")
storyboard.removeScene("words")
storyboard.removeScene("guess_word")
storyboard.removeScene("maths_dif")
storyboard.removeScene("scene1")
display.remove(p1Button)
p1Button = nil
display.remove(p2Button)
p2Button = nil
-- remove touch listener for image
image:removeEventListener( "touch", image )
end
-- Called prior to the removal of scene's "view" (display group)
function scene:destroyScene( event )
print( "((destroying scene 2's view))" )
end
---------------------------------------------------------------------------------
-- END OF YOUR IMPLEMENTATION
---------------------------------------------------------------------------------
-- "createScene" event is dispatched if scene's view does not exist
scene:addEventListener( "createScene", scene )
-- "enterScene" event is dispatched whenever scene transition has finished
scene:addEventListener( "enterScene", scene )
-- "exitScene" event is dispatched before next scene's transition begins
scene:addEventListener( "exitScene", scene )
-- "destroyScene" event is dispatched before view is unloaded, which can be
-- automatically unloaded in low memory situations, or explicitly via a call to
-- storyboard.purgeScene() or storyboard.removeScene().
scene:addEventListener( "destroyScene", scene )
---------------------------------------------------------------------------------
return scene
我试图删除对象,这样就不会影响下一个场景,但似乎不能这样做。
有人建议在每个场景开始时使用storyboard.removeAll(),但我个人发现的解决方案是不使用小部件按钮释放函数来改变场景,而是我创建一个图像对象并给它一个EventListener,例如
p1Button = display.newImage("images/SinglePlayer_button.png", 90, 140)
p1Button.touch = onSceneTouch
p1Button:addEventListener("touch", p1Button)
local function onSceneTouch( self, event )
if event.phase == "began" then
storyboard.gotoScene( "words", "slideLeft", 1000 )
return true
end
end
然后在exitScene()函数中删除对象的事件侦听器。在我的下一个场景中,这些先前的按钮没有效果。
您需要将按钮插入场景的视图(组)中。在createScene()函数中,创建按钮后执行:
group:insert(p1Button)
那么你就不用担心删除它们了,storyboard会为你做的