Lua 如何：将整个函数插入组（场景组）

我知道如何将单个变量放入一个组中，但如果我需要组中的一个函数，以便在制作场景时，我可以将整个函数插入到场景组中，而不是单独输入每个变量，我将如何插入

代码：

场景1.lua:140:错误：应为表。如果这是一个函数调用，则可能使用了“.”而不是“：”

这是我收到的错误消息

我也试过了

sceneGroup:insert(HomeGroup) --- this is without the () at the end, at it still fails to work.

---

如果您有任何想法或知道如何操作，请告诉我。

您不能向显示组添加功能。由于sceneGroup是一个表，与lua中的大部分内容类似，所以可以这样声明主页：

sceneGroup.HomePage = function(params)
    -- code for HomePage
end

如果要通过composer.setVariable和composer.getVariable向composer添加函数，则可以使用此选项

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

-- locals
local testFunc = function(hello)
    print(hello)
end

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

    -- create a variable called "myFuntion" with the value of a reference to testFunc
    composer.setVariable( "myFunction", testFunc )
end


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

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

    if ( phase == "did" ) then
        -- Called when the scene is now on screen.
        composer.getVariable( "myFunction" )("Testing!")
    end
end

-- Listener setup
scene:addEventListener( "create", scene )
scene:addEventListener( "show", scene )

return scene

这将在场景在屏幕上完成动画制作后打印测试

然而，我看不出这样做的目的。如果您想为composer场景创建一个函数，我建议使用这种方法

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

-- local forward references for FUNCTIONS should go here
local myFunction

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

    -- init functions here
    myFunction = function(param)
        print("myFunction says "..param)
    end
end


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

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

    if ( phase == "did" ) then
        -- Called when the scene is now on screen.
        myFunction("hello")
    end
end

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

    local sceneGroup = self.view

    -- remove your scene's functions here
    myFunction = nil
end

-- Listener setup
scene:addEventListener( "create", scene )
scene:addEventListener( "show", scene )
scene:addEventListener( "destroy", scene )

return scene

正如您所看到的，myFunction可以在整个场景中调用，没有任何问题。此示例将打印myFunction在场景在屏幕上完成动画制作后说hello

希望这有帮助

---

Joe。

谢谢Joe，我现在明白了，并且正在向我的应用程序迈进，我比问这个问题之前更了解作曲家场景的工作原理。似乎根本不需要将函数添加到sceneGroup中即可使程序正常工作：

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

-- local forward references for FUNCTIONS should go here
local myFunction

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

    -- init functions here
    myFunction = function(param)
        print("myFunction says "..param)
    end
end


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

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

    if ( phase == "did" ) then
        -- Called when the scene is now on screen.
        myFunction("hello")
    end
end

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

    local sceneGroup = self.view

    -- remove your scene's functions here
    myFunction = nil
end

-- Listener setup
scene:addEventListener( "create", scene )
scene:addEventListener( "show", scene )
scene:addEventListener( "destroy", scene )

return scene