我的代码在我的模块脚本 Roblox 中找不到函数

Question

我在 Roblox 中编写 2D 游戏引擎是为了好玩，但我遇到了运行问题。看来我的代码找不到我引用的函数。

我的输出是：

Players.SpookyDervish.PlayerGui.SpookyEngine.SpookyEngine:31: attempt to call a nil value

我有 3 个模块脚本和一个主脚本。

这是我的浏览器 window：

主脚本：

local gui = script.Parent

local spookyEngine = require(gui:WaitForChild("SpookyEngine"))

spookyEngine.Init()

spookyEngine:CreateObject("TestObject", Vector2.new(0, 0), Vector2.new(50, 50), "rbxassetid://183598555", Color3.fromRGB(85, 170, 255))

wait(2)

spookyEngine:Transform("test", Vector2.new(50, 50), Vector2.new(50, 50), 0)

我的 SpookyEngine 模块：

local object = require(script:WaitForChild("Object"))
local input = require(script:WaitForChild("Input"))

local gui = script.Parent

local spookyEngine = {}

function spookyEngine.Init()
    spookyEngine.screen = Instance.new("Frame", gui)
    spookyEngine.screen.Name = "Screen"
    spookyEngine.screen.Position = UDim2.new(0.5, 0, 0.5, 0)
    spookyEngine.screen.Size = UDim2.new(1.25, 0, 1.25, 0)
    spookyEngine.screen.AnchorPoint = Vector2.new(0.5, 0.5)
    spookyEngine.screen.BackgroundColor3 = Color3.fromRGB(0, 0, 0)
    spookyEngine.screen.BorderSizePixel = 0
    spookyEngine.screen.BorderColor3 = Color3.fromRGB(0, 0, 0)
    
    object.Init()
    spookyEngine.objects = object.objects
    
    game.StarterGui:SetCoreGuiEnabled(Enum.CoreGuiType.All, false)
    
    print("INFO: Initialized SpookyEngine!")
end

function spookyEngine:CreateObject(name, pos, size, sprite, colour)
    object.New(name, pos, size, sprite, colour)
end

function spookyEngine:Transform(object, pos, size, rotation)
    object:Transform(nil, nil, nil, nil)
end

return spookyEngine

我的对象模块：

local spookyEngine = script.Parent
local gui = spookyEngine.Parent

local Object = {}
Object.__index = Object

function Object.Init()
    local Objects = Instance.new("Folder", gui.Screen)
    Objects.Name = "Objects"
    
    Object.objects = Objects
end

function Object.New(name, pos, size, sprite, colour)
    local newObject = {}
    setmetatable(newObject, Object)
    
    local position = UDim2.new(0.5, pos.X, 0.5, pos.Y)
    local objectSize = UDim2.new(0, size.X, 0, size.Y)
    
    local newObjectInstance = Instance.new("Frame", Object.objects)
    newObjectInstance.Name = name
    newObjectInstance.Position = position
    newObjectInstance.Size = objectSize
    newObjectInstance.BackgroundColor3 = colour
    newObjectInstance.AnchorPoint = Vector2.new(0.5, 0.5)
    newObjectInstance.BorderSizePixel = 0
    
    if sprite ~= nil then
        local objectSprite = Instance.new("ImageLabel", newObjectInstance)
        objectSprite.Size = UDim2.new(1, 0, 1, 0)
        objectSprite.Name = "Sprite"
        objectSprite.Image = sprite
        objectSprite.BackgroundTransparency = 1
        objectSprite.BackgroundColor3 = colour
        newObjectInstance.BackgroundTransparency = 1
    end
    
    newObject.Name = name
    newObject.Position = position
    newObject.Size = objectSize
    newObject.Sprite = sprite
    newObject.Colour = colour
    newObject.Instance = newObjectInstance
    
    return newObject
end

function Object:Transform(object, pos, size, rotation)
    object = tostring(object)   

    if Object.objects:FindFirstChild(object) then

    else
        warn("ERROR: Cant find object with name: '"..object.."'")
    end
end

return Object

如有任何帮助，我们将不胜感激！

Answer 1

你的错误指向这一行：

function spookyEngine:Transform(object, pos, size, rotation)
    object:Transform(nil, nil, nil, nil)
end

调用者...

spookyEngine:Transform("test", Vector2.new(50, 50), Vector2.new(50, 50), 0)

因为您有一个名为 object 的函数参数，它隐藏了您用来定义模块的 object 局部变量。所以你传入的字符串就是被使用的字符串。所以你实际上是在尝试执行

string.Transform("test", nil, nil, nil, nil)

lua 字符串库没有名为 Transform 的函数，因此当您尝试索引该函数时，它返回为 nil。这就是您收到错误 attempt to call a nil value.

的原因

由于您打算使用模块中的 Object:Transform 函数，因此简单的解决方法是重命名函数参数以避免名称冲突。尝试类似的东西：

function spookyEngine:Transform(obj, pos, size, rotation)
    object:Transform(obj, pos, size, rotation)
end

我的代码在我的模块脚本 Roblox 中找不到函数

My code cant find a function in my module script Roblox

module

lua

roblox