for-loop - 如何使脚本影响 Roblox LUA 中的所有子项？

Question

我是 LUA 编程的新手，虽然我已经学习了类似的语言，比如 JS。如果我必须通过替换每个脚本来更改组中许多部分的相同脚本，这令人沮丧，而且我不知道这样做的优雅方法。相反，我决定将所有部分嵌套在脚本中。我看过一些例子，我试图改编其中的一些，但它们并不完全适用于我想做的事情，我无法让它们发挥作用。
从本质上讲，我要做的是监控所有的砖块，以便玩家联系它们。我采用了嵌套在每个砖块中的原始消失砖块脚本并对其进行了修改。如果一个部分(砖)被触摸，那应该调用 onTouch 函数，这将使砖的透明度随着时间的推移而降低，直到成对循环完成，之后砖消失并且 CanCollide 被关闭。 2 秒后，它又恢复正常。我认为问题在于我用来监控部件的编码，因为我不太了解监控多个对象的正确方法。有人可以帮忙吗？谢谢!
文件结构:

function onTouched(brick)
    local delay = .1 -- the delay between each increase in transparency (affects speed of disappearance)
    local RestoreDelay = 2 -- delay before the brick reappears
    local inc = .1 -- how much the brick disappears each time

    -- All characters have a Humanoid object
    -- if the model has one, it is a character
    local h = script.Child:findFirstChild("Humanoid") -- Find Humanoids in whatever touched this
    if (h ~=nil) then -- If there is a Humanoid then
        h.Health = h.MaxHealth -- Set the health to maximum (full healing)
        for x=0,1, inc do
            script.Child.Transparency = x+inc
            script.Child.CanCollide = true
            wait(delay)
        end
        wait(delay)
        script.Child.Transparency = 1
        script.Child.CanCollide = false
        wait(RestoreDelay)
        script.Child.Transparency = 0
        script.Child.CanCollide = true
    else
    end
end

while true do
    local bricks=script:GetChildren():IsA("basic.part")
    for x=1,brick in pairs(bricks) do
        brick.Touched:connect(onTouched(brick)) -- Make it call onTouched when touched
    end
end
end

Answer 1

在大多数情况下，您已经做对了，但是您遇到了一些语法错误，其中 JavaScript 和 Lua 之间存在不同的约定。
在 JS 中，您将获取一组对象，然后 bee 能够立即对其进行过滤，但在 Lua 中，对此的支持有限。所以像这样的一行:

var bricks = script.GetChildren().filter(function(item) 
   return item === "basic.part"
end)

如果没有某个图书馆的帮助，就不能在 Lua 中一行完成。因此，当您遍历对象时，您需要将检查移到循环中。
除此之外，唯一需要更改的是 onTouched处理程序的函数签名。 BasePart.Touched事件告诉你哪个物体接触了砖块，而不是砖块本身。但是通过创建 higher order function ，很容易接触到砖块和接触它的东西。

-- create a helper function to access the brick and the thing that touched it
function createOnTouched(brick)
    -- keep track whether the animation is running
    local isFading = false

    return function(otherPart)
        -- do not do the animation again if it has already started
        if isFading then
            return
        end

        local delay = .1 -- the delay between each increase in transparency (affects speed of disappearance)
        local restoreDelay = 2 -- delay before the brick reappears
        local inc = .1 -- how much the brick disappears each time

        -- All characters have a Humanoid object, check for one
        local h = otherPart.Parent:FindFirstChild("Humanoid")
        if h then
            -- heal the player
            h.Health = h.MaxHealth

            -- start fading the brick
            isFading = true
            brick.CanCollide = true
            for i = 0, 1, inc do
                brick.Transparency = i
                wait(delay)
            end
            -- turn off collision for the brick
            wait(delay)
            brick.Transparency = 1
            brick.Anchored = true
            brick.CanCollide = false

            -- turn the part back on
            wait(restoreDelay)
            brick.Transparency = 0
            brick.CanCollide = true

            -- reset the animation flag
            isFading = false
        end
    end
end

-- loop over the children and connect touch events
local bricks = script:GetChildren()
for i, brick in ipairs(bricks) do
    if brick:IsA("BasePart") then
        local onTouchedFunc = createOnTouched(brick)
        brick.Touched:Connect(onTouchedFunc)
    end
end