如何修复：尝试使用 'entered' 索引 nil

Question

所以基本上，脚本应该在介绍屏幕消失后加载文本，不确定它有什么问题，因为它在 2014 年就起作用了：/

代码：

if true then
    script.Parent.slowsleigh:Play()
    fadegui({intro.load},{0},{1},30)
    wait(1)

    local titles = intro.titles
    local text1 = titles.title1.Text
    local text2 = titles.title2.Text
    local text3 = titles.title3.Text
    local text4 = titles.title4.Text
    if GameData.entered == 1 then
        text1 = "And you came back."
        text2 = "You can't change the past."
        text3 = "Pathetic."
    end

    titles.title1.Text = ""
    titles.title2.Text = ""
    titles.title3.Text = ""
    titles.title4.Text = ""
    --[
    titles.title1.Visible = true
    for i = 1, #text1 do
        titles.title1.Text = string.sub(text1,1,i)
        wait(0.05 + math.random(-5,10)/200)
    end

下面是 ServerScriptServices 中的脚本

local data = game:GetService("DataStoreService"):GetGlobalDataStore()
local dataVersion = 2

local func = Instance.new("RemoteFunction",workspace)
func.Name = "GetData"
function func.OnServerInvoke(player)
    local store = data:GetAsync(tostring(player.UserId))
    return store
end

local set = Instance.new("RemoteEvent",workspace)
set.Name = "SetData"
set.OnServerEvent:connect(function(player,newData)
    local store = data:GetAsync(tostring(player.UserId))
    for i,v in pairs(newData) do
        store[i] = v
    end
    data:SetAsync(player.UserId, store)
end)

错误：

  17:48:57.908  Players.Trl0_P90.PlayerGui.maingui.mainscript:758: attempt to index nil with 'entered'  -  Client - mainscript:758

Answer 1

错误告诉您您正在尝试访问 GameData.entered，而 GameData 为 nil。

从您共享的代码来看，您的问题似乎是您正在访问数据存储中的数据，而没有考虑数据可能不存在的事实。查看 GlobalDataStore:GetAsync() 的文档：

This function returns the latest value of the provided key and a DataStoreKeyInfo instance. If the key does not exist or if the latest version has been marked as deleted, both return values will be nil.

这可能是新玩家加入导致的，没有默认数据。因此，您可以做的一件事是设置一些默认数据，以防出现新玩家：

local func = Instance.new("RemoteFunction",workspace)
func.Name = "GetData"
function func.OnServerInvoke(player)
    local store = data:GetAsync(tostring(player.UserId))

    -- if there is no data, it might be a new player!
    -- provide some new player data
    if not store then
        store = {
            entered = 1,
            foo = true,
            bar = "blah",
        }
    end
    return store
end

这样，该函数将始终 return 形状正确的数据。

如何修复：尝试使用 'entered' 索引 nil

How to fix: attempt to index nil with 'entered'

lua

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