谁还活着

Coddy Roblox 游戏：灾难生存课程的第 7 课，共 20 课。

要知道谁赢了，游戏必须知道谁还活着。以玩家为键的表可以用作集合：survivors[player] = true 会添加一名玩家，survivors[player] = nil 会移除一名玩家，而 for player in survivors do 会遍历剩下的玩家。

Humanoid 的生命值降到 0 时会触发 Died。在回合开始时连接到它，可以在玩家倒下的那一刻将其从集合中移除：

survivors[player] = true
character.Humanoid.Died:Connect(function()
	survivors[player] = nil
end)

只有回合开始时还活着的玩家才能加入：正在等待重生的玩家，其角色已经死亡，Health 为 0。传送这个角色会把一名已死亡的玩家算作幸存者。

挑战

中等

记录本轮仍然存活的玩家。

回合开始时，创建 local survivors = {}。
只传送角色的 Humanoid.Health 大于 0 的玩家，并将每位玩家加入 survivors。
将每位玩家的 Humanoid.Died 连接到 survivors[player] = nil。
回合结束时，只传送存活的玩家返回，然后打印 "Survivors: " .. count。

按下“运行”：回合结束时，输出中会显示 Survivors: 1。然后按下“检查”。

亲手试试

local Players = game:GetService("Players")
local ServerStorage = game:GetService("ServerStorage")
local Settings = require(game.ReplicatedStorage.Settings)

local lobbySpawn = workspace.LobbySpawn

print("Rounds last " .. Settings.RoundLength .. " seconds")

-- 每位玩家的排行榜上都有 Wins
Players.PlayerAdded:Connect(function(player)
	local leaderstats = Instance.new("Folder")
	leaderstats.Name = "leaderstats"
	leaderstats.Parent = player

	local wins = Instance.new("IntValue")
	wins.Name = "Wins"
	wins.Parent = leaderstats
end)

-- 大厅里的状态板
local gui = Instance.new("SurfaceGui")
gui.Parent = workspace.StatusBoard

local status = Instance.new("TextLabel")
status.Name = "Status"
status.Size = UDim2.fromScale(1, 1)
status.BackgroundColor3 = Color3.fromRGB(25, 25, 35)
status.TextColor3 = Color3.fromRGB(255, 255, 255)
status.TextScaled = true
status.Text = "Welcome to Disaster Survival!"
status.Parent = gui

local function setStatus(text)
	status.Text = text
end

local function teleport(player, target)
	local character = player.Character
	if character then
		character:PivotTo(target.CFrame + Vector3.new(0, 4, 0))
	end
end

-- 回合循环
while true do
	for seconds = Settings.Intermission, 1, -1 do
		setStatus("Intermission: " .. seconds)
		task.wait(1)
	end

	local map = ServerStorage.Maps.Island:Clone()
	map.Name = "Map"
	map.Parent = workspace

	for _, player in Players:GetPlayers() do
		-- 第 7 课：在这里添加“谁还活着”的代码
		teleport(player, map.Spawn)
	end

	for seconds = Settings.RoundLength, 1, -1 do
		setStatus("Time left: " .. seconds)
		task.wait(1)
	end

	for _, player in Players:GetPlayers() do
		teleport(player, lobbySpawn)
	end
	map:Destroy()
end