NPC跟随脚本无法运行且无报错问题求助（附代码）

以下是你提供的问题代码：

local connection = path.Reached:Connect(function()
            reached = true
            script.Parent.Reached:Fire(target)
        end)
        repeat
            chasing = true
            followingTarget = target
            -- enable stuff for target
            target.GettingChased.Value = true
            target.GettingChasedBy.Value = script.Parent
            TeddyAI.Chasing.Value = true
            local plr = game.Players:GetPlayerFromCharacter(target.Character)
            path:Run(target.Character.HumanoidRootPart.Position)
        until not path or path.LastError == "ComputationError" or not target.Character or target.Character:FindFirstChild("HumanoidRootPart") == nil or target.Character.Humanoid.Health < 1 or target.Safe.Value or findPotentialTarget() ~= target or reached
        if connection then
            connection:Disconnect()
        end
        if findPotentialTarget() ~= target then
            if path and path._moveConnection then
                path:Stop()
            end
        end
        print("stopped")
        chasing = false
    else
        print("block to block")
        blockToBlock()
    end
    game:GetService("RunService").Heartbeat:Wait()
end

核心问题分析 #

1. 重复调用path:Run()导致路径重置
   repeat-until循环会反复执行path:Run()，每次调用都会中断当前路径计算并重新开始，NPC根本没有时间移动，看起来像是脚本未运行。

2. reached变量未正确初始化
   代码中reached未在循环前初始化，默认值为nil（Lua中视为false），若path.Reached事件未触发，循环会无限执行，脚本卡死在循环内。

3. 路径事件连接逻辑混乱
   path.Reached连接创建在循环外，但循环内多次调用path:Run()，会导致旧的路径事件未正确处理，新路径的触发逻辑被覆盖。

修复方案 #

1. 移除循环内的path:Run()调用
   只在开始追踪时调用一次path:Run()，通过事件和条件检查来处理停止逻辑，而非重复触发路径计算：

   local reached = false
   local connection = path.Reached:Connect(function()
       reached = true
       script.Parent.Reached:Fire(target)
   end)
   
   chasing = true
   followingTarget = target
   -- 标记目标状态
   target.GettingChased.Value = true
   target.GettingChasedBy.Value = script.Parent
   TeddyAI.Chasing.Value = true
   
   -- 仅调用一次路径计算，添加错误捕获
   local success, err = pcall(function()
       path:Run(target.Character.HumanoidRootPart.Position)
   end)
   if not success then
       warn("路径执行错误: " .. err)
       reached = true -- 触发循环退出
   end
   
   -- 改用循环监听停止条件
   while not reached do
       task.wait()
       -- 检查停止条件
       if not path 
           or path.LastError == "ComputationError" 
           or not target.Character 
           or not target.Character:FindFirstChild("HumanoidRootPart")
           or target.Character.Humanoid.Health < 1 
           or target.Safe.Value 
           or findPotentialTarget() ~= target then
           reached = true
           if path and path._moveConnection then
               path:Stop()
           end
       end
   end
   
   connection:Disconnect()
   print("stopped")
   chasing = false
   

2. 确保path对象正确初始化
   确认PathfindingService创建路径时参数匹配NPC的尺寸，避免路径计算失败：

   local PathfindingService = game:GetService("PathfindingService")
   local path = PathfindingService:CreatePath({
       AgentRadius = 2, -- 匹配NPC碰撞体半径
       AgentHeight = 5, -- 匹配NPC高度
       AgentCanJump = true -- 根据NPC能力设置
   })
   

3. 添加错误捕获
   用pcall包裹path:Run()，捕获隐藏错误，避免脚本静默失败。

内容的提问来源于stack exchange，提问作者bpGame