蹲伏动画Bug修复问询：蹲伏时按Shift调速异常问题

问题现象 #

• 按下Left Ctrl进入蹲伏状态后，再按Left Shift，角色依然会获得奔跑速度
• 预期行为：蹲伏状态下按Shift，角色保持蹲伏速度（蹲伏动画无调速功能）

现有代码 #

local UIS = game:GetService('UserInputService');
local key = Enum.KeyCode.LeftShift
local ctrl = Enum.KeyCode.LeftControl
local pl = game.Players.LocalPlayer;
local char = script.Parent or pl.CharacterAdded:Wait();
 
local hum = char:WaitForChild('Humanoid');
 
local Move = 'rbxassetid://14908666655'
local Idle = 'rbxassetid://14908644962'
 
local Crouching = false;
local Holding = false;
 
local HoldCrouching = false;
 
local function ResetAnimation(boolean)
    if boolean then
        script.CrouchAnimation.AnimationId = Move
    else
        script.CrouchAnimation.AnimationId = Idle
    end
end
 
local function ChangeState(boolean)
    if boolean then  
        hum.WalkSpeed = 8
        
        hum:SetStateEnabled(Enum.HumanoidStateType.Jumping, false)
        
        local Anim = hum:LoadAnimation(script.CrouchAnimation)
        Anim:Play()
    else
        hum.WalkSpeed = 16
        
        hum:SetStateEnabled(Enum.HumanoidStateType.Jumping, true)
        for _,i in ipairs(hum.Animator:GetPlayingAnimationTracks()) do
            if i and i.Name == 'CrouchAnimation' then
                i:Stop()
            end
        end
    end
end
 
script:WaitForChild('CrouchAnimation').Changed:Connect(function()
    if Crouching then
        
        for _,i in ipairs(hum.Animator:GetPlayingAnimationTracks()) do
            if i and i.Name == 'CrouchAnimation' then
                i:Stop()
            end
        end
        
        local Anim = hum:LoadAnimation(script.CrouchAnimation) 
        Anim:Play()
    else
        for _,i in ipairs(hum.Animator:GetPlayingAnimationTracks()) do
            if i and i.Name == 'CrouchAnimation' then
                i:Stop()
            end
        end
    end
end)
 
UIS.InputBegan:Connect(function(Input, proc) 
    if proc then
        return;
    end
    if Input then
        if Input.KeyCode == ctrl then
            if not Crouching then
                Crouching = true;
                
                ChangeState(true)
                
            elseif Crouching and not Holding then
                Crouching = false;
                
                ChangeState(false)
                
            end
        end
    end
end)
 
UIS.InputEnded:Connect(function(Input, proc)
    if proc then
        return;
    end
    if Input then
        if Input.KeyCode == ctrl then
            if Crouching and Holding then
                Crouching = false;
 
                ChangeState(false)
            end
        end
    end
end)
 
game:GetService('RunService').RenderStepped:Connect(function()
    if Crouching then
        if hum.MoveDirection.Magnitude > 0 then
            ResetAnimation(true)
        else
            ResetAnimation(false)
        end
    end
end)

修复思路与修改代码 #

问题核心是未在蹲伏状态下屏蔽Shift的加速效果，需添加Shift状态跟踪，并在蹲伏时强制锁定行走速度。

修改后的完整代码：

local UIS = game:GetService('UserInputService');
local shiftKey = Enum.KeyCode.LeftShift
local ctrlKey = Enum.KeyCode.LeftControl
local pl = game.Players.LocalPlayer;
local char = script.Parent or pl.CharacterAdded:Wait();
 
local hum = char:WaitForChild('Humanoid');
 
local MoveAnim = 'rbxassetid://14908666655'
local IdleAnim = 'rbxassetid://14908644962'
 
local isCrouching = false;
local isSprinting = false;
local baseWalkSpeed = 16;
local crouchWalkSpeed = 8;
local sprintWalkSpeed = 24; -- 原奔跑速度，可按需调整
 
local function ResetAnimation(isMoving)
    script.CrouchAnimation.AnimationId = isMoving and MoveAnim or IdleAnim
end
 
local function UpdateWalkSpeed()
    if isCrouching then
        hum.WalkSpeed = crouchWalkSpeed
    else
        hum.WalkSpeed = isSprinting and sprintWalkSpeed or baseWalkSpeed
    end
end
 
local function ChangeCrouchState(enableCrouch)
    isCrouching = enableCrouch
    
    if enableCrouch then  
        hum:SetStateEnabled(Enum.HumanoidStateType.Jumping, false)
        local Anim = hum:LoadAnimation(script.CrouchAnimation)
        Anim:Play()
    else
        hum:SetStateEnabled(Enum.HumanoidStateType.Jumping, true)
        for _, track in ipairs(hum.Animator:GetPlayingAnimationTracks()) do
            if track.Name == 'CrouchAnimation' then
                track:Stop()
            end
        end
    end
    UpdateWalkSpeed()
end
 
script.CrouchAnimation.Changed:Connect(function()
    if isCrouching then
        for _, track in ipairs(hum.Animator:GetPlayingAnimationTracks()) do
            if track.Name == 'CrouchAnimation' then
                track:Stop()
            end
        end
        local Anim = hum:LoadAnimation(script.CrouchAnimation) 
        Anim:Play()
    else
        for _, track in ipairs(hum.Animator:GetPlayingAnimationTracks()) do
            if track.Name == 'CrouchAnimation' then
                track:Stop()
            end
        end
    end
end)
 
UIS.InputBegan:Connect(function(Input, isProcessed) 
    if isProcessed then return end
    
    if Input.KeyCode == ctrlKey then
        if not isCrouching then
            ChangeCrouchState(true)
        else
            ChangeCrouchState(false)
        end
    elseif Input.KeyCode == shiftKey then
        isSprinting = true
        UpdateWalkSpeed()
    end
end)
 
UIS.InputEnded:Connect(function(Input, isProcessed)
    if isProcessed then return end
    
    if Input.KeyCode == ctrlKey then
        ChangeCrouchState(false)
    elseif Input.KeyCode == shiftKey then
        isSprinting = false
        UpdateWalkSpeed()
    end
end)
 
game:GetService('RunService').RenderStepped:Connect(function()
    if isCrouching then
        local isMoving = hum.MoveDirection.Magnitude > 0
        ResetAnimation(isMoving)
        -- 强制锁定蹲伏速度，避免其他逻辑意外修改
        if hum.WalkSpeed ~= crouchWalkSpeed then
            hum.WalkSpeed = crouchWalkSpeed
        end
    end
end)

关键修改点 #

1. 新增状态变量：添加isSprinting跟踪Shift按键状态，拆分速度常量便于维护
2. 统一速度更新逻辑：创建UpdateWalkSpeed函数，根据蹲伏和奔跑状态动态设置速度，确保蹲伏时优先使用蹲伏速度
3. 屏蔽蹲伏时的奔跑效果：在RenderStepped中强制检查并锁定蹲伏状态下的行走速度，彻底避免Shift影响
4. 优化代码可读性：重命名变量（如Crouching→isCrouching），拆分常量，逻辑更清晰

内容的提问来源于stack exchange，提问作者arthur