Unity中如何禁用FPS游戏暂停时的鼠标视角控制？

我跟着Brackeys的Unity暂停菜单教程制作FPS游戏，现在遇到一个问题：暂停游戏时玩家无法移动，但我希望此时玩家仍然可以通过鼠标转动视角，同时鼠标能在菜单上正常移动，玩家脚本也能接收鼠标输入。我尝试用布尔值解决，但没成功，相关代码如下：

暂停菜单脚本 #

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;

public class PauseMenu : MonoBehaviour
{
    public static bool GameIsPaused = false;

    public GameObject pauseMenuUI;

    void Update ()
    {
        if (Input.GetKeyDown(KeyCode.Escape))
        {
            if (GameIsPaused)
            {
                Resume( );
            }
            else
            {
                Pause ();
            }
        }
    }

    public void Resume ()
    {
        pauseMenuUI.SetActive(false);
        Time.timeScale = 1f;
        GameIsPaused = false;
    }
    void Pause ()
    {
        pauseMenuUI.SetActive(true);
        Time.timeScale = 0f;
        GameIsPaused = true;
    }
}

玩家控制器脚本 #

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

[RequireComponent(typeof(CharacterController))]

public class PlayerController : MonoBehaviour
{
    public float walkingSpeed = 7.5f;
    public float runningSpeed = 11.5f;
    public float jumpSpeed = 8.0f;
    public float gravity = 20.0f;
    public Camera playerCamera;
    public float lookSpeed = 2.0f;
    public float lookXLimit = 45.0f;

    CharacterController characterController;
    Vector3 moveDirection = Vector3.zero;
    float rotationX = 0;

    [HideInInspector]
    public bool canMove = true;

    void Start()
    {
        characterController = GetComponent<CharacterController>();

        // Lock cursor
        Cursor.lockState = CursorLockMode.Locked;
        Cursor.visible = false;
    }

    void Update()
    {
        // We are grounded, so recalculate move direction based on axes
        Vector3 forward = transform.TransformDirection(Vector3.forward);
        Vector3 right = transform.TransformDirection(Vector3.right);
        // Press Left Shift to run
        bool isRunning = Input.GetKey(KeyCode.LeftShift);
        float curSpeedX = canMove ? (isRunning ? runningSpeed : walkingSpeed) * Input.GetAxis("Vertical") : 0;
        float curSpeedY = canMove ? (isRunning ? runningSpeed : walkingSpeed) * Input.GetAxis("Horizontal") : 0;
        float movementDirectionY = moveDirection.y;
        moveDirection = (forward * curSpeedX) + (right * curSpeedY);

        if (Input.GetButton("Jump") && canMove && characterController.isGrounded)
        {
            moveDirection.y = jumpSpeed;
        }
        else
        {
            moveDirection.y = movementDirectionY;
        }

        // Apply gravity. Gravity is multiplied by deltaTime twice (once here, and once below
        // when the moveDirection is multiplied by deltaTime). This is because gravity should be applied
        // as an acceleration (ms^-2)
        if (!characterController.isGrounded)
        {
            moveDirection.y -= gravity * Time.deltaTime;
        }

        // Move the controller
        characterController.Move(moveDirection * Time.deltaTime);

        // Player and Camera rotation
        if (canMove)
        {
            rotationX += -Input.GetAxis("Mouse Y") * lookSpeed;
            rotationX = Mathf.Clamp(rotationX, -lookXLimit, lookXLimit);
            playerCamera.transform.localRotation = Quaternion.Euler(rotationX, 0, 0);
            transform.rotation *= Quaternion.Euler(0, Input.GetAxis("Mouse X") * lookSpeed, 0);
        }
    }
}

解决方案 #

问题根源在于两点：

1. 暂停时未处理鼠标锁定状态，导致鼠标无法在菜单上交互；
2. 视角旋转被canMove变量限制，且未和暂停状态做区分，同时Time.timeScale = 0会影响部分时间相关逻辑，但鼠标输入不受其影响。

1. 修改暂停菜单脚本 #

添加鼠标状态控制，确保暂停时解锁鼠标，恢复时重新锁定：

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SceneManagement;

public class PauseMenu : MonoBehaviour
{
    public static bool GameIsPaused = false;

    public GameObject pauseMenuUI;

    void Update ()
    {
        if (Input.GetKeyDown(KeyCode.Escape))
        {
            if (GameIsPaused)
            {
                Resume();
            }
            else
            {
                Pause();
            }
        }
    }

    public void Resume ()
    {
        pauseMenuUI.SetActive(false);
        Time.timeScale = 1f;
        GameIsPaused = false;
        // 恢复鼠标锁定状态
        Cursor.lockState = CursorLockMode.Locked;
        Cursor.visible = false;
    }

    void Pause ()
    {
        pauseMenuUI.SetActive(true);
        Time.timeScale = 0f;
        GameIsPaused = true;
        // 解锁鼠标，允许菜单交互
        Cursor.lockState = CursorLockMode.None;
        Cursor.visible = true;
    }
}

2. 修改玩家控制器脚本 #

拆分移动与视角旋转逻辑，让视角旋转不受暂停状态限制，同时调整重力计算避免暂停时失效：

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

[RequireComponent(typeof(CharacterController))]

public class PlayerController : MonoBehaviour
{
    public float walkingSpeed = 7.5f;
    public float runningSpeed = 11.5f;
    public float jumpSpeed = 8.0f;
    public float gravity = 20.0f;
    public Camera playerCamera;
    public float lookSpeed = 2.0f;
    public float lookXLimit = 45.0f;

    CharacterController characterController;
    Vector3 moveDirection = Vector3.zero;
    float rotationX = 0;

    [HideInInspector]
    public bool canMove = true;

    void Start()
    {
        characterController = GetComponent<CharacterController>();

        // Lock cursor
        Cursor.lockState = CursorLockMode.Locked;
        Cursor.visible = false;
    }

    void Update()
    {
        // 仅在未暂停且canMove为true时允许移动
        bool allowMovement = canMove && !PauseMenu.GameIsPaused;

        Vector3 forward = transform.TransformDirection(Vector3.forward);
        Vector3 right = transform.TransformDirection(Vector3.right);
        bool isRunning = Input.GetKey(KeyCode.LeftShift);
        
        // 移动速度计算
        float curSpeedX = allowMovement ? (isRunning ? runningSpeed : walkingSpeed) * Input.GetAxis("Vertical") : 0;
        float curSpeedY = allowMovement ? (isRunning ? runningSpeed : walkingSpeed) * Input.GetAxis("Horizontal") : 0;
        float movementDirectionY = moveDirection.y;
        moveDirection = (forward * curSpeedX) + (right * curSpeedY);

        // 跳跃逻辑
        if (Input.GetButton("Jump") && allowMovement && characterController.isGrounded)
        {
            moveDirection.y = jumpSpeed;
        }
        else
        {
            moveDirection.y = movementDirectionY;
        }

        // 重力计算：使用unscaledDeltaTime避免暂停时重力停止
        if (!characterController.isGrounded)
        {
            moveDirection.y -= gravity * Time.unscaledDeltaTime;
        }

        // 执行移动
        if (allowMovement)
        {
            characterController.Move(moveDirection * Time.deltaTime);
        }

        // 视角旋转：不受暂停状态限制，始终允许（可根据需求调整是否保留身体旋转）
        rotationX += -Input.GetAxis("Mouse Y") * lookSpeed;
        rotationX = Mathf.Clamp(rotationX, -lookXLimit, lookXLimit);
        playerCamera.transform.localRotation = Quaternion.Euler(rotationX, 0, 0);
        
        // 暂停时可选关闭身体旋转，仅保留相机旋转
        if (!PauseMenu.GameIsPaused)
        {
            transform.rotation *= Quaternion.Euler(0, Input.GetAxis("Mouse X") * lookSpeed, 0);
        }
    }
}

核心修改说明 #

• 鼠标状态控制：暂停时解锁鼠标，让玩家能操作菜单；恢复时重新锁定鼠标，回归游戏操作。
• 逻辑拆分：将移动权限和视角旋转权限分离，确保暂停时视角仍可通过鼠标控制。
• 时间处理：重力计算使用Time.unscaledDeltaTime，避免Time.timeScale = 0导致重力暂停。
• 状态关联：直接通过PauseMenu.GameIsPaused判断暂停状态，确保移动逻辑仅在游戏运行时生效。

内容的提问来源于stack exchange，提问作者BVFreak