Unity2D添加Animator组件后玩家无法移动问题求助

玩家原本移动正常，添加动画后按下键盘按键玩家停止移动；移除Animator组件后移动恢复正常，已尝试分离动画与移动脚本，问题依旧。

相关代码 #

playerAnim 脚本 #

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

public class playerAnim : MonoBehaviour
{
    Animator anim;
    Rigidbody2D rb;
    void Start()
    {
        rb = gameObject.GetComponent<Rigidbody2D>();
        anim = gameObject.GetComponent<Animator>();
    }
    void FixedUpdate()
    {
        if (rb.velocity.x == 0)
            anim.SetBool("isRunning", false);
        else
            anim.SetBool("isRunning", true);
        if (rb.velocity.y > 0)
            anim.SetBool("isJumping", true);
        else
            anim.SetBool("isJumping", false);
    }
}

playerControl 脚本 #

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

public class playerControl : MonoBehaviour
{
    Rigidbody2D rb;
    private float horizontal;

    public float runSpeed;
    public float jumpPower;
    public bool inTheGround;
    private SpriteRenderer sp;
    Animator anim;

    void Start()
    {
        rb = gameObject.GetComponent<Rigidbody2D>();
        sp = gameObject.GetComponent<SpriteRenderer>();
        anim = gameObject.GetComponent<Animator>();
    }
    private void Update()
    {
        horizontal = Input.GetAxisRaw("Horizontal");
    }
    private void FixedUpdate()
    {
        rb.velocity = new Vector2(horizontal * runSpeed, rb.velocity.y);
        
        if (Input.GetButton("Jump") && inTheGround)
        {
            rb.velocity = new Vector2(rb.velocity.x, jumpPower);
        }
        flipping();
        Debug.Log(rb.velocity.x);
    }
    private void OnCollisionEnter2D(Collision2D other)
    {
        if (other.gameObject.CompareTag("ground"))
            inTheGround = true;
    }
    private void OnCollisionExit2D(Collision2D other)
    {
        if (other.gameObject.CompareTag("ground") && rb.velocity.y > 0.1)
            inTheGround = false;
    }
    void flipping()
    {
        if (Input.GetKey(KeyCode.RightArrow))
            sp.flipX = false;
        if (Input.GetKey(KeyCode.LeftArrow))
            sp.flipX = true;
    }
}

核心解决方法 #

这个问题绝大多数情况是Animator的Apply Root Motion选项导致的——开启该选项后，动画会直接控制物体位置，覆盖你通过Rigidbody编写的移动逻辑。

解决步骤：

• 选中玩家对象，打开Inspector面板找到Animator组件
• 取消勾选Apply Root Motion选项

额外优化建议 #

1. 浮点精度修正：判断rb.velocity.x是否为0时，不要直接用==0，改成Mathf.Abs(rb.velocity.x) < 0.01f，避免微小速度值导致动画状态判断错误。修改后的playerAnim代码片段：

void FixedUpdate()
{
    if (Mathf.Abs(rb.velocity.x) < 0.01f)
        anim.SetBool("isRunning", false);
    else
        anim.SetBool("isRunning", true);
    // 跳跃判断逻辑不变
}

2. 动画剪辑检查：如果取消Apply Root Motion后仍有问题，打开对应动画剪辑，在Inspector的Root Motion部分，确保Motion设置为None，避免动画自带的位移影响玩家移动。

内容的提问来源于stack exchange，提问作者ahmed