Unity 2D角色跳跃动画不显示问题排查求助

在Unity 2D中实现角色跳跃动画（仅切换静止Sprite帧），代码逻辑显示正常，按下跳跃键时角色可跳跃但Sprite无变化。跟随教程操作，也尝试了其他Animator和Animation窗口教程，但均无法切换跳跃Sprite。

代码实现 #

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

public class Player : MonoBehaviour
{

    [SerializeField]
    private float moveForce = 10f;

    [SerializeField]
    private float jumpForce = 11f;

    private float movementX;

    private float movementY;

    private Rigidbody2D myBody;

    private SpriteRenderer sr;

    private Animator anim;

    private string WALK_ANIMATION = "Walk";

    private bool isGrounded = true;

    private string GROUND_TAG = "Ground";

    private string JUMP_ANIMATION = "Jump";

    private void Awake()
    {

        myBody = GetComponent<Rigidbody2D>();
        anim = GetComponent<Animator>();

        sr = GetComponent<SpriteRenderer>();

    }
    

    // Start is called before the first frame update
    void Start()
    {
        
    }

    // Update is called once per frame
    void Update()
    {
        PlayerMoveKeyboard();
        AnimatePlayer();
        PlayerJump();
        
    }

     void FixedUpdate()
    {
        
    }

    void PlayerMoveKeyboard()
    {
        movementX = Input.GetAxisRaw("Horizontal");

        movementY = Input.GetAxisRaw("Vertical");

        transform.position += new Vector3(movementX, 0f, 0f) * Time.deltaTime * moveForce;
    }

   

    void AnimatePlayer()
    {
        if (movementX > 0)
        {
            anim.SetBool(WALK_ANIMATION, true);
            sr.flipX = false;
        }
        else if (movementX < 0)
        {
            anim.SetBool(WALK_ANIMATION, true);
            sr.flipX = true;
        }
        else
        {
            anim.SetBool(WALK_ANIMATION, false);
        }

    }
    void PlayerJump()
        {

            if (Input.GetButtonDown("Jump") && isGrounded)
            {
                isGrounded = false;
                myBody.AddForce(new Vector2(0f, jumpForce), ForceMode2D.Impulse);
                anim.SetBool(JUMP_ANIMATION, true);
                Debug.Log("You should be jumping.");
            } 

        }

    private void OnCollisionEnter2D(Collision2D collision)
    {

        if(collision.gameObject.CompareTag(GROUND_TAG))
        {
            isGrounded = true;
            anim.SetBool(JUMP_ANIMATION, false);
        }

    }
} 

当前Animator状态 #

不确定信息是否完整，可随时要求补充。

已尝试的解决方法 #

• 修改动画过渡（从行走→跳跃改为 idle→跳跃）
• 移除代码中的行走动画逻辑
• 移除行走→idle的过渡，仅保留行走→跳跃
• 勾选/取消勾选Has Exit Time
• 延长跳跃动画时长
• 调整跳跃动画速度（1→0.5、1→2）
• 在AnimatePlayer函数中添加判断，仅当角色Y值高于地面时设置JUMP_ANIMATION为true
• 尝试用Trigger替代Bool触发跳跃动画（不确定代码是否正确）

控制台显示Jump参数已正确设为true，但角色视觉Sprite无变化，求排查遗漏点。

内容的提问来源于stack exchange，提问作者LittleRukia