有人能帮我解决一下为什么按下 OnSprint 键后，这个状态不会变成 false 吗？

using UnityEngine;
using UnityEngine.InputSystem;

public class PlayerControl : MonoBehaviour
{
// 基本定义
private Rigidbody2D rb;
private Vector2 moveInput;

// 基本属性
float basespeed = 3f;

// 键盘状态
bool sprinting;

private void Awake()
{
    rb = GetComponent<Rigidbody2D>();
}

public void OnMove(InputValue direction)
{
    moveInput = direction.Get<Vector2>();
}

public void OnSprint(InputValue value)
{
    Debug.Log(value.isPressed);
    sprinting = value.isPressed;
}

private void FixedUpdate()
{
    if (sprinting == false)
    {
        rb.linearVelocity = moveInput * basespeed;
    }
    else
    {
        rb.linearVelocity = moveInput * basespeed * 2;
    }
}

}