I’m new in Unity and C#.And I have some problems. When my character moves using a ‘touchmove’, I used a ‘weapon’ to launch a ‘projectilePrefab’.
However, when I actually touched and moved the character, I had a problem that the “projectilePrefab” was fired too fast.
Help me PLZZZZZZZZ

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

public class Weapon : MonoBehaviour
{
    [SerializeField]
    private GameObject projectilePrefab;
    [SerializeField]
    private float attackRate = 0.5f;

    
    public void StartFiring()
    {
        StartCoroutine("TryAttack");
    }

    public void StopFiring()
    {
        StopCoroutine("TryAttack");
    }

    private IEnumerator TryAttack()
    {
        while ( true)
        {
            Instantiate(projectilePrefab, transform.position, Quaternion.identity);

            yield return new WaitForSeconds(attackRate);
        }
    }

   
}

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

public class TouchMove : MonoBehaviour
{
    private Vector3 touchPosition;
    private Rigidbody2D rb;
    private Vector3 direction;
    private float moveSpeed = 10f;
    private Weapon weapon;

    private void Awake() 
    {
       weapon = GetComponent<Weapon>();    
    }

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

    private void Update()
    {
        if(Input.touchCount > 0)
        {
            Touch touch = Input.GetTouch(0);
            touchPosition = Camera.main.ScreenToWorldPoint(touch.position);
            touchPosition.z = 0;
            direction = (touchPosition - transform.position);
            rb.velocity = new Vector2(direction.x, direction.y) * moveSpeed;
            weapon.StartFiring();

            if (touch.phase == TouchPhase.Ended)
                rb.velocity = Vector2.zero;
                weapon.StopFiring();
        }
    }
}

I want to make sure that the launch speed of “projectilePrefab” is fired at 0.5f, which is the launch speed I set.