Unity - Bool doesn't change to false anymore

Question

I got into a Unity-Tutorial and halfway-through I face this weird problem. I used this code so that my player may attack if he pressed a leftShift. When the player attacks, the animation starts playing in a loop - he never stops attacking and debugging show that attack is never false after the first "leftShift"-Input.

I removed the loops from the animator etc. - but that doesn't seem to be the problem because "attack" never get's to false anyways. I tried different approaches. If I set "attack = false" immediately after attacking, he doesn't attack at all.

Sorry for asking such a beginner question but I can't seem to find my error.

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

public class Player : MonoBehaviour
{
private Rigidbody2D myRigidbody;

[SerializeField]
private float movementSpeed;

private bool facingRight = true;

private Animator myAnimator;

private bool attack = false;

// Start is called before the first frame update
void Start()
{
    myRigidbody = GetComponent<Rigidbody2D>();
    myAnimator = GetComponent<Animator>();
}

void Update()
{
    HandleInput();
    Debug.Log(attack);

}

// Update is called once per frame

void FixedUpdate()
{
    float horizontal = Input.GetAxis("Horizontal");
    HandleMovement(horizontal);
    Flip(horizontal);
    HandleAttacks();
    ResetValues();


}

private void HandleMovement(float horizontal)
{
    if (!this.myAnimator.GetCurrentAnimatorStateInfo(0).IsTag("Attack"))
    {


        myRigidbody.velocity = new Vector2(horizontal * movementSpeed, myRigidbody.velocity.y);
        myAnimator.SetFloat("speed", Mathf.Abs(horizontal));
    }
}

private void HandleAttacks()
{
    if (attack)
    {
        myAnimator.SetTrigger("attack");


    } 
}

private void HandleInput()
{
    if (Input.GetKeyDown(KeyCode.LeftShift))
    {
        attack = true;

    }
    attack = false;
}

private void Flip(float horizontal)
{
    if(horizontal > 0 && !facingRight || horizontal < 0 && facingRight)
    {
        facingRight = !facingRight;
        Vector3 theScale = transform.localScale;
        theScale.x *= -1;
        transform.localScale = theScale;
    }
}

private void ResetValues()
{
    attack = false;
}
}

Answer 1

The issue was that only the bool "attack" was being changed, not the animation parameter "attack. After lots of testing this code finally works if anyone is interested:

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

public class Player : MonoBehaviour
{
    private Rigidbody2D myRigidbody;

    [SerializeField]
    private float movementSpeed;
    private bool attack = false;

    private float attackTimer;

    private bool facingRight = true;

    private Animator myAnimator;

    // Start is called before the first frame update 
    void Start()
    {
        myRigidbody = GetComponent<Rigidbody2D>();
        myAnimator = GetComponent<Animator>();
    }

    void Update()
    {
        HandleInput();
        if (attack)
        {
            Debug.Log(attack);
        }

        float horizontal = Input.GetAxis("Horizontal");

        HandleMovement(horizontal);
        Flip(horizontal);
        HandleAttacks();
        //ResetValues();

    }

    // Update is called once per frame 

    void FixedUpdate()
    {



    }

    private void HandleMovement(float horizontal)
    {
        if (!this.myAnimator.GetCurrentAnimatorStateInfo(0).IsTag("Attack"))
        {


            myRigidbody.velocity = new Vector2(horizontal * movementSpeed, myRigidbody.velocity.y);
            myAnimator.SetFloat("speed", Mathf.Abs(horizontal));
        }
    }

    private void HandleAttacks()
    {
        if (attack)
        {
            myAnimator.SetTrigger("attack");

            attack = false;
            myAnimator.ResetTrigger("attack");

        }
    }

    private void HandleInput()
    {
        if (Input.GetKeyDown(KeyCode.LeftShift))
        {

            attack = true;
            HandleAttacks();

        }

    }

    private void Flip(float horizontal)
    {
        if (horizontal > 0 && !facingRight || horizontal < 0 && facingRight)
        {
            facingRight = !facingRight;
            Vector3 theScale = transform.localScale;
            theScale.x *= -1;
            transform.localScale = theScale;
        }
    }

    private void ResetValues()
    {
        attack = false;
    }

}