My character dont stop jumping

Questions & Answers
1

how to fix character infinite jump?

using UnityEngine;
using System.Collections;

public class Player : MonoBehaviour {

    public Animator Anim;
    public Rigidbody2D PlayerRigidbody;
    public int Pulo;

    
    public bool punch;

    //verifacador de chao 
    public Transform GroundCheck;
    public bool grounded;
    public LayerMask whatisGround;
    
    //soco tempo
    public float socoTempo;
    public float tempoTempo;

	// Use this for initialization
	void Start () {
	}
	
	// Update is called once per frame
	void Update () {
	
        
        // se o pulo for apertado e estiver pisando no chao, faca isso
    if(Input.GetButtonDown("Jump") && grounded== true) {
            PlayerRigidbody.AddForce(new Vector2(0, Pulo));
            
        }

    if(Input.GetButtonDown("Fire2")) {
            punch = true;
            tempoTempo = 0;

        }

        grounded = Physics2D.OverlapCircle(GroundCheck.position, 0.2f, whatisGround) ;

        if(punch == true)
        {
            tempoTempo += Time.deltaTime;
            if(tempoTempo >= socoTempo)
            {
                punch = false;
            }
        }

        Anim.SetBool ("soco", punch);

	}
}
2

The way I check if my player is touching the ground is to get the normal of the collision’s contact. If the nromal is pointing upwards then my player is touching the ground.

void OnCollisionStay2D(Collision2D other)
{
	var contacts = other.contacts;
	foreach(var c in contacts)
	{
		if(c.normal == Vector2.up)
			grounded = true;
	}
}

However, I need to set grounded to false in late update.

void LateUpdate()
{
	grounded = false;
}

Now I don’t need to set up sensors for the ground and a layer for ground.