Unity check isgrounded not working

Questions & Answers
1

My check if is grounded is not working. All the tags are right. Here is my code:

public Rigidbody rb;

public bool isGrounded;

// Use this for initialization
void Start()
{

}

// Update is called once per frame
void FixedUpdate()
{
    if(isGrounded)
    {

        if(Input.GetKey("space"))
        {
            rb.velocity = new Vector3(0, 10, 0);
        }
        
    }

}

void OnCollisionEnter (Collision collisionInfo)
{
    if(collisionInfo.collider.tag == "Ground")
    {
        isGrounded = true;
    }

    else
    {
        isGrounded = false;
    }
}
2

Setting isGrounded to false in OnCollisionExit would fix your problem, though this is not a good approach towards ground checks.