singleton issues.

Unity Engine
1

this is my problem and have made this super simple i just need to know why it doesnt work and how to fix it i cant work it out

i have a scene with a game manager that i dont want to destroy on load that works fine

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

public class GameManager : MonoBehaviour {


    public static GameManager Instance;

    public int score;


    public void Awake()
    {
        DontDestroyOnLoad(this.transform.gameObject);
        SceneManager.LoadScene("Game");
    }

}

in the game scene i want it to plus one and print to the debug.log

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

public class PlusOne : MonoBehaviour {

    // Use this for initialization
    void Start () {
       
    }
   
    // Update is called once per frame
    void Update () {
       
    }

    private void FixedUpdate()
    {
        GameManager.Instance.score = GameManager.Instance.score + 1;
        Debug.Log(GameManager.Instance.score);
    }
}

but instead i just get an error saying

NullReferenceException: Object reference not set to an instance of an object
PlusOne.FixedUpdate () (at Assets/PlusOne.cs:19)

can anyone help

2

In your GameManager, Instance is never assigned, it stays null. Just add.

Instance = this;

Into the Awake.
Note that this is in its simplest form.

3

well now i feel like a retard hahah thankyou i will remembernext time i have a little problem also and i cant figure it out

 if ( GameManager.Instance.Jump == true)
        {
            if (timer == 0)
            {
                timer = 20;
                GameManager.Instance.Jump = false;
            }
           
           
               
        }


        if (timer > 0)
        {
            timer -= 1;
        }

        Debug.Log(timer);

the debug.log spits out and not zero the stupid thing never reaches 0