Save score in Unity

Questions & Answers
1

I have the following script which I use for calculating the score

public class Score : MonoBehaviour {

    Score sc;

    void Start()
    {
        GameObject obj = GameObject.Find("ScoreSystem");
        sc = obj.GetComponent<Score>();

    }

    void OnTriggerEnter2D(Collider2D coll)
    {
        if (coll.tag == "Ball")
        {
            sc.score++;
        }
    } }

and this is the class where I increase the value

public class Score : MonoBehaviour {

    public int score;

    void Start()
    {
        score = 0;
    }
}

But the problem I have is that the value always stays 0 when I switch to a different scene. I even used this code to store the value and display in the next scene but it didn’t work

void Update()
{
    PlayerPrefs.SetInt("score", score);
    PlayerPrefs.Save();
}

and this code for taking the value

score = PlayerPrefs.GetInt("score");

How can I store the latest value inside an Int and display it in the next scene and when I leave that scene it reverts back to 0?

2

first your score calculating script and the script where you are increasing value have the same name.
change the class name as ScoreSystem and then update value.
you have to update your prefs in the OnTriggerEnter2D method instead of update.

 void OnTriggerEnter2D(Collider2D coll)
     {
         if (coll.tag == "Ball")
         {
             sc.score++;
            PlayerPrefs.SetInt("score", sc.score);
            PlayerPrefs.Save();
         }
     }

and make sure your OnTriggerEnter2D method is working fine.
Note:

you can get PlayerPrefs as you set in the code.