Saving score when app closes with PlayerPrefs

Unity Engine
1

I want my highscore to save when my app closes. I have searched many ways but I’m struggling to write it in my code. I added the PlayerPrefs where I thought they should go, but when I test the app, my high score does not save :-(. Can anyone can help me out with where I’m going wrong!!!

#pragma strict

var scoreCount: GUIText;
var scoreValue: int;
var hasLost:boolean = false;
var bestScore: int = 0;
var lastBest: int = 0;
var buttonStyle: GUIStyle;
var isPaused: boolean;





function Start () {
        if(PlayerPrefs.HasKey("highScore")){
            bestScore = 0;
            } else{
        bestScore = PlayerPrefs.GetInt("highScore");
}
}

function Update () {
    if(Input.GetMouseButton(0)){
      rigidbody.AddForce (Vector3.forward * 15);
    }
    }
    {
    if(Input.GetMouseButtonUp(0)){
    Debug.Log ("I lifted the button");
    rigidbody.drag = 1;
    }
    }
    {
    if(Input.GetKeyDown (KeyCode.Escape));{
    OnBackPressed();
    }
    }

    var str:String;
   
    if(!hasLost) {
        str = "Score: " + scoreValue.ToString();
    } else {
        str = "Score:" + scoreValue.ToString() + "\nHigh Score:" + bestScore;
        if(bestScore > lastBest) str += "\nNEW RECORD!";
    }
    scoreCount.text = str;
   
    if(transform.position.y <-9) {
        if(!hasLost) {
            hasLost = true;
            lastBest = bestScore;
            if(scoreValue > bestScore) {
                bestScore = scoreValue;
            }
        }
    }
}

function OnGUI(){
    if(hasLost){
var buttonW:int = 300; // button width
    var buttonH:int = 100; // button height
   
    var halfScreenW:float = Screen.width/2.1; // half of the Screen width
    var halfButtonW:float = buttonW/2; // Half of the button width

        if(GUI.Button(Rect(halfScreenW-halfButtonW,Screen.height*.8,buttonW,buttonH),"Play Again", buttonStyle)){
            scoreValue = 0;
            hasLost = false;
            transform.position = Vector3(0.13,-0.968,-21.042);
            rigidbody.velocity = Vector3(0,0,0);
        }
    }
}

function OnTriggerEnter (col : Collider){
    if (col.gameObject.FindWithTag ("score"));
    {
    Debug.Log ("Score!!!");
    scoreValue += 1;
    //scoreCount.text = "Score: " + scoreValue;
    }
}

function OnBackPressed(){
    if(Input.GetKeyDown (KeyCode.Escape)){
    {       
    if(bestScore < scoreValue){
    PlayerPrefs.SetInt("highScore", bestScore);
    }
    }
    Application.Quit();
    }
}

The code is showing my high score when I need it to during the game, I just need the highscore to save when the app is closed.

2

Don’t you want to read the high score if the PlayerPrefs have the highscore key? Your line 17 sets the high score to zero if the player pref is present.

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