PlayerPrefs is acting weird ??

Questions & Answers
1

The first Script which calculates score and stores in Playerprefs.

using UnityEngine;
using System.Collections;

public class Scores : MonoBehaviour {
	
	private int score;
	// Use this for initialization
	void Awake () {
		PlayerPrefs.SetInt("score",0);
	}
	
	public void AddScore()
	{
		score = score + 1;
		PlayerPrefs.SetInt("score", score);
		Debug.Log(score);
	}
}

Second Script which calls this first script for updating score.

using UnityEngine;
using System.Collections;

[RequireComponent(typeof(Scores))]
public class TheCollision : MonoBehaviour {

	public Pool pool;
	public Poolb poolb;

	private Scores scores;

	void Start()
	{
		scores = GetComponent<Scores>();
	}
	
	void OnTriggerEnter(Collider other)
	{
		if(other.tag == "moving")
		{
			poolb.deActivate(gameObject);
			pool.deActivate(other.gameObject);
			Debug.Log("Hitting the moving object");
			scores.AddScore();
		}

		if(other.tag == "still")
		{
			poolb.deActivate(gameObject);
			Debug.Log("Hitting the Still object");
			Application.Quit();
		}
	}

}

And there is this third script which displays the score on canvas UI text

using UnityEngine;
using UnityEngine.UI;
using System.Collections;

public class DisplayScore : MonoBehaviour {

	Text txt;

	// Use this for initialization
	void Start () {
		txt = gameObject.GetComponent<Text>(); 
	}
	
	// Update is called once per frame
	void Update () {
		txt.text="Score : " + PlayerPrefs.GetInt("score"); 
	}
}

BUT WHILE PLAYING MY SCORE RESETS BACK TO 0 SOMETIMES. SOMETIMES DROPS TO ANY RANDOM NUMBER NUMBER 4 2.

I dont know what is the problem here.

And please write a proper mechanism to update a score and access it. I guess my method is too naive and error prone.

2

Your score pref reset back to 0 because you are Setting Player pref to 0 everytime in Awake method of “Scores” class, its unnecessary, remove that and you code should work fine

In AddScore method its passing “score” integer as it is to player pref which is available in your default Scores class , you should do something like this,

 public void AddScore(int myScore)
 { 
score = score + 1; 
PlayerPrefs.SetInt("score", myScore);
 Debug.Log(score); 
}

And in OnCollision of The Collision class call ,

 scores.AddScore(yourScore);