Unity C# Highscore table

While my solution may be a little bit "too much", at least, it works ! :D

First of all, create a script called HighScoreManager.cs and put the following script in it :

 using System.IO;
 using UnityEngine;
 
 [CreateAssetMenu(menuName = "ScriptableObjects/HighScoreManager", order = 1)]
 public class HighScoreManager : ScriptableObject
 {
     private string filePath;
 
     [SerializeField]
     private string fileName = "highScores" ;
 
     [SerializeField]
     private int highScoresCount = 5;
     
     [SerializeField]
     private int[] highScores;
 
     private string FilePath
     {
         get
         {
             if ( string.IsNullOrEmpty( filePath ) )
                 filePath = Path.Combine( Application.persistentDataPath, fileName );
             return filePath;
         }
     }
 
     public int HighScoresCount
     {
         get { return highScoresCount; }
     }
 
     public float this[int i]
     {
         get { return highScores[i]; }
     }
 
     public void SubmitHighScore( int highScore = 1000 )
     {
         if( highScores == null )
             highScores = new int[HighScoresCount];
 
         int newHighScoreIndex = -1;
         for ( int i = 0 ; i < highScores.Length ; i++ )
         {
             if( highScore >= highScores[i] )
             {
                 newHighScoreIndex = i;
                 break;
             }
         }
         if( newHighScoreIndex >= 0 )
         {
             for ( int i = highScores.Length - 1 ; i > newHighScoreIndex ; i-- )
             {
                 Debug.Log( highScores[i] );
                 Debug.Log( highScores[i-1] );
                 highScores[i] = highScores[i - 1];
             }
             highScores[newHighScoreIndex] = highScore;
         }
     }
 
     public void Save()
     {
         File.WriteAllText( FilePath, JsonUtility.ToJson( this ) );
     }
 
     public void Load()
     {
         string path = Path.Combine( Application.persistentDataPath, "highScores" );
 
         if ( File.Exists( FilePath ) )
         {
             JsonUtility.FromJsonOverwrite( File.ReadAllText( FilePath ), this );
         }
         if ( highScores.Length < highScoresCount )
             highScores = new int[highScoresCount];
     }
 }

Then, in the Project view, in Unity, right click and click on ScriptableObjects > HighScoreManager. You now have an object responsible for managing your highscores, and you will be able to submit a new highscore, save and load your highscores.

Here is a dummy script to test it :

 using UnityEngine;
 
 public class NewBehaviourScript : MonoBehaviour {
 
     public HighScoreManager highScoreManager ;
 
     private void Start()
     {
         highScoreManager.Load();
 
         for ( int i = 0 ; i < highScoreManager.HighScoresCount ; i++ )
         {
             Debug.Log( highScoreManager[i] );
         }
     }
 
     private void Update()
     {
         if ( Input.GetKeyUp( KeyCode.Keypad1 ) )
             highScoreManager.SubmitHighScore( 10 );
         if ( Input.GetKeyUp( KeyCode.Keypad2 ) )
             highScoreManager.SubmitHighScore( 20 );
         if ( Input.GetKeyUp( KeyCode.Keypad3 ) )
             highScoreManager.SubmitHighScore( 30 );
     }
 
     private void OnDestroy()
     {
         highScoreManager.Save();
     }
 }