Still cannot load a saved game

Questions & Answers
1

Hi, I’m trying to write a save/load class through BinaryWriter and BinaryReader. (I hope that method is secure enough.) I successfully saved the file, but I could not load it. Here is the relevant code:

SaveManager.cs:

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

public class SaveManager : MonoBehaviour
{
    public static string directory = @"\SaveLoad";
    public static string fileName = @"\saveFile.sav";
    public static string savePath;
    public static string saveDirectory;

    public static void Save(Player player)
    {
        saveDirectory = Application.persistentDataPath + directory;
        savePath = saveDirectory + fileName;

        if (!DirectoryExists())
            Directory.CreateDirectory(saveDirectory);

        FileStream sr = File.Create(savePath);
        BinaryWriter bw = new BinaryWriter(sr);

        PlayerData data = PlayerData.FromPlayer(player);
        bw.Write(data.Health);
        bw.Write(data.Lives);
        bw.Write(data.Score);

        if (data.Position == null)
        {
            bw.Write(0);
        }
        else
        {
            bw.Write(data.Position.Length);
            foreach (var value in data.Position)
            {
                bw.Write(value);
            }
        }
        sr.Close();

        Debug.Log("Your game has been saved.");
    }

    public static PlayerData Load()
    {
        saveDirectory = Application.persistentDataPath + directory;
        savePath = saveDirectory + fileName;

        if (!File.Exists(savePath))
        {
            Debug.LogError("Save file not found in " + savePath);
            return null;
        }
        FileStream sr = File.OpenRead(savePath);
        BinaryReader br = new BinaryReader(sr);

        PlayerData data = new PlayerData();
        data.Health = br.ReadInt32();
        data.Lives = br.ReadInt32();
        data.Score = br.ReadInt32();

        int length = br.ReadInt32();
        data.Position = new float[length];
        for (int index = 0; index < length; index++)
        {
            data.Position[index] = br.ReadSingle();
        }
        sr.Close();
        Debug.Log("Your game has been loaded.");

        return data;
    }

    private static bool SaveExists()
    {
        return File.Exists(GetFullPath());
    }

    private static bool DirectoryExists()
    {
        saveDirectory = Application.persistentDataPath + directory;
        return Directory.Exists(saveDirectory);
    }

    private static string GetFullPath()
    {
        saveDirectory = Application.persistentDataPath + directory;
        savePath = saveDirectory + fileName;
        return savePath;
    }
}

PlayerData.cs:

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

public class PauseScreen : MonoBehaviour
{
    public GameObject PauseCanvas;
    
    public static bool GameIsPaused;

    public PlayerController ball;

    public Player player;

    void Start()
    {
        GameIsPaused = false;
        ball = FindObjectOfType<PlayerController>();
        player = FindObjectOfType<Player>();
    }

    // Update is called once per frame
    void Update()
    {
        if (Input.GetButtonDown("Cancel"))
        {
            if (GameIsPaused)
            {
                Resume();
            }
            else
            {
                Pause();
            }
        }
    }

    public void Resume()
    {
        Time.timeScale = 1;
        GameIsPaused = false;
        PauseCanvas.SetActive(false);
    }

    public void Pause()
    {
        Time.timeScale = 0;
        GameIsPaused = true;
        PauseCanvas.SetActive(true);
    }

    public void MainMenu()
    {
        Resume();
        SceneManager.LoadScene("MainMenu");
    }

    public void StartScreen()
    {
        Resume();
        SceneManager.LoadScene("Intro");
    }

    public void Save()
    {
        player.Save();
    }
}

Player.cs:

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

public class Player : MonoBehaviour
{
    public int score = 0;
    public int lives = 9;
    public int health = 3;

    public void Save()
    {
        SaveManager.Save(this);
    }

    public void Load()
    {
        PlayerData data = SaveManager.Load();
        score = data.Score;
        lives = data.Lives;
        health = data.Health;

        Vector2 position;
        position.x = data.Position[0];
        position.y = data.Position[1];
        transform.position = position;
    }
}

Can someone please tell me what I did wrong and/or what I am missing? Any assistance would be appreciated.

Sincerely,
burchland2

2

Where or when do you actually call your Load method in your player class? Have you added some Debug.Logs to your code to verify which parts actually execute? We can not debug your code for you since we only know what you are telling us. The code you’ve shown never calls the Load method anywhere. So we can not verify it runs at all.

3

@Bunny83

Thanks for the suggestion.

I just called it in the SweetSpot class here,

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

public class SweetSpot : MonoBehaviour
{
public Player player;

 // Start is called before the first frame update
 void Start()
 {
     player = FindObjectOfType<Player>();
 }

 public void Load()
 {
     player.Load();
 }

}

and placed it in the appropriate game object in a button that belongs to a different scene in the game (SweetSpot). But as soon as I tested the game again, nothing happened other than the Debug.Log line. I verified that the saved file is present within the Application.persistentDataFile folder, but it just cannot be loaded back in.