Saving your scene and location in game?

Questions & Answers
1

Im working on a level based game in which a player goes therough long unique levels to get to a point in the game and loads up another scene. It would be nice to have a save system so when youcexit out or when the game crashes, it will know your location and the scene your on. I have seen someone save the gems they have collected to keep track of where they were. But i would like it so it auto saves every minute for a location and scene. I suppose it would be easier to only do scene so it would be cool if someone could help me do it both ways. I would also love it if i can have bakup save files in case the game is deleted and put those bakups in lets say programs 86 or appdata. If anyone could help me with that it would come in handy in a lot of things so i can learn to access a users files to give them hints. Im sure im not the only one wanting to learn this. I cant watch videos fyi lol.

2

You can use a BinaryFormatter to serialize and save a class instance to file.

First, We need a class that holds all the data that you want to save.

 using UnityEngine;
 using System.Collections;
 
 [System.Serializable]//Important! Every custom class that needs to be serialized has to be marked like this!
 public class Game { //don't need ": Monobehaviour" because we are not attaching it to a game object
 
     public string savegameName;//used as the file name when saving as well as for loading a specific savegame
     public string testString;//just a test variable of data we want to keep
 
         
 }

Now, we need the actual functions that save and load a Game instance.

using UnityEngine;
 using System.Collections;
 using System.Collections.Generic;
 using System.Runtime.Serialization.Formatters.Binary;
 using System.IO;
 
 public static class SaveLoad {

     //it's static so we can call it from anywhere
     public static void Save(Game saveGame) {
         
         BinaryFormatter bf = new BinaryFormatter();
         FileStream file = File.Create ("C:/Savegames/" + saveGame.savegameName + ".sav"); //you can call it anything you want, including the extension. The directories have to exist though.
         bf.Serialize(file, saveGame);
         file.Close();
         Debug.Log("Saved Game: " + saveGame.savegameName);
 
     }    
     
     public static Game Load(string gameToLoad) {
         if(File.Exists("C:/Savegames/" + gameToLoad + ".sav")) {
             BinaryFormatter bf = new BinaryFormatter();
             FileStream file = File.Open("C:/Savegames/" + gameToLoad + ".gd", FileMode.Open);
             Game loadedGame = (Game)bf.Deserialize(file);
             file.Close();
             Debug.Log("Loaded Game: " + loadedGame.savegameName);
         }
         else {
              Debug.Log("File doesn't exist!");
              return null;
         }

     }
 
 
 }

For testing purposes, use a simple script attached to a gameobject that call the save and load functions.

using UnityEngine;
using System.Collection;

public class SaveLoadMenu : MonoBehaviour {
 
     public string text = "";//the string we want to save and load. Corresponds to Game.testString
     private string saveGameName = "My Saved Game";//The name of our saved game to save and load.
 
     void OnGUI () {
         saveGameName = GUI.TextArea(new Rect(20, 0, 50, 200), saveGameName);
         text = GUI.TextArea(new Rect(20, 50, 50, 200), text);
 
         if(GUI.Button(new Rect(20, 100, 50 150), "Save")){
             Game newSaveGame = new Game();
             newSaveGame.saveGameName = saveGameName;
             newSaveGame.testString = text;
             SaveLoad.Save(newSaveGame);
         }
 
         if(GUI.Button(new Rect(20, 150, 50, 150), "Load")){
             Game loadedGame = SaveLoad.Load (saveGameName);
             if(loadedGame != null) {
                  text = loadedGame.testString;
             }
         }
     }
}