How can you save and update data between scenes and upon log in?

Question

Hello, I am new to scripting and unity3d. I am still trying to understand OOP as well.

My issue: I have a static class that i am using to save data - specifically the following: Username and the amount of gold that user has. I am calling it LevelManager I can't figure out what the best way to do this is.

LevelManager

 public class LevelManager 
 {
     public static LevelManager lvlManager = new LevelManager();
     public static void LoadLevel(string name)
     {
         Debug.Log ("New Level Load: " + name);
         Application.LoadLevel (name);
     }
     public static void QuitRequest()
     {
         Debug.Log ("Quit requested");
         Application.Quit ();
     }
     public static void initalize( ref string Name,  
                                     ref string Name2,  
                                     ref int admin_Gold,  
                                     ref int admin_Gold1)
     {
         Name = "Admin";
         Name2 = "Admin1";
         admin_Gold = 1000;
         admin_Gold1 = 500;
     }
 }

In A different class that I created for the Login Screen I am calling the LeveManager.intalize Method this class is called:

LoginManager

 public class LoginManager : MonoBehaviour {
     public string userName;
     public string passWord;
     public Image loginButton;
     public Image RepairButton;
     public Image SellButton;
     public string str1;
     public string str2;
     public int int1;
     public int int2;
 public void LoginFunction()
     {
         userName = GameObject.Find ("UserName").GetComponent<InputField>().text;
         passWord = GameObject.Find ("Password").GetComponent<InputField>().text;
         
         LevelManager.initalize( ref str1, 
                                 ref str2, 
                                 ref int1, 
                                 ref int2);
         string UserName = str1;
         string UserName2 = str2;
         if (userName == UserName && passWord == "password"
              || userName == UserName2 && passWord == "password1")
         {
             Debug.Log("the user name" + UserName);
             Application.LoadLevel("MainMenu");
         }else{
             Debug.Log("Else Statement");
             Debug.Log(userName + passWord);
         };
     }

} I want to take the username and be able to save it back to the static class as a value. On another class (that i have not created yet) I want to be able to update the value for gold and save it as well. Does anyone have any recommendations? What is this kind of idea called in OOP?

Answer 1

Answer by kingcoyote · Sep 17, 2015 at 06:09 AM

Looks like you want to use the PlayerPrefs class. It allows for persistent storage between game sessions. You can write values to PlayerPrefs using a few different commands:

 PlayerPrefs.SetInt("Gold", 1500);
 PlayerPrefs.SetString("Name", "Admin");

or read from PlayerPrefs using other commands:

 Name = PlayerPrefs.GetString("Name");
 Gold = PlayerPrefs.GetInt("Gold");

The Get commands take an extra optional parameter that is the default value. That works to return a value if one hasn't already been stored. Say you want to get the gold amount, and return 1500 the first time when gold hasn't been set:

 Gold = PlayerPrefs.GetInt("Gold", 1500);

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cdm89 · Sep 28, 2015 at 12:31 AM 0

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@kingcoyote

Thank you so much for your answer this is very helpful. I was wondering though, lets say in the future i wanted this code to exist on a server, could i still use playerprefs? - is it ideal to build my own static class? (As i was trying to do originally) and if the answer is yes. what would i use to achieve this?

Thanks

How can you save and update data between scenes and upon log in?

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