Leveling UP/ Experience system using PlayerPrefs

Question

Heya guys, I almost have an idea on getting an experience system down using PlayerPrefs. Only trying to figure out how I would apply it to multiple characters not just the one.

I have it set as each time I kill an enemy I gain 10 exp, but unsure on how to make it not affect a separate character that starts on level 1.

         int experience = PlayerPrefs.GetInt("Experience", exp);
         void Update()
     {
         if(enemyHeath =< 1)
         {   
         PlayerPrefs.SetInt("Experience",PlayerPrefs.GetInt("Experience")+10);
         }
     
     if (PlayerPrefs.GetInt("Experience") > 500)
     
        {
           PlayerPrefs.SetInt("SavedLevelUp1", 500);
        }

Any idea please help and thank you in advance.

Answer 1

Answer by Statement · Mar 06, 2013 at 02:47 PM

Hi, while it can be used for arbitrary storage, it isn't really intended for savegame features as it is limited and very simple.

From docs:

Stores and accesses player preferences between game sessions.

Anyhow, if you still want to go on with it, I presume your issue is that you don't know how to store experience for player 1 and for player 2 and so on..

You could have

 // How many players exist here?
 int numPlayers = PlayerPrefs.GetInt("NumberOfPlayer", 0);
 // Select which player should play (or possibly create a new one)
 int player = SelectAPlayerToPlayWith(numPlayers);

 // Get the player specific pref keys
 string keyExperience = string.Format("Player{0}.Experience", player);
 string keySavedLevelUp1 = string.Format("Player{0}.SavedLevelUp1", player);

 // ... your existing code with some modifications
 int experience = PlayerPrefs.GetInt(playerExperience, exp);
 void Update()
 {
     if(enemyHeath =< 1)
         PlayerPrefs.SetInt(keyExperience, PlayerPrefs.GetInt(keyExperience) + 10);
     if (PlayerPrefs.GetInt(keyExperience) > 500)
         PlayerPrefs.SetInt(keySavedLevelUp1, 500);

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Alter · Mar 07, 2013 at 11:58 AM 0

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Cheers, Statement. It's not so much as a player(s) but characters themselves, in the game I'm designing there is 9 unlock-able characters. So that being said would that apply for the "NumberOfPlayer"? sorry guys, I'm trying to get my head around it but it's still not clicking as fast as I want it too.

An Idea that came to my head was that, since each character has a different weapon I was thinking of something like:

      if(other.gameObject.tag =="Sword")
             {
                 PlayerPrefs.SetInt("KnightExperience" + 10);
                 Debug.Log("Gain 10exp");
                 //
     
             }
 
      if(other.gameObject.tag =="Dagger")
             {
                 PlayerPrefs.SetInt("RogueExperience" + 10);
                 Debug.Log("Gain 10exp");
                 //
     
             }

Then apply this script to each character with a 'prefs' script with;

 knightLevelReached = PlayerPrefs.GetInt("KnightExperience");
 
 public int knightLevelReached = 0;
 
 void Update()
 {
 if(knightLevelReached > 100)
 {
    Debug.Log("Reached Level 2")
 }
 }

Any thoughts?

Answer 2

Answer by poncho · Mar 05, 2013 at 03:19 PM

Use a variable to Have your level, "PlayerLevel", and use a math formula to have the experience required per level, 1st level 10exp, 2nd level 25exp, 3rd lvl 45 exp, etc..., so now your experience validation would be

 if(experience > ExperienceOnLevel(Playerprefs.GetInt(PlayerLevel)))
 {
 //add a level to playerlevel, and add stats according to it
 }

good luck and happy coding

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Alter · Mar 06, 2013 at 01:14 PM 0

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Thank you for the reply. But I'm not sure if I understand this, but pretty much just replace the exp code with what you have given me? Also how would this work on separate characters? Sorry, I'm new to programming and have just been working on level unlocks which effects the whole game and the same with coins collected. ^^

poncho · Mar 06, 2013 at 02:15 PM 0

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no, use the logic of having Independent variable for your characters, PlayerLevel1, PlayerLevel2,... and also having ExpPlayer1, ExpPlayer2,... the ExperienceOnLevel Method, should return your calculated exp per level that in case your experience is above that amount, then your player will get a levelup, for the new in programming, i would recommend, c# for dummies, GREAT book to learn from start. happy coding

Leveling UP/ Experience system using PlayerPrefs

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