How to use PlayerPrefs to activate game objects permanently?

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Hello fam,

I am trying to create a simple trophy system wit$$anonymous$$n my game. I've managed to use PlayerPrefs to store data such as Integers for recording $$anonymous$$gh scores etc. but I can't seem to figure out how to easily implement PlayerPrefs for activating a trophy game object. Can someone please give me a play by play on how to ac$$anonymous$$eve t$$anonymous$$s? I'm using C#. Thank you so much for anyone reading t$$anonymous$$s.

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Answer by Deeblock · Jul 11, 2018 at 06:13 AM

All you have to do is assign a "key" to each trophy game object. For example, if you have a trophy called "Winner", you can simply assign it in PlayerPrefs:

 PlayerPrefs.SetInt("winnerTrophy", 1);

Since PlayerPrefs doesn't have booleans, we can use the integers 1 and 0 to represent true and false respectively. The integer is arbitrary; we only need the key to be stored in PlayerPrefs to check for trop$$anonymous$$es (i.e. only store trop$$anonymous$$es that have been activated in playerprefs).

Next, you would keep a list of trop$$anonymous$$es in either a ScriptableObject or a Monobehaviour Class with their key names. Thereafter, you would just use a simple for loop when the game starts:

 for (int i = 0; i < trop$$anonymous$$esList.Length; i++) {
     if (PlayerPrefs.HasKey(trop$$anonymous$$esList[i])) {
         // Trophy is activated, you can do other t$$anonymous$$ngs here
     }
 }

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EvanCheddar · Jul 11, 2018 at 02:52 PM 0

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Thanks for your reply. I still cant get this to work, IDK why but this PlayerPrefs is super confusing to me. Is there a way you can explain this step by step in layman's terms?

Deeblock EvanCheddar · Jul 11, 2018 at 03:19 PM 0

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What is the problem that you're encountering? PlayerPrefs is basically like a config file to store, as the name suggests, player preferences. Using it is very simple. It acts like a dictionary, meaning that it stores a Key-Value pair. The "key" points to the "value", meaning if you call the key, you will get the value.

PlayerPrefs can save three data types: Strings, floats and integers. These are the "values". Then, you will need a "key" to point to the value, which will always be a string. So you can have string,string or string, float or string, int.

Saving into PlayerPrefs is very simple. All you have to do is call:`PlayerPrefs.SetFloat(Key, Value)`, replacing the "SetFloat" with "SetString" or "SetInt" depending on the value type you are trying to save.

Retrieving data from PlayerPrefs works the same way:`PlayerPrefs.GetFloat(Key)`, replacing the "GetFloat" with "GetString" or "GetInt" respectively. Note here you are only putting the Key, beacuse the "key" points to the "value" you have stored.

EvanCheddar Deeblock · Jul 11, 2018 at 03:31 PM 0

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Ok i see, thank you that makes total sense. I think because you cant store game objects I'm getting confused on how to use it to effectively turn objects on and off permanently. I see what you're saying though, and Im trying to use your example code. I think my problem is that I cant get my for loop to work properly and having trouble with my trophy list set up.

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How to use PlayerPrefs to activate game objects permanently?

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