Set Buttons to Interactable within C#

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I feel like I am missing something simple... but basically I have a menu where the player picks level 1-36. Each button is names after the level it loads... 1 is 1, 13 is 13...

I setup player prefs to store a variable when loading levels... Load level 5, if playerpref of UnlockedLevel<5, set to 5... That bit works.. even hitting delete and setting it back to 1 works (according to some debug outputs).

Now when the menu loads I believe I should be able to loop through from 1 to n where n is playerprefs UnlockedLevel value.

 void LoadMainMenu()
 {
     Button levelButton;
     Application.LoadLevel("Main");
     //unlock Levels from Player Prefs
     int UnlockToLevel = PlayerPrefs.GetInt ("UnlockToLevel");
     for(int n = 1; n <=  UnlockToLevel; n++)
     {
         levelButton = GameObject.FindGameObjectsWithTag (n.ToString ());
         levelButton.SetActive(true);
     }

I know UnlockToLevel is being set to the proper number. This is my first attempt at a for loop, but I believe the loop itself is correct.

I am sure my issue is saying "let's grab button n". I tried it with "3" instead of n and the error for that line disappears but button 3 isn't being unlocked. So should I somehow cast the int to a string? Am I even going about this the right way?

Thanks!

EDIT: updated code to show what I have changed to. I think i'm getting closer...

Answer 1

Best Answer

Answer by HarshadK · May 15, 2015 at 07:22 AM

There are a few things here and there in your script. Check comments in the code below to understand what has changed.

 void LoadMainMenu()
 {
     // Changed the type of levelButton to GameObject since that is what you are using in your for loop
     GameObject levelButton;
     // This line is commented out since you don't want to load level before here.
 //         Application.LoadLevel("Main");
          //unlock Levels from Player Prefs
     int UnlockToLevel = PlayerPrefs.GetInt ("UnlockToLevel");
     for(int n = 1; n <=  UnlockToLevel; n++)
          {
         // Replaced FindGameObjectsWithTag by Find since you need to find your gameobject by name and not tag as your n is the name of the gameobject
              levelButton = GameObject.Find(n.ToString ());
              levelButton.SetActive(true);
          }
 }

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Wulf_BiAS · May 15, 2015 at 08:00 PM 0

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Thanks for assisting. I will try these when I get a moment. Should I be processing level unlocks separately from loading the level? I want this to happen once the main menu is loaded.

Wulf_BiAS · May 21, 2015 at 11:00 PM 0

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while that compiles it unfortunately leaves me with this error: NullReferenceException: Object reference not set to an instance of an object PlayerController.Load$$anonymous$$ain$$anonymous$$enu () (at Assets/Scripts/PlayerController.cs:279)

There has to be something straight forward about GUI buttons that I am just missing.

HarshadK · May 22, 2015 at 05:32 AM 0

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Check if levelButton is found by using a Debug.Log.

Put:

 Debug.Log(levelButton);

after line:

 levelButton = GameObject.Find(n.ToString ());

Wulf_BiAS · May 28, 2015 at 04:07 PM 0

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I accidentally opened with the old editor and it wiped my menu scene. Thanks anyway. :(

Set Buttons to Interactable within C#

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