Change variable value using new UI Button

Question

Basically what I am trying to achieve is changing the variable value when I click a button. This is the code where I change the variable through a function

 using UnityEngine;
 using UnityEngine.UI;
 using System.Collections;
 
 public class LocalPlayer : MonoBehaviour
 {
     //Define All Classes
     public int playerClass;
 
     public void RunnerClassValue() { playerClass = 1; }
     public void KillerClassValue() { playerClass = 2; }
     public void SpectatorClassValue() { playerClass = 3; }
 
     void Update()
     {
         Debug.Log("PlayerClass: " + playerClass);
     }
 }

Image with the button to see that I set the correct function alt text

Basically the problem is that in the update the Debug keeps display 0 instead of 1 or 2 or 3 after I click the button. If I add a debug in the function it displays the function value but not in update.

Answer 1

it's been more than a year i know, but i actually was facing the same problem until very recently. So i'm posting this to anyone who, like me, is having trouble with that. I Actually used the SendMessage() function to call another function in the script attached to the game object i was trying to access. So here's my suggestion.

You should add the following script to your button prefab:

 **using** UnityEngine;
 **using** System.Collections;
 **using** UnityEngine.UI;
 
 public class ButtonTest : MonoBehaviour {
 
     Button button = null;
     string tag;
 
 
     void Start () 
     {
         button = gameObject.GetComponent<Button>();
         button.onClick.AddListener(() =>{Click();});
         tag = transform.tag;
     }
     
 
     void Click () 
     {
         switch (tag) 
         {
         case "Runner":
             GameObject.FindGameObjectWithTag("player").SendMessage ("RunnerClassValue");
             break;
         case "Killer":
             GameObject.FindGameObjectWithTag("player").SendMessage ("KillerClassValue");
             break;
         case "Spectator":
             GameObject.FindGameObjectWithTag("player").SendMessage ("SpectatorClassValue");
             break;
         }    
     }
 }

so basically the line GameObject.FindGameObjectWithTag("player").SendMessage ("SpectatorClassValue"); will look for any game object with the tag "player", look in his components for the functions put as argument in the SendMessage and call them.

Answer 2

Answer by boowman · Dec 22, 2014 at 12:47 PM

Ok so I just found out why it doesn't work. Basically LocalPlayer script is attached to a PlayerPref which will get instantiated when I press Play. Any way to fix that?

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Change variable value using new UI Button

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