在InitializeOnLoad上更改GameObject组件

Question

I created script that i want to use as main script when my game launch. Now i want to access specific button text via that script and change it's text. I have problem because my text is not changing. Here is what i was trying:

static main()
{
    Debug.Log("Up and running");
    GameObject devButtonText = GameObject.Find("devButtonText");
    Text text = devButtonText.GetComponent<Text>();
    text.text = "Test";
}

Button is devButton and text is devButtonText

full script

using UnityEngine;
using UnityEditor;
using System.Collections;
using UnityEngine.UI;


[InitializeOnLoad]
public class main : MonoBehaviour {


    static main()
    {
        Debug.Log("Up and running");
        GameObject devButton = GameObject.Find("devButton");
        Text text = devButton.GetComponentInChildren<Text>();
        text.text = "Test";
    }

    // Use this for initialization
    void Start () { 

    }

    // Update is called once per frame
    void Update () {

    }
}

Answer 1

I created script that i want to use as main script when my game launch.

The InitializeOnLoad attribute must be used to run a function when the Unity Editor starts , not the game. Every editor script won't run when you compile your game. Unity documentation

Sometimes, it is useful to be able to run some editor script code in a project as soon as Unity launches without requiring action from the user.

---

Instead, create an Empty GameObject and attach the following script :

using UnityEngine;
using System.Collections;
using UnityEngine.UI;


public class ChangeText : MonoBehaviour
{
    private void Awake()
    {
        GameObject devButton = GameObject.Find("devButton");
        Text text = devButton.GetComponentInChildren<Text>();
        text.text = "Test";
    }
}

Even better :

using UnityEngine;
using System.Collections;
using UnityEngine.UI;


public class ChangeText : MonoBehaviour
{
    // Drag & Drop the desired Text component here
    public Text TextToChange ;

    // Write the new content of the Text component
    public string NewText ;

    private void Awake()
    {
        TextToChange.text = NewText;
    }
}

The script will automatically be called when the scene starts.

Answer 2

When Initializing a MonoBehaviour

1. You should use Start, Awake or OnEnable.

2. You shouldn't use constructor, static constructor or field initialization (like public GameObject go = GameObject.Find("devButton"); )

This should work:

using UnityEngine;
using UnityEditor;
using System.Collections;
using UnityEngine.UI;


public class main : MonoBehaviour {


    void Awake () { 
        Debug.Log("Up and running");
        GameObject devButton = GameObject.Find("devButton");
        Text text = devButton.GetComponentInChildren<Text>();
        text.text = "Test";
    }
}

Edit

Given the name main I guess this is the starting point of your project so if your script is not attached to any game object then Start, Awake or OnEnable would not be called. In this case you should attach it to a game object and change the unity script execution order and bring the script to the earliest point.