Why can't I serialize anything with my custom inspector?

Unity Engine
1

So I’ve written a custom inspector for a couple of my classes, to make them more presentable and to show some information mid-game that would otherwise be hidden. Problem is, no matter what I change in the inspector, as soon as I hit “Play” everything snaps back to default values. No matter what I do, nothing works.

Here are two scripts that I’m having problems with.
This is the source code for the class:

using UnityEngine;
using System;
using System.Collections;
using System.Collections.Generic;

[Serializable]
public class Skills : MonoBehaviour
{
    public int startingExp = 0;
    public int maxLevel = 100;

    public float expCurveConst = 0.0f;
    public float expCurveScalar = 80.0f;
    public float expCurveSquare = 15.0f;
    public float expCurveCube = 5.0f;
   
    public int ExpReqForLevel(int level)
    {
        return (int)(expCurveConst    +
                     (level * expCurveScalar) +
                     (level * level * expCurveSquare) +
                     (level * level * level * expCurveCube) );
    }
   
   
   
    [SerializeField]
    private int[] _lvl = new int[(int)SkillName.MAX_SKILLS];
    [SerializeField]
    private int[] _exp = new int[(int)SkillName.MAX_SKILLS];
   
    public void Awake()
    {
        for (int i = 0; i < (int)SkillName.MAX_SKILLS; ++i)
        {
            _exp[i] = startingExp;
            UpdateSkill(i);
        }
    }
   
    public int GetLevel(int index)
    {
        return _lvl[index];
    }
   
    public void SetLevel(int index, int value)
    {
        if (value <= 0)
            _exp[index] = 0;
        else if (value >= maxLevel)
            _exp[index] = ExpReqForLevel(maxLevel -1);
        else
            _exp[index] = ExpReqForLevel(value -1);
       
        _lvl[index] = value;
        UpdateSkill(index);
    }
   
    public void GainLevel(int index, int value)
    {
        value = _lvl[index] + value;
       
        if (value <= 0)
            _exp[index] = 0;
        else if (value >= maxLevel)
            _exp[index] = ExpReqForLevel(maxLevel -1);
        else
            _exp[index] = ExpReqForLevel(value -1);
       
        _lvl[index] = value;
        UpdateSkill(index);
    }

    public int GetExp(int skill)
    {
        return _exp[skill];
    }

    public void GainExp(int skill, int expGained)
    {
        _exp[skill] += expGained;
        UpdateSkill(skill);
    }

    public void SetExp(int skill, int newExp)
    {
        _exp[skill] = newExp;
        UpdateSkill(skill);
    }
   
    private void UpdateSkill(int skill)
    {
        // Clean up boundary cases //
        if (_lvl[skill] > maxLevel)
            _lvl[skill] = maxLevel;
        if (_lvl[skill] < 0)
            _lvl[skill] = 0;

        // If we've reached the amount of exp we need, level up! //
        while (_exp[skill] >= ExpReqForLevel(_lvl[skill]) )
        {
            _lvl[skill]++;
        }

        // If our xp is too low for the level we ought to be at, level down :( //
        while ((_lvl[skill] > 0) && (_exp[skill] < ExpReqForLevel(_lvl[skill] -1)))
        {
            _lvl[skill]--;
        }
    }
}

public enum SkillName
{
    Brawling,
    Precision,
    Necromancy,
    Discipline,

    MAX_SKILLS
}

And the corresponding code for the editor:

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

[CustomEditor(typeof (Skills))]
public class SkillsEditor : Editor
{
    bool showskills = true;
    Skills skills;

    void OnEnable()
    {
        skills = (Skills)target;

        if (!Application.isPlaying)
        {
            skills.Awake();
        }
    }

    public override void OnInspectorGUI()
    {   
        skills.startingExp = EditorGUILayout.IntField("Starting EXP", skills.startingExp);
        skills.maxLevel = EditorGUILayout.IntField ("Max Level", skills.maxLevel);

        // The multipliers for the exp-for-level polynomial function. //
        EditorGUILayout.LabelField("EXP Curve");
        EditorGUILayout.BeginHorizontal();
        {
            skills.expCurveConst = EditorGUILayout.FloatField(skills.expCurveConst);
            skills.expCurveScalar = EditorGUILayout.FloatField(skills.expCurveScalar);
            skills.expCurveSquare = EditorGUILayout.FloatField(skills.expCurveSquare);
            skills.expCurveCube = EditorGUILayout.FloatField(skills.expCurveCube);
        }
        EditorGUILayout.EndHorizontal();

        // Display and allow the developer to modify individual skills. //
        showskills = EditorGUILayout.Foldout(showskills, "Show skills");
        if (showskills)
        {
            EditorGUILayout.BeginHorizontal();
             EditorGUILayout.Space();
             EditorGUILayout.LabelField( "Skill Name", "Level" );
             EditorGUILayout.LabelField( "Experience" );
            EditorGUILayout.EndHorizontal();

            for (int i = 0; i < (int)SkillName.MAX_SKILLS; ++i)
            {
                EditorGUILayout.BeginHorizontal();
                 EditorGUILayout.Space(); EditorGUILayout.Space();
                 skills.SetLevel(i, EditorGUILayout.IntField( ((SkillName)i).ToString(), skills.GetLevel(i) ));
                 skills.SetExp(i, EditorGUILayout.IntField( skills.GetExp(i)) );
                EditorGUILayout.EndHorizontal();
            }
        }
    }
}

Even when I modify public variables like maxLevel in the inspector, it always jumps back to default the second it loads.

What the heck is going on here?

2

Sorry my reply is short (I’m on a tablet)

Try this:

When you change something in the custom inspector, mark the target dirty.

3

Ha! It worked! Thank you so much!